HD74AC123AFP 查看數據表（PDF） - Renesas Electronics

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HD74AC123AFP

Dual Retriggerable Resettable Multivibrator

Renesas Electronics 

HD74AC123A

Dual Retriggerable Resettable Multivibrator

REJ03D0245–0200Z

(Previous ADE-205-365 (Z))

Rev.2.00

Jul.16.2004

Description

Each half of the HD74AC123A features retriggerable capability, complementary dc level triggering and overriding

Direct Clear. When a circuit is in the quasi-stable (delay) state, another trigger applied to the inputs (per the Truth

Table) will cause the delay period to start again, without disturbing the outputs. By repeating this process, the output

pulse period (Q High, Q Low) can be made as long as desired. Alternatively, a delay period can be terminated at any

time by a Low signal on CD, which also inhibits triggering. An internal connection from CD to the input gate makes it

possible to trigger the circuit by a positive-going signal on CD, as shown in the Truth Table. For timing capacitor values

greater than 1000 pF, the output pulse width is defined as follows.

Where tw is in ns, RX is in kΩ and CX is in pF.

tw = RXCX

Features

• Outputs Source/Sink 24 mA

• Ordering Information

Part Name

Package Type Package Code Package Abbreviation Taping Abbreviation (Quantity)

HD74AC123AP DIP-16 pin

DP-16E, -16FV P

—

HD74AC123AFPEL SOP-16 pin (JEITA) FP-16DAV

FP

EL (2,000 pcs/reel)

HD74AC123ARPEL SOP-16 pin (JEDEC) FP-16DNV

RP

EL (2,500 pcs/reel)

Notes: 1. Please consult the sales office for the above package availability.

2. The packages with lead-free pins are distinguished from the conventional products by adding V at the end of

the package code.

Pin Arrangement

A1 1

B1 2

CD1 3

Q1 4

Q2 5

CX2 6

RX2CX2 7

GND 8

(Top view)

16 VCC

15 RX1CX1

14 CX1

13 Q1

12 Q2

11 CD2

10 B2

9 A2

Rev.2.00, Jul.16.2004, page 1 of 6

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