TC74VHC238F/FT/FK

2012-02-29

1

TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic

TC74VHC238F,TC74VHC238FT,TC74VHC238FK

3-to-8 Line Decoder

The TC74VHC238 is an advanced high speed CMOS 3-to-8

It achieves the high speed operation similar to equivalent

Bipolar Schottky TTL while maintaining the CMOS low power

dissipation.

When the device is enabled, 3 Binary Select inputs (A, B and C)

determine which one of the outputs (Y0-Y7) will go High.

When enable input G1 is held low or either

A

2

G

or

2B

G

is

held high, decoding function is inhibited and all outputs go Low.

G1

A

2

G

, and

2B

G

inputs are provided to ease cascade

connection and for use as an address decoder for memory

systems.

An input protection circuit ensures that 0 to 5.5 V can be

applied to the input pins without regard to the supply voltage.

This device can be used to interface 5 to 3 V systems and two

supply systems such as battery back up. This circuit prevents

device destruction due to mismatched supply and input voltages.

Features

• Power down protection is provided on all inputs.

• Pin and function compatible with 74ALS238

Weight

SOP16-P-300-1.27A

: 0.18 g (typ.)

TSSOP16-P-0044-0.65A

: 0.06 g (typ.)

VSSOP16-P-0030-0.50

: 0.02 g (typ.)

TC74VHC238F

TC74VHC238FT

TC74VHC238FK