74VHCT139A 查看數據表（PDF） - STMicroelectronics

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74VHCT139A

DUAL 2 TO 4 DECODER/DEMULTIPLEXER

STMicroelectronics 

74VHCT139A

DUAL 2 TO 4 DECODER/DEMULTIPLEXER

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

s LOW POWER DISSIPATION:

ICC = 2 µA (MAX.) at TA=25°C

s COMPATIBLE WITH TTL OUTPUTS:

VIH = 2V (MIN.), VIL = 0.8V (MAX)

s POWER DOWN PROTECTION ON INPUTS

& OUTPUTS

s SYMMETRICAL OUTPUT IMPEDANCE:

|IOH| = IOL = 8 mA (MIN)

s BALANCED PROPAGATION DELAYS:

tPLH ≅ tPHL

s OPERATING VOLTAGE RANGE:

VCC(OPR) = 4.5V to 5.5V

s PIN AND FUNCTION COMPATIBLE WITH

74 SERIES 139

s IMPROVED LATCH-UP IMMUNITY

DESCRIPTION

The 74VHCT139A is an advanced high-speed

CMOS DUAL 2 TO 4 LINE DECODER/

DEMULTIPLEXER fabricated with sub-micron

silicon gate and double-layer metal wiring C2MOS

technology.

The active low enable input can be used for gating

or as a data input for demultiplexing applications.

When the enable input is held high, all four outputs

are high independently of the other inputs.

SOP

TSSO P

ORDER CODES

PACKAGE

TUBE

T &R

SOP

TSSOP

74VHCT139AM 74VHCT139AMTR

74VHCT139ATTR

Power down protection is provided on all inputs

and outputs and 0 to 7V can be accepted on

inputs with no regard to the supply voltage. This

device can be used to interface 5V to 3V since all

inputs are equipped with TTL threshold.

All inputs and outputs are equipped with

protection circuits against static discharge, giving

them 2KV ESD immunity and transient excess

voltage.

PIN CONNECTION AND IEC LOGIC SYMBOLS

June 2001

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