TC74LVX138F/FN/FT

2007-10-17

1

TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic

TC74LVX138F,TC74LVX138FN,TC74LVX138FT

3-to-8 Line Decoder

The TC74LVX138F/ FN/ FT is a high-speed CMOS 3-to-8 line

decoder fabricated with silicon gate CMOS technology. Designed

for use in 3-V systems, it achieves high-speed operation while

maintaining the CMOS low power dissipation.

This device is suitable for low-voltage and battery operated

systems.

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

C) determine which one of the outputs ( 0

Y - 7

Y ) will go low.

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 high.

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 5.5V can be

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

This device can be used to interface 5V to 3V 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 provided on all inputs

• Pin and function compatible with 74HC138

Note:

xxxFN (JEDEC SOP) is not available in

Japan.

TC74LVX138F

TC74LVX138FN

TC74LVX138FT

Weight

SOP16-P-300-1.27A

: 0.18 g (typ.)

SOL16-P-150-1.27

: 0.12 g (typ.)

TSSOP16-P-0044-0.65A

: 0.06 g (typ.)