74AC138MTR datasheet(1/10 Pages) STMICROELECTRONICS

Part #	74AC138MTR

Description	3 TO 8 LINE DECODER (INVERTING)

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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April 2001

s

HIGH SPEED: tPD = 4.5ns (TYP.) at VCC = 5V

s

LOW POWER DISSIPATION:

ICC = 4µA(MAX.) at TA=25°C

s

HIGH NOISE IMMUNITY:

VNIH = VNIL = 28 % VCC (MIN.)

s

50

Ω TRANSMISSION LINE DRIVING

CAPABILITY

s

SYMMETRICAL OUTPUT IMPEDANCE:

|IOH| = IOL = 24mA (MIN)

s

BALANCED PROPAGATION DELAYS:

tPLH ≅ tPHL

s

OPERATING VOLTAGE RANGE:

VCC (OPR) = 2V to 6V

s

PIN AND FUNCTION COMPATIBLE WITH

74 SERIES 138

s

IMPROVED LATCH-UP IMMUNITY

DESCRIPTION

The 74AC138 is an advanced high-speed CMOS

3 TO 8 LINE DECODER (INVERTING) fabricated

with sub-micron silicon gate and double-layer

metal wiring C2MOS tecnology.

If the device is enabled, 3 binary select inputs (A,

B, and C) determine which one of the outputs will

go low. If enable input G1 is held low or either G2A

or G2B is held high, the decoding function is

inhibited and all the 8 outputs go to high.

Tree enable inputs are provided to ease cascade

connection and application of address decoders

for memory systems.

All

inputs

and

outputs

are

equipped

with

protection circuits against static discharge, giving

them 2KV ESD immunity and transient excess

voltage.

74AC138

3 TO 8 LINE DECODER (INVERTING)

PIN CONNECTION AND IEC LOGIC SYMBOLS

ORDER CODES

PACKAGE

TUBE

T & R

DIP

74AC138B

SOP

74AC138M

74AC138MTR

TSSOP

74AC138TTR

TSSOP

DIP

SOP

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74AC138MTR Datasheet(PDF) 1 Page - STMicroelectronics

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