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Part Name(s) : SN74LS221 SN74LS221D SN74LS221N SN74LS221M SN74LS221ML1 SN74LS221ML2 ON-Semiconductor
ON Semiconductor
Description : Dual MONOSTABLE MULTIVIBRATORS WITH Schmitt−Trigger INPUTS View

Dual MONOSTABLE MULTIVIBRATORS WITH SCHMITT-TRIGGER INPUTS

• SN74LS221 is a Dual Highly Stable One-Shot
• Overriding Clear Terminates Output Pulse
• Pin Out is Identical to SN74LS123

Part Name(s) : 54LS221 74LS221 Motorola
Motorola => Freescale
Description : DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT-TRIGGER INPUTS View

DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT-TRIGGER INPUTS
LOW POWER SCHOTTKY

• SN54LS221 and SN74LS221 is a Dual Highly Stable One-Shot
• Overriding Clear Terminates Output Pulse
• Pin Out is Identical to SN54/74LS123

Part Name(s) : 74LS221N SN54LS221 SN54LS221J SN74LS221 SN74LS221D SN74LS221N Motorola
Motorola => Freescale
Description : DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT-TRIGGER INPUTS View

DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT-TRIGGER INPUTS

Each multivibrator of the LS221 features a negative-transition-triggered input and a positive-transition-triggered inputeither of which can be used as an inhibit input.
Pulse triggering occurs at a voltage level and is not related to the transition time of the input pulse. SCHMITT-TRIGGER input circuitry for B input allows jitter-free triggering for INPUTS as slow as 1 volt/second, providing the circuit WITH excellent noise immunity. A high immunity to VCC noise is also provided by internal latching circuitry.

• SN54LS221 and SN74LS221 is a Dual Highly Stable One-Shot
• Overriding Clear Terminates Output Pulse
• Pin Out is Identical to SN54/74LS123

 

Part Name(s) : SN74LS221D SN74LS221DR2 SN74LS221N SN74LS221 ONSEMI
ON Semiconductor
Description : Dual MONOSTABLE MULTIVIBRATORS WITH Schmitt−Trigger INPUTS View

Each multivibrator of the LS221 features a negative-transitiontriggered input and a positive-transition-triggered input either of which can be used as an inhibit input.
Pulse triggering occurs at a voltage level and is not related to the transition time of the input pulse. SCHMITT-TRIGGER input circuitry for B input allows jitter-free triggering for INPUTS as slow as 1 volt/second, providing the circuit WITH excellent noise immunity. A high immunity to VCC noise is also provided by internal latching circuitry.

• SN74LS221 is a Dual Highly Stable One-Shot
• Overriding Clear Terminates Output Pulse
• Pin Out is Identical to SN74LS123


Part Name(s) : 74221 74HC221 74HC221D 74HC221DB 74HC221N 74HCT221 74HCT221D 74HCT221N Philips
Philips Electronics
Description : Dual MONOSTABLE MULTIVIBRATORS (WITH Schmitt Trigger Input) View

The 74HC/HCT221 are high-speed Si-gate CMOS devices and are pin compatible WITH low power Schottky TTL (LSTTL). They are specified in compliance WITH JEDEC standard no. 7A.

The 74HC/HCT221 are dual non-retriggerable MONOSTABLE MULTIVIBRATORS. Each multivibrator features an active LOW-going edge input (nA) and an active HIGH-going edge input (nB), either of which can be used as an enable input.

 

1. Pulse width variance is typically less than±5%
2. Pin-out identical to “123”
3. Overriding reset terminates output pulse
4. nB INPUTS have hysteresis for improved noise immunity
5. Output capability: standard (except for nREXT/CEXT)
6. ICCcategory: MSI

Part Name(s) : 74221 74HC221 74HC221D 74HC221D,652 74HC221D,653 74HC221DB 74HC221DB,112 74HC221DB,118 74HC221N 74HCT221 74HCT221D 74HCT221N NXP
NXP Semiconductors.
Description : Dual MONOSTABLE MULTIVIBRATORS (WITH Schmitt Trigger Input) View

The 74HC/HCT221 are high-speed Si-gate CMOS devices and are pin compatible WITH low power Schottky TTL (LSTTL). They are specified in compliance WITH JEDEC standard no. 7A.

The 74HC/HCT221 are dual non-retriggerable MONOSTABLE MULTIVIBRATORS. Each multivibrator features an active LOW-going edge input (nA) and an active HIGH-going edge input (nB), either of which can be used as an enable input.

 

 

1. Pulse width variance is typically less than±5%
2. Pin-out identical to “123”
3. Overriding reset terminates output pulse
4. nB INPUTS have hysteresis for improved noise immunity
5. Output capability: standard (except for nREXT/CEXT)
6. ICCcategory: MSI

Part Name(s) : HD74LS123 Hitachi
Hitachi -> Renesas Electronics
Description : Dual Retriggerable MONOSTABLE MULTIVIBRATORS (WITH Clear) View

Dual Retriggerable MONOSTABLE MULTIVIBRATORS (WITH Clear)

Part Name(s) : HEF4093B HEF4093BT HEC4093BT,112 HEC4093BT,118 HEF4093BT-Q118 HEF4093BT/AUJ NXP
NXP Semiconductors.
Description : Quad 2-input NAND Schmitt trigger View

General description
The HEF4093B is a quad two-input NAND gate. Each input has a Schmitt trigger circuit. The gate switches at different points for positive-going and negative-going signals. The difference between the positive voltage (VT+) and the negative voltage (VT) is defined as hysteresis voltage (VH).

Features and benefits
■ Schmitt trigger input discrimination
■ Fully static operation
■ 5 V, 10 V, and 15 V parametric ratings
■ Standardized symmetrical output characteristics
■ Specified from -40 °C to +85 °C and -40 °C to +125 °C
■ Complies WITH JEDEC standard JESD 13-B

Applications
■ Wave and pulse shapers
■ Astable MULTIVIBRATORS
MONOSTABLE MULTIVIBRATORS

Part Name(s) : CD4093BCCW Fairchild
Fairchild Semiconductor
Description : Quad 2-Input NAND Schmitt Trigger View

General Description
The CD4093B consists of four SCHMITT-TRIGGER circuits. Each circuit functions as a 2-input NAND gate WITH Schmitt trigger action on both INPUTS. The gate switches at different points for positive and negative-going signals. The difference between the positive (VT+) and the negative voltage (VT−) is defined as hysteresis voltage (VH).
All outputs have equal source and sink currents and conform to standard B-series output drive (see Static Electrical Characteristics).

Features
■ Wide supply voltage range: 3.0V to 15V
SCHMITT-TRIGGER on each input WITH no external components
■ Noise immunity greater than 50%
■ Equal source and sink currents
■ No limit on input rise and fall time
■ Standard B-series output drive
■ Hysteresis voltage (any input) TA = 25°C
   Typical
      VDD = 5.0V VH = 1.5V
      VDD = 10V VH = 2.2V
      VDD = 15V VH = 2.7V
   Guaranteed
      VH = 0.1 VDD
     
Applications
• Wave and pulse shapers
• High-noise-environment systems
MONOSTABLE MULTIVIBRATORS
• Astable MULTIVIBRATORS
• NAND logic

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