HD74HCT237 查看數據表（PDF） - Renesas Electronics

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HD74HCT237

3-to-8-line Decoder/Demultiplexer with Address Latch

Renesas Electronics 

HD74HCT237

Switching Characteristics

Item

Symbol VCC (V)

Propagation delay time tPLH

4.5

tPHL

4.5

tPLH

4.5

tPHL

4.5

tPLH

4.5

tPHL

4.5

tPLH

4.5

tPHL

4.5

Pulse width

tw

4.5

Setup time

tsu

4.5

Hold time

th

4.5

Output rise/fall time

tTLH

4.5

tTHL

Input capacitance

Cin

—

Ta = 25°C

Min Typ Max

— 21 37

— 25 37

— 18 29

— 14 29

— 16 29

— 18 29

— 22 38

— 27 38

16 8 —

20 6 —

5 –1 —

— 5 15

Ta = –40 to +85°C

Min Max

—

46

—

46

—

36

—

36

—

36

—

36

—

48

—

48

20

—

25

—

5

—

—

19

— 5 10

—

10

(CL = 50 pF, Input tr = tf = 6 ns)

Unit

Test Conditions

ns A, B or C to Y

ns G2 to Y

ns G1 to Y

ns GL to Y

ns

ns

ns

ns

pF

Test Circuit

VCC

VCC

Input

Pulse Generator

Zout = 50 Ω

Input

Pulse Generator

Zout = 50 Ω

A

Output

B

Y0

C

CL = 50 pF

GL

Output

G2

Y7

G1

CL = 50 pF

Note : 1. CL includes probe and jig capacitance.

Rev.2.00 Mar 30, 2006 page 4 of 7

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