HD74HC590 查看數據表（PDF） - Renesas Electronics

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HD74HC590

8-bit Binary Counter/Register (with 3-state outputs)

Renesas Electronics 

HD74HC590

Test Circuit

VCC

Input

Pulse Generator

Zout = 50 Ω

Input

Pulse Generator

Zout = 50 Ω

VCC

Output

QA to QH

CCKEN

CCK

Output

CCLR RCO

RCK

G

Note : 1. CL includes probe and jig capacitance.

1 k Ω S1

CL = 50 pF

OPEN

GND

VCC

1 k Ω S1

CL = 50 pF

TEST

tPLH / t PHL

tZH/ t HZ

tZL / t LZ

OPEN

GND

VCC

S1

OPEN

GND

VCC

Waveforms

• Waveform – 1 (CCK to RCO)

tr

tf

90 %

VCC

Input CCK

50 % 50 %

50 %

10 %

tw(H)

10 %

tw(L)

0V

tPHL

tPLH

90 %

90 %

VOH

Output RCO

50 %

50 %

10 %

10 %

VOL

tTHL

tTLH

Note : 1. Input waveform : PRR ≤ 1 MHz, duty cycle 50%, tr ≤ 6 ns, tf ≤ 6 ns

• Waveform – 2 (CCLR to RCO, CCLR to CCK)

tf

tr

Input D

90 %

50 %

90 %

VCC

50 %

10 %

10 %

0V

tW

tPLH

90 %

VOH

Output RCO

50 %

10 %

tTLH

VOL

trem

90 %

VOH

Output CCK

50 %

10 %

VOL

tTLH

Note : 1. Input waveform : PRR ≤ 1 MHz, duty cycle 50%, tr ≤ 6 ns, tf ≤ 6 ns

Rev.2.00 Mar 30, 2006 page 6 of 9

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