DescriptionThe HD44780U dot-matrix liquid crystal display controller and driver LSI displays alphanumerics, Japanese kana characters, and symbols. It can be configured to drive a dot-matrix liquid crystal display under the control of a 4- or 8-bit microprocessor. Since all the functions such as display RAM, character generator, and liquid crystal driver, required for driving a dot-matrix liquid crystal display are internally provided on one chip, a minimal system can be interfaced with this controller/driver.A single HD44780U can display up to one 8-character line or two 8-character lines.The HD44780U has pin function compatibility with the HD44780S which allows the user to easily replace an LCD-II with an HD44780U. The HD44780U character generator ROM is extended to generate 208 5 × 8 dot character fonts and 32 5 × 10 dot character fonts for a total of 240 different character fonts.The low power supply (2.7V to 5.5V) of the HD44780U is suitable for any portable battery-driven product requiring low power dissipation.
Features• 5 × 8 and 5 × 10 dot matrix possible• Low power operation support: - 2.7 to 5.5V• Wide range of liquid crystal display driver power - 3.0 to 11V• Liquid crystal drive waveform - A (One line frequency AC waveform)• Correspond to high speed MPU bus interface - 2 MHz (when VCC = 5V)• 4-bit or 8-bit MPU interface enabled• 80 × 8-bit display RAM (80 characters max.)• 9,920-bit character generator ROM for a total of 240 character fonts - 208 character fonts (5 × 8 dot) - 32 character fonts (5 × 10 dot)• 64 × 8-bit character generator RAM - 8 character fonts (5 × 8 dot) - 4 character fonts (5 × 10 dot)• 16-common × 40-segment liquid crystal display driver• Programmable duty cycles - 1/8 for one line of 5 × 8 dots with cursor - 1/11 for one line of 5 × 10 dots with cursor - 1/16 for two lines of 5 × 8 dots with cursor• Wide range of instruction functions: - Display clear, cursor home, display on/off, cursor on/off, display character blink, cursor shift, display shift• Pin function compatibility with HD44780S• Automatic reset circuit that initializes the controller/driver after power on• Internal oscillator with external resistors• Low power consumption
The SM5009 series are crystal oscillator module ICs that incorporate low crystal current type oscillating circuit to limit oscillator-stage current, so that they can reduce crystal current lower than the existing products. Since the oscillating circuit has oscillator capacitors with excellent frequency response and feedback resistor built-in, just connecting crystal realizes stable fundamental oscillation responding up to 40MHz. The SM5009 series are ideal for SMD type crystal oscillator using a strip-shaped crystal blank.
■ Low crystal current oscillator
■ Up to 40MHz operating frequency range (funda mental oscillation)
■ Operating supply voltage range
• 3V operation: 2.7 to 3.6V
• 5V operation: 4.5 to 5.5V
■ –40 to 85°C operating temperature range
■ Oscillation capacitors CG, CD built-in
■ Inverter amplifier feedback resistor built-in
■ Standby function
• Oscillator stops (AL series), high impedance in standby mode
■ Low standby current
• Power-save pull-up resistor built-in (AL series)
■ Frequency divider built-in (fO, fO/2, fO/4, fO/8, fO/16, fO/32 determined by internal connection)
■ Output drive capability
• AL×, AN×, AK×, CN×: 16mA (VDD = 4.5V)
• AH×: 4mA (VDD = 4.5V)
■ Output load: CL = 50pF max.
■ Output duty level
• CMOS level (1/2 VDD): AL×, AN×, AH×, CN×
• TTL level (1.4V): AK×
■ Molybdenum-gate CMOS process
■ 8-pin SOP (SM5009×××S)
■ Chip form (CF5009×××)
DescriptionThe LMK0480x family is the industrys highest performance clock conditioner with superior clock jitter cleaning, generation, and distribution with advanced features to meet next generation system requirements. The dual loop PLLatinum™ architecture is capable of 111 fs rms jitter (12 kHz to 20 MHz) using a low noise VCXO module or sub-200 fs rms jitter (12 kHz to 20 MHz) using a low cost external crystal and varactor diode.The dual loop architecture consists of two high-performance phase-locked loops (PLL), a low-noise crystal oscillator circuit, and a high-performance voltage controlled oscillator (VCO). The first PLL (PLL1) provides low-noise jitter cleaner functionality while the second PLL (PLL2) performs the clock generation. PLL1 can be configured to either work crystal oscillator with an external tunable crystal and with an external VCXO module or the integrated varactor diode. When paired with a very narrow loop bandwidth, PLL1 uses the superior close-in phase noise (offsets below 50 kHz) of the VCXO module or the tunable crystal to clean the input clock. The output of PLL1 is used as the clean input reference to PLL2 where it locks the integrated VCO. The loop bandwidth of PLL2 can be optimized to clean the far-out phase noise (offsets above 50 kHz) where the integrated VCO outperforms the VCXO module or tunable crystal used in PLL1.
Features• Ultra-Low RMS Jitter Performance – 111 fs RMS Jitter (12 kHz to 20 MHz) – 123 fs RMS Jitter (100 Hz to 20 MHz)• Dual Loop PLLatinum™ PLL Architecture• PLL1 – Integrated Low-Noise Crystal Oscillator Circuit – Holdover Mode when Input Clocks are Lost – Automatic or Manual Triggering/Recovery• PLL2 – Normalized PLL Noise Floor of –227 dBc/Hz – Phase Detector Rate up to 155 MHz – OSCin Frequency-Doubler – Integrated Low-Noise VCO• 2 Redundant Input Clocks with LOS – Automatic and Manual Switch-Over Modes• 50 % Duty Cycle Output Divides, 1 to 1045 (Even and Odd)• 12 LVPECL, LVDS, or LVCMOS Programmable Outputs• Digital Delay: Fixed or Dynamically Adjustable• 25 ps Step Analog Delay Control.• 14 Differential Outputs. Up to 26 Single Ended. – Up to 6 VCXO/Crystal Buffered Outputs• Clock Rates of up to 1536 MHz• 0-Delay Mode• Three Default Clock Outputs at Power Up• Multi-Mode: Dual PLL, Single PLL, and Clock Distribution• Industrial Temperature Range: –40 to 85°C• 3.15-V to 3.45-V Operation• 2 Dedicated Buffered/Divided OSCin Clocks• Package: 64-Pin WQFN (9.0 × 9.0 × 0.8 mm)
Applications• Data Converter Clocking• Wireless Infrastructure• Networking, SONET/SDH, DSLAM• Medical / Video / Military / Aerospace• Test and Measurement
Summary descriptionThe M41T56 is a low power, Serial Real Time Clock with 56 bytes of NVRAM. A built-in 32,768Hz oscillator (external crystal controlled) and the first 8 bytes of the RAM are used for the clock/calendar function and are configured in binary coded decimal (BCD) format.Addresses and data are transferred serially via a two-line, bi-directional bus. The built-in address register is incremented automatically after each WRITE or READ data byte.The M41T56 clock has a built-in power sense circuit which detects power failures and automatically switches to the battery supply during power failures. The energy needed to sustain the RAM and clock operations can be supplied from a small lithium coin cell.Typical data retention time is in excess of 10 years with a 50mAh, 3V lithium cell. The M41T56 is supplied in an 8-lead Plastic SOIC package or a 28-lead SNAPHAT® package.The 28-pin, 330mil SOIC provides sockets with gold plated contacts at both ends for direct connection to a separate SNAPHAT housing containing the battery and crystal. The unique design allows the SNAPHAT battery package to be mounted on top of the SOIC package after the completion of the surface mount process. Insertion of the SNAPHAT housing after reflow prevents potential battery and crystal damage due to the high temperatures required for device surface-mounting. The SNAPHAT housing is keyed to prevent reverse insertion. The SOIC and battery/crystal packages are shipped separately in plastic anti-static tubes or in Tape & Reel form.
Feature summary■ Counters for seconds, minutes, hours, day, date, month, years, and century■ 32 KHz crystal oscillator integrating load capacitance (12.5pF) providing exceptional oscillator stability and high crystal series resistance operation■ Serial interface supports I2C Bus (400kHz protocol)■ Ultra-low battery supply current of 450nA (typ@3V)■ 5V ±10% supply voltage■ Timekeeping down to 2.5V■ Automatic power-fail detect and switch circuitry■ 56 bytes of general purpose RAM■ Software clock calibration to compensate crystal deviation due to temperature■ Automatic leap year compensation■ Operating temperature of –40 to 85°C■ Packaging options include: – 28-lead SOIC and SNAPHAT® TOP (to be ordered separately) – SO8N
SUMMARY DESCRIPTIONThe M48T08/18/08Y TIMEKEEPER® RAM is an 8K x 8 non-volatile static RAM and real time clock which is pin and functional compatible with the DS1643. The monolithic chip is available in two special packages to provide a highly integrated battery backed-up memory and real time clock solution.The M48T08/18/08Y is a non-volatile pin and function equivalent to any JEDEC standard 8K x 8 SRAM. It also easily fits into many ROM, EPROM, and EEPROM sockets, providing the non-volatility of PROMs without any requirement for special WRITE timing or limitations on the number of WRITEs that can be performed.The 28-pin, 600mil DIP CAPHAT™ houses the M48T08/18/08Y silicon with a quartz crystal and a long-life lithium button cell in a single package.The 28-pin, 330mil SOIC provides sockets with gold plated contacts at both ends for direct connection to a separate SNAPHAT® housing containing the battery and crystal. The unique design allows the SNAPHAT battery package to be mounted on top of the SOIC package after the completion of the surface mount process. Insertion of the SNAPHAT housing after reflow prevents potential battery and crystal damage due to the high temperatures required for device surface mounting. The SNAPHAT housing is keyed to prevent reverse insertion.The SOIC and battery/crystal packages are shipped separately in plastic anti-static tubes or in Tape & Reel form. For the 28 lead SOIC, the battery/crystal package (e.g., SNAPHAT) part number is “M4T28-BR12SH” or “M4T32-BR12SH” (see Table 17., page 25).
FEATURES SUMMARY■ INTEGRATED ULTRA LOW POWER SRAM, REAL TIME CLOCK, POWER-FAIL CONTROL CIRCUIT, AND BATTERY■ BYTEWIDE™ RAM-LIKE CLOCK ACCESS■ BCD CODED YEAR, MONTH, DAY, DATE, HOURS, MINUTES, and SECONDS■ TYPICAL CLOCK ACCURACY OF ±1 MINUTE A MONTH, AT 25°C■ AUTOMATIC POWER-FAIL CHIP DESELECT AND WRITE PROTECTION■ WRITE PROTECT VOLTAGES (VPFD = Power-fail Deselect Voltage): – M48T08: VCC = 4.75 to 5.5V 4.5V ≤ VPFD ≤ 4.75V – M48T18/T08Y: VCC = 4.5 to 5.5V 4.2V ≤ VPFD ≤ 4.5V■ SOFTWARE CONTROLLED CLOCK CALIBRATION FOR HIGH ACCURACY APPLICATIONS■ SELF-CONTAINED BATTERY AND CRYSTAL IN THE CAPHAT™ DIP PACKAGE■ PACKAGING INCLUDES A 28-LEAD SOIC AND SNAPHAT® TOP (to be ordered separately)■ SOIC PACKAGE PROVIDES DIRECT CONNECTION FOR A SNAPHAT TOP WHICH CONTAINS THE BATTERY AND CRYSTAL■ PIN AND FUNCTION COMPATIBLE WITH DS1643 and JEDEC STANDARD 8K x8 SRAMs■ RoHS COMPLIANCE Lead-free components are compliant with the RoHS Directive.
SUMMARY DESCRIPTIONThe M41T81S Serial Access TIMEKEEPER® SRAM is a low power Serial RTC with a built-in 32.768kHz oscillator (external crystal controlled). Eight bytes of the SRAM (see Table 2., page 12) are used for the clock/calendar function and are configured in binary coded decimal (BCD) format. An additional 12 bytes of SRAM provide status/control of Alarm, Watchdog and Square Wave functions. Addresses and data are transferred serially via a two line, bi-directional I2C interface. The built-in address register is incremented automatically after each WRITE or READ data byte.The M41T81S has a built-in power sense circuit which detects power failures and automatically switches to the battery supply when a power failure occurs. The energy needed to sustain the clock operations can be supplied by a small lithium button supply when a power failure occurs. Functions available to the user include a non-volatile, time-of-day clock/calendar, Alarm interrupts, Watchdog Timer and programmable Square Wave output. The eight clock address locations contain the century, year, month, date, day, hour, minute, second and tenths/hundredths of a second in 24 hour BCD format. Corrections for 28, 29 (leap year - valid until year 2100), 30 and 31 day months are made automatically.The M41T81S is supplied in either an 8-pin SOIC or an 18-pin (MY), 300mil SOIC package which in cludes an embedded 32kHz crystal.The 18-pin, embedded crystal SOIC requires only a user-supplied battery to provide non-volatile operation.
FEATURES SUMMARY■ COUNTERS FOR TENTHS/HUNDREDTHS OF SECONDS, SECONDS, MINUTES, HOURS, DAY, DATE, MONTH, YEAR, AND CENTURY■ 32KHz CRYSTAL OSCILLATOR WITH INTEGRATED LOAD CAPACITANCE (12.5pF) WHICH PROVIDES EXCEPTIONAL OSCILLATOR STABILITY AND HIGH CRYSTAL SERIES RESISTANCE OPERATION)■ OSCILLATOR STOP DETECTION (MONITORS CLOCK OPERATION)■ SERIAL INTERFACE SUPPORTS I2C BUS (400kHz PROTOCOL)■ ULTRA-LOW BATTERY SUPPLY CURRENT OF 0.6µA (typ)■ 2.0 TO 5.5V CLOCK OPERATING VOLTAGE■ AUTOMATIC SWITCHOVER AND DESELECT CIRCUITRY (FIXED REFERENCE) WHICH PROVIDES FULL OPERATION IN 3.0V APPLICATIONS) – VCC = 2.7 to 5.5V 2.5V ≤ VPFD ≤ 2.7V■ POWER-DOWN TIME STAMP (HT BIT) WHICH ALLOWS DETERMINATION OF TIME ELAPSED IN BATTERY BACK-UP■ BATTERY LOW FLAG■ PROGRAMMABLE ALARM AND INTERRUPT FUNCTION (valid even during Battery Back-up Mode)■ ACCURATE PROGRAMMABLE WATCHDOG TIMER (from 62.5ms to 128s)■ SOFTWARE CLOCK CALIBRATION (TO COMPENSATE FOR CRYSTAL DEVIATION DUE TO TEMPERATURE)■ OPERATING TEMPERATURE OF –40 TO 85°C■ PACKAGE OPTIONS INCLUDE AN 8-LEAD SOIC OR 18-LEAD EMBEDDED CRYSTAL SOIC
DescriptionThe M48T86 is an industry standard real-time clock (RTC). The M48T86 is composed of a lithium energy source, quartz crystal, write protection circuitry, and a 128-byte RAM array.This provides the user with a complete subsystem packaged in either a 24-pin DIP CAPHAT™ or 28-pin SNAPHAT® SOIC. Functions available to the user include a nonvolatile time-of-day clock, alarm interrupts, a one-hundred-year clock with programmable interrupts, square wave output, and 128 bytes of non-volatile static RAM.The 24-pin, 600 mil DIP CAPHAT houses the M48T86 silicon with a quartz crystal and a long-life lithium button cell in a single package.The 28-pin, 330 mil SOIC provides sockets with gold plated contacts at both ends for direct connection to a separate SNAPHAT® housing containing the battery and crystal. The unique design allows the SNAPHAT battery package to be mounted on top of the SOIC package after the completion of the surface mount process.Insertion of the SNAPHAT housing after reflow prevents potential battery and crystal damage due to the high temperatures required for device surface-mounting. The SNAPHAT housing is keyed to prevent reverse insertion.The SOIC and battery packages are shipped separately in plastic anti-static tubes or in tape & reel form.For the 28-lead SOIC, the battery/crystal package part number is “M4T28-BR12SH” (see Table 20 on page 33).
Features■ Drop-in replacement for PC computer clock/calendar■ Counts seconds, minutes, hours, days, day of the week, date, month, and year with leap year compensation■ Clock accuracy better than ±1 minute per month■ Interfaced with software as 128 RAM locations: – 14 bytes of clock and control registers – 114 bytes of general purpose RAM■ Selectable bus timing (Intel/Motorola)■ Three interrupts are separately software maskable and testable – Time-of-day alarm (once/second to once/day) – Periodic rates from 122 µs to 500 ms – End-of-clock update cycle■ Programmable square wave output■ 10 years of data retention and clock operation in the absence of power■ Self-contained battery and crystal in the CAPHAT™ DIP package■ Packaging includes a 28-lead SOIC and SNAPHAT® top (to be ordered separately)■ SOIC package provides direct connection for a SNAPHAT top contains the battery and crystal■ Pin and function compatible with bq3285/7A and DS12887
HC49-4H crystals share the same base outline as the industry standard HC49 crystal. The crystal uses at AT-cut strip crystal with an hermetically sealed can. HC49-4H crystals provide a low cost source of system clock frequency.
• Low-cost, industry-standard crystal unit
• AT-Cut strip crystal with hermetically sealed can
• Frequency range 1.0MHz to 70MHz
• Package height options available
DESCRIPTIONThe CDCLVC1310 is a highly versatile, low-jitter, low-power clock fanout buffer which can distribute to ten low-jitter LVCMOS clock outputs from one of three inputs, whose primary and secondary inputs can feature differential or single-ended signals and crystal input. Such a buffer is good for use in a variety of mobile and wired infrastructure, data communication, computing, low-power medical imaging, and portable test and measurement applications. When the input is an illegal level, the output is at a defined state. One can set the core to 2.5 V or 3.3 V, and output to 1.5 V, 1.8 V, 2.5 V or 3.3 V. Pin programming easily configures the CDCLVC1310. The overall additive jitter performance is 25 fsRMS (typical). The CDCLVC1310 comes in a small 32-pin 5-mm × 5-mm QFN package.
FEATURES• High-Performance Crystal Buffer With Ultralow Noise Floor of –169 dBc/Hz• Additive Phase Noise/Jitter Performance Is 25 fsRMS (Typ.)• Level Translation With 3.3-V or 2.5-V Core and 3.3-V, 2.5-V, 1.8-V, or 1.5-V Output Supply• Device inputs consist of primary, secondary, and crystal inputs, and manually selectable (through pins) using the input MUX. The primary and secondary inputs can accept LVPECL, LVDS, HCSL, SSTL or LVCMOS signals and crystal input. – Crystal Frequencies Supported Are From 8 MHz to 50 MHz – Differential and Single-Ended Input Frequencies Supported Are up to 200 MHz• 10 Single-Ended LVCMOS Outputs. The outputs can operate at 1.5-V, 1.8-V, 2.5-V or 3.3-V Power-Supply Voltage. – LVCMOS Outputs Operate up to 200 MHz – Output Skew Is 30 ps (Typical) – Total Propagation Delay Is 2 ns (Typical) – Synchronous and Glitch-Free Output Enable Is Available• Offered in QFN-32 5-mm × 5-mm Package With Industrial Temperature Range of –40°C to 85°C• Can Overdrive Crystal Input With LVCMOS Signal up to 50 MHz
APPLICATIONS• Wireless and Wired Infrastructure• Networking and Data Communications• Medical Imaging• Portable Test and Measurement• High-End A/V
descriptionThe Direct Rambus clock generator – lite (DRCG-Lite) is an independent crystal clock generator. It performs clock multiplication using PLL, sourced by an internal crystal oscillator. It provides one differential, high-speed Rambus channel compatible output pair. Also, one single-ended output is available to deliver 1/2 of the crystal frequency. The Rambus channel operates at up to 400 MHz with an option to select 300 MHz as well. The desired crystal is a 18.75-MHz crystal in a series resonance fundamental application.The CDCR61A is characterized for operation over free-air temperatures of 0°C to 85°C. ● 400-MHz Differential Clock Source for Direct Rambus Memory Systems for an 800-MHz Data Transfer Rate● Operates From Two (3.3-V and 1.80-V) Power Supplies With 180 mW (Typ) at 400 MHz Total● Packaged in a Thin Shrink Small-Outline Package (PW)● External Crystal Required for Input