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Part Name(s) : 74ACT257B 74ACT257M 74ACT257MTR 74ACT257TTR 74ACT257 ST-Microelectronics
STMicroelectronics
Description : QUAD 2 CHANNEL MULTIPLEXER (3-STATE) View

DESCRIPTION
The 74ACT257 is an advanced high-speed CMOS QUAD 2-CHANNEL MULTIPLEXER (3-STATE) fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS tecnology. It is composed of an independent 2-CHANNEL MULTIPLEXER with common SELECT and ENABLE (OE)inputs. It is a non-inverting MULTIPLEXER. When the ENABLE input is held HIGH, the outputs are forced to a high impedance state. When the SELECT input is held LOW, "A" data is selected; when SELECT input is held HIGH, "B" data is selected.

■ HIGH SPEED: tPD = 5 ns (TYP.) at VCC = 5V
■ LOW POWER DISSIPATION: ICC = 4 µA(MAX.) at TA=25°C
■ COMPATIBLE WITH TTL OUTPUTS VIH = 2V (MIN.), VIL = 0.8V (MAX.)
■ 50Ω TRANSMISSION LINE DRIVING CAPABILITY
■ SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 24mA (MIN)
■ BALANCED PROPAGATION DELAYS: tPLH ≅ tPHL
■ OPERATING VOLTAGE RANGE: VCC (OPR) = 4.5V to 5.5V
■ PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 257
■ IMPROVED LATCH-UP IMMUNITY

Part Name(s) : HC257 Toshiba
Toshiba
Description : QUAD 2-CHANEL MULTIPLEXER (3-STATE) View

QUAD 2-CHANEL MULTIPLEXER (3-STATE)

Part Name(s) : MC74ACT258 MC74ACT258N MC74ACT258D Motorola
Motorola => Freescale
Description : QUAD 2-Input MULTIPLEXER with 3-STATE Outputs View

The MC74AC258/74ACT258 is a QUAD 2-input MULTIPLEXER with 3-STATE outputs.
Four bits of data from two sources can be selected using a common data select input. The four outputs present the selected data in the complement (inverted) form. The outputs may be switched to a high impedance state with a HIGH on the common Output Enable (OE) input, allowing the outputs to interface directly with bus-oriented systems.

MULTIPLEXER Expansion by Tying Outputs Together
• Inverting 3-STATE Outputs
• Outputs Source/Sink 24 mA
• ′ACT258 Has TTL Compatible Inputs

Part Name(s) : M74HC257B1R M74HC257M1R M74HC257RM13TR M74HC257TTR M74HC257 STMICROELECTRONICS
STMicroelectronics
Description : QUAD 2 CHANNEL MULTIPLEXER (3-STATE) View

DESCRIPTION
The M74HC257 is an high speed CMOS QUAD 2 CHANNEL MULTIPLEXER (3-STATE) fabricated with silicon gate C2MOS technology.

■ HIGH SPEED : tPD = 11 ns (TYP.) at VCC = 6V
■ LOW POWER DISSIPATION: ICC =4µA(MAX.) at TA=25°C
■ HIGH NOISE IMMUNITY: VNIH = VNIL = 28 % VCC (MIN.)
■ SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 6mA (MIN)
■ BALANCED PROPAGATION DELAYS: tPLH ≅ tPHL
■ WIDE OPERATING VOLTAGE RANGE: VCC (OPR) = 2V to 6V
■ PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 257


Part Name(s) : 74VHC257 74VHC257M 74VHC257T STMICROELECTRONICS
STMicroelectronics
Description : QUAD 2 CHANNEL MULTIPLEXER (3-STATE) View

DESCRIPTION
The 74VHC257 is an advanced high-speed CMOS QUAD 2 CHANNEL MULTIPLEXER (3-STATE) fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology.

■ HIGH SPEED: tPD = 3.7 ns (TYP.) at VCC =5V
■ LOWPOWER DISSIPATION: ICC = 4 µA (MAX.) at TA = 25 °C
■ HIGH NOISE IMMUNITY: VNIH = VNIL = 28%VCC (MIN.)
■ POWER DOWN PROTECTION ON INPUTS
■ SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 8 mA (MIN)
■ BALANCEDPROPAGATIONDELAYS: tPLH ≅ tPHL
■ OPERATINGVOLTAGERANGE: VCC (OPR) = 2V to 5.5V
■ PIN AND FUNCTION COMPATIBLE WITH 74 SERIES257
■ IMPROVEDLATCH-UP IMMUNITY
■ LOWNOISE VOLP = 0.8V (Max.)

Part Name(s) : HC257 ST-Microelectronics
STMicroelectronics
Description : QUAD 2 CHANNEL MULTIPLEXER (3-STATE) View

DESCRIPTION
The 74VHC257 is an advanced high-speed CMOS QUAD 2-CHANNEL MULTIPLEXER (3-STATE) fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology.

■ HIGH SPEED: tPD = 3.7ns (TYP.) at VCC = 5V
■ LOW POWER DISSIPATION: ICC = 4 µA (MAX.) at TA=25°C
■ HIGH NOISE IMMUNITY: VNIH = VNIL = 28% VCC (MIN.)
■ POWER DOWN PROTECTION ON INPUTS
■ SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 8mA (MIN)
■ BALANCED PROPAGATION DELAYS: tPLH ≅ tPHL
■ OPERATING VOLTAGE RANGE: VCC(OPR) = 2V to 5.5V
■ PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 257
■ IMPROVED LATCH-UP IMMUNITY
■ LOW NOISE: VOLP = 0.8V (MAX.)

Part Name(s) : 54LS257 SN74LS257D SN74LS257N Motorola
Motorola => Freescale
Description : QUAD 2-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS View

QUAD 2-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS

TheLSTTL/MSI SN54/74LS257B and the SN54/74LS258B are QUAD 2-InputMULTIPLEXERs with 3-STATE outputs. Four bits of data from twosources canbe selected using a Common Data Select input. The four outputs present the selected data in true (non-inverted) form. The outputs may be switched to ahigh impedance state with a HIGH on the common Output Enable (EO) In put,allowing the outputs to interface directly with bus oriented systems. It is fabricatedwith the Schottky barrier diode process for high speedand is completely compatible with all Motorola TTL families.

• Schottky Process For High Speed
MULTIPLEXER Expansion By Tying Outputs Together
• Non-Inverting 3-STATE Outputs
• Input Clamp Diodes Limit High Speed Termination Effects
• Special Circuitry Ensures Glitch Free Multiplexing
• ESD > 3500 Volts

Part Name(s) : M74HC258 M74HC258B1R M74HC258M1R M74HC258RM13TR M74HC258TTR STMICROELECTRONICS
STMicroelectronics
Description : QUAD 2 CHANNEL MULTIPLEXER (3-STATE, INVERTING) View

DESCRIPTION
The M74HC258 is an high speed CMOS QUAD 2 CHANNEL MULTIPLEXER (3-STATE) fabricated with silicon gate C2MOS technology.

■ HIGH SPEED : tPD = 11 ns (TYP.) at VCC = 6V
■ LOW POWER DISSIPATION: ICC =4µA(MAX.) at TA=25°C
■ HIGH NOISE IMMUNITY: VNIH = VNIL = 28 % VCC (MIN.)
■ SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 6mA (MIN)
■ BALANCED PROPAGATION DELAYS: tPLH ≅ tPHL
■ WIDE OPERATING VOLTAGE RANGE: VCC (OPR) = 2V to 6V
■ PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 258

Part Name(s) : MC74F257AJ MC74F257AN MC74F257AD MC74F257A Motorola
Motorola => Freescale
Description : QUAD 2-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS View

The MC74F257 is a QUAD 2-input MULTIPLEXER with 3-STATE outputs. Four bits of data from two sources can be selected using a common Data Select input. The four outputs present the selected data in true (non-inverted) form. The outputs may be switched to a high impedance state with a HIGH on the common Output Enable (OE) input, allowing the outputs to interface directly with bus oriented systems.

MULTIPLEXER Expansion by Tying Outputs Together
• Non-Inverting 3-STATE Outputs
• Input Clamp Diodes Limit High-Speed Termination Effects
• AC Enhanced Version of the F257

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