TC74HC4520AF(EL,F)

更新时间： 2024-09-23 13:14:27

品牌	Logo	应用领域
东芝 - TOSHIBA		计数器触发器逻辑集成电路光电二极管
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9页	337K
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TC74HC4520AF(EL,F) 数据手册

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TC74HC4520AP/AF

TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic

TC74HC4520AP,TC74HC4520AF

Dual 4-Bit Binary Counter

The TC74HC4520A is high speed CMOS DUAL BCD/4-BIT

BINARY COUNTER fabricated with silicon gate C²MOS

TC74HC4520AP

technology.

It achieves the high speed operation similar to equivalent

LSTTL while maintaining the CMOS low power dissipation.

Since it contains two independent counter circuits in one

package, counting or frequency division of eight binary bits can

be achieved with one device. The counter is reset to “O” (Q0 to Q3

low) by setting the CLR input high regardless of the other inputs.

Counting occurs on the positive going (rising edge) transition of

CK if CE is high or the negative going (falling edge) transition of

CK if CE is low.

TC74HC4520AF

All inputs are equipped with protection circuits against static

discharge or transient excess voltage.

Features

•

High speed: f

= 55 MHz (typ.) at V

= 5 V

max

Low power dissipation: I

= 4 μA (max) at Ta = 25°C

High noise immunity: V

= V

= 28% V

(min)

NIH

NIL

Weight

DlP16-P-300-2.54A

SOP16-P-300-1.27A

Outputs drive capability: 10 LSTTL loads

Symmetrical output impedance: |I | = I

: 1.00 g (typ.)

: 0.18 g (typ.)

= 4 mA (min)

∼

−

Balanced propagation delays: t

pHL

pLH

Wide operating voltage range: V

(opr) = 2 to 6 V

Pin and function compatible with TC4520B

Pin Assignment

2007-10-01

12 3 4 5 6 7...9

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