TOSHIBA TC74AC257P, TC74AC257F, TC74AC257FN, TC74AC258P, TC74AC258F Technical data

TC74AC257,258P/F/FN

TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic

TC74AC257P,TC74AC257F,TC74AC257FN

TC74AC258P,TC74AC258F,TC74AC258FN

TC74AC257P/F/FN 2-Channel Multiplexer (3-state)

TC74AC258P/F/FN 2-Channel Multiplexer (3-state,

inverting)

The TC74AC257 and TC74AC258 are advanced high speed
CMOS MULTIPLEXERs fabricated with silicon gate and
double-layer metal wiring C

They achieve the high speed operation similar to equivalent
Bipolar Schottky TTL while maintaining the CMOS low power
dissipation.

Each is composed of four independent 2-channel multiplexers
with common SELECT and

The TC74AC257 is a non-inverting multiplexer, while the
TC74AC258 is an inverting.

OE

If

is set low, the outputs are held in a high-impedance

state. When SELECT is set low, “A” data inputs are enabled.

Conversely, when SELECT is high, “B” data inputs are
enabled.

All inputs are equipped with protection circuits against static
discharge or transient excess voltage.

2

MOS technology.

ENABLEOUTPUT (OE).

Features

• High speed: tpd = 3.6 ns (typ.) at VCC = 5 V

• Low power dissipation: I

• High noise immunity: V

• Symmetrical output impedance: |IOH| = IOL = 24 mA (min)

Capability of driving 50 Ω
transmission lines.

• Balanced propagation delays: t

• Wide operating voltage range: V

• Pin and function compatible with 74F257/258

= 8 μA (max) at Ta = 25°C

CC

NIH

= V

= 28% VCC (min)

NIL

∼

t

−

pLH

pHL

(opr) = 2~5.5 V

CC

Note: xxxFN (JEDEC SOP) is not available in

Japan.

TC74AC257P, TC74AC258P

TC74AC257F, TC74AC258F

TC74AC257FN, TC74AC258FN

Weight
DIP16-P-300-2.54A : 1.00 g (typ.)
SOP16-P-300-1.27A : 0.18 g (typ.)
SOL16-P-150-1.27 : 0.13 g (typ.)

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TC74AC257,258P/F/FN

Pin Assignment

TC74AC257 TC74AC258

IEC Logic Symbol

TC74AC257 TC74AC258

Truth Table

Inputs Outputs

OE SELECT A B Y (257) Y (258)

H X X X Z Z

L L L X L H

L L H X H L

L H X L L H

L H X H H L

X: Don’t care

Z: High impedance

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TC74AC257,258P/F/FN

System Diagram

TC74AC257 TC74AC258

Absolute Maximum Ratings (Note 1)

Characteristics Symbol Rating Unit

Supply voltage range VCC −0.5~7.0 V

DC input voltage VIN −0.5~VCC + 0.5 V

DC output voltage V

Input diode current IIK ±20 mA

Output diode current IOK ±50 mA

DC output current I

DC VCC/ground current ICC ±100 mA

Power dissipation PD 500 (DIP) (Note 2)/180 (SOP) mW

Storage temperature T

Note 1: Exceeding any of the absolute maximum ratings, even briefly, lead to deterioration in IC performance or

even destruction.
Using continuously under heavy loads (e.g. the application of high temperature/current/voltage and the
significant change in temperature, etc.) may cause this product to decrease in the reliability significantly
even if the operating conditions (i.e. operating temperature/current/voltage, etc.) are within the absolute
maximum ratings and the operating ranges.
Please design the appropriate reliability upon reviewing the Toshiba Semiconductor Reliability Handbook
(“Handling Precautions”/Derating Concept and Methods) and individual reliability data (i.e. reliability test
report and estimated failure rate, etc).

−0.5~VCC + 0.5 V

OUT

±50 mA

OUT

−65~150 °C

stg

Note 2: 500 mW in the range of Ta = −40~65°C. From Ta = 65 to 85°C a derating factor of −10 mW/°C should be

applied up to 300 mW.

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