CY74FCT138TQC

更新时间： 2024-09-16 13:07:11

品牌	Logo	应用领域
赛普拉斯 - CYPRESS		解码器
页数	文件大小	规格书
6页	158K
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数据手册

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CY74FCT138TQC 数据手册

1CY54/74FCT138T

fax id: 7013

CY54/74FCT138T

1-of-8 Decoder

Source current 32 mA (Com’l),

Features

12 mA (Mil)

• Function, pinout, and drive compatible with FCT and

F logic

• Dual 1-of-8 decoder with enables

Functional Description

• FCT-C speed at 5.0 ns max. (Com’l),

FCT-A speed at 5.8 ns max. (Com’l)

The FCT138T is a 1-of-8 decoder. The FCT138T accepts

three binary weighted inputs (A , A , A ) and, when enabled,

• Reduced V

(typically = 3.3V) versions of equivalent

FCT functions

provides eight mutually exclusive active LOW outputs

(O –O ). The FCT138T features three enable inputs, two

• Edge-rate control circuitry for significantly improved

noise characteristics

• Power-off disable feature

• ESD > 2000V

• Matched rise and fall times

• Fully compatible with TTL input and output logic levels

• Extended commercial range of −40°C to +85°C

active LOW (E , E ) and one active HIGH (E ).

All inputs will be HIGH unless E and E are LOW and E is

HIGH. This multiple enable function allows easy parallel

expansion of the device to a 1-of-32 (5 lines to 32 lines)

decoder with just four FCT138T devices and one inverter.

The outputs are designed with a power-off disable feature to

allow for live insertion of boards.

• Sink current

64 mA (Com’l),

32 mA (Mil)

Logic Block Diagram

Pin Configurations

E E

2 3

LCC

DIP/SOIC/QSOP

Top View

6 5 4

GND

15 16 17 18

GND

FCT138T–2

FCT138T–3

FCT138T–1

Pin Description

Name

Description

Address Inputs

E −E

Enable Inputs (Active LOW)

Enable Input (Active HIGH)

Outputs

Cypress Semiconductor Corporation

•

3901 North First Street

•

San Jose

•

CA 95134

•

408-943-2600

May 1994 – Revised March 17, 1997

12 3 4 5 6

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