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Part Name(s) : M54HC257 M54HC257F1R M54HC258 M54HC258R1R M74HC257 M74HC257B1R M74HC257C1R M74HC257F1R M74HC258F1R M74HC257M1R ST-Microelectronics
STMicroelectronics
Description : HC258 QUAD 2 CHANNEL MULTIPLEXER (3-STATE, INVERTING) HC257 QUAD 2 CHANNEL MULTIPLEXER (3-STATE) View

DESCRIPTION
The M54/74HC257 and the M54/74HC258 are high speed CMOS MULTIPLEXERs fabricated with silicon gate C2MOS technology.
They have the same high speed performance ofLSTTL combined with true CMOS low power consumption.

■ HIGH SPEED tPD = 10 ns (TYP.) at VCC = 5 V
■ LOW POWER DISSIPATION ICC = 4 µA (MAX.) at TA = 25 °C
■ HIGH NOISE IMMUNITY VNIH = VNIL = 28 % VCC (MIN.)
■ OUTPUT DRIVE CAPABILITY 15 LSTTL LOADS
■ SYMMETRICAL OUTPUT IMPEDANCE IOH = IOL = 6 mA (MIN.)
■ BALANCED PROPAGATION DELAYS tPLH = tPHL
■ WIDE OPERATING VOLTAGE RANGE VCC (OPR) = 2 V to 6 V
■ PIN AND FUNCTION COMPATIBLE WITH 54/74LS257/258

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

QUAD 2-CHANEL MULTIPLEXER (3-STATE)

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) : CD54HC258 CD54HCT258 CD74HC258 CD74HCT258 CD74HC258M CD74HCT258M CD74HC258E CD74HCT258E TI
Texas Instruments
Description : High-Speed CMOS Logic QUAD 2-Input MULTIPLEXER with 3-STATE INVERTING Outputs View

High-Speed CMOS Logic QUAD 2-Input MULTIPLEXER with 3-STATE INVERTING Outputs


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) : 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) : 74F258A 74F258ASC 74F258ASJ 74F258ASCX 74F258ASJX 74F258APC Fairchild
Fairchild Semiconductor
Description : QUAD 2-Input MULTIPLEXER with 3-STATE Outputs View

General Description
The 74F258A 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.

Features
MULTIPLEXER expansion by tying outputs together
INVERTING 3-STATE outputs

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

Part Name(s) : 74F257A 74F257ASC 74F257ASJ 74F257ASCX 74F257ASJX 74F257APC Fairchild
Fairchild Semiconductor
Description : QUAD 2-Input MULTIPLEXER with 3-STATE Outputs View

General Description
The 74F257A 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.

Features
MULTIPLEXER expansion by tying outputs together
■ Non-INVERTING 3-STATE outputs
■ Input clamp diodes limit high-speed termination effects

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