74VHC123AMSCX Fairchild Semiconductor, 74VHC123AMSCX Datasheet

74VHC123AMSCX

Manufacturer Part Number

74VHC123AMSCX

Description

Dual Retriggerable Monastable Multivibrator

Manufacturer

Fairchild Semiconductor

Datasheet

1.74VHC123AMSCX.pdf (9 pages)

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74VHC123AM

74VHC123ASJ

74VHC123AMTC

74VHC123AN

74VHC123A

Dual Retriggerable Monostable Multivibrator

General Description

The VHC123A is an advanced high speed CMOS

Monostable Multivibrator fabricated with silicon gate CMOS

technology. It achieves the high speed operation similar to

equivalent Bipolar Schottky TTL while maintaining the

CMOS low power dissipation. Each multivibrator features

both a negative, A, and a positive, B, transition triggered

input, either of which can be used as an inhibit input. Also

included is a clear input that when taken low resets the

one-shot. The VHC123A can be triggered on the positive

transition of the clear while A is held low and B is held high.

The output pulse width is determined by the equation:

C is in farads.

Limits for R

Ordering Code:

Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Logic Symbol

Order Number

External capacitor, C

External resistors, R

3.0V, 1 k

)(C

and C

); where PW is in seconds, R is in ohms, and

Package Number

min

are:

MTC16

IEEE/IEC

M16A

M16D

N16E

No limit

2.0V, 5 k

16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow

16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide

16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide

min

DS011621.prf

An input protection circuit ensures that 0 to 7V can be

applied to the input pins without regard to the supply volt-

age. This device can be used to interface 5V to 3V systems

and two supply systems such as battery back up. This cir-

cuit prevents device destruction due to mismatched supply

and input voltages.

Features

Connection Diagram

High Speed:

Low Power Dissipation:

Active State: I

High Noise Immunity: V

Power down protection is provided on all inputs

Pin and function compatible with 74HC123A

Package Description

8.1 ns (typ) at T

4 A (Max) at T

600 A (Max) at T

NIH

25 C

July 1993

Revised April 1999

NIL

28% V

www.fairchildsemi.com

25 C

(min)

Related parts for 74VHC123AMSCX

74VHC123AMSCX Summary of contents

Page 1

... Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Logic Symbol IEEE/IEC © 1999 Fairchild Semiconductor Corporation An input protection circuit ensures that can be applied to the input pins without regard to the supply volt- age ...

Page 2

Pin Descriptions Pin Names Description A Trigger Inputs (Negative Edge) B Trigger Inputs (Positive Edge) CLR Reset Inputs C External Capacitor x R External Resistor Outputs Block Diagrams Note are external ...

Page 3

Timing Chart Functional Description 1. Stand-by State The external capacitor ( fully charged the Stand-by State. That means, before triggering, the Q and Q transistors which are connected to the node ...

Page 4

Absolute Maximum Ratings Supply Voltage ( Input Voltage ( Output Voltage (V ) OUT Input Diode Current ( Output Diode Current ( Output Current (I ) OUT DC V ...

Page 5

AC Electrical Characteristics V CC Symbol Parameter (V) t Propagation Delay Time 3.3 0.3 PLH t PHL (A, B–Q, Q) 5.0 0.5 t Propagation Delay Time 3.3 0.3 PLH t PHL (CLR Trigger— 5.0 0.5 t Propagation Delay ...

Page 6

Device Characteristics t *C Characteristics (typ) wout x Output Pulse Width Constant K-Supply Voltage (Typical) www.fairchildsemi.com t *V Characteristics (typ Input Equivalent Circuit 6 ...

Page 7

Physical Dimensions inches (millimeters) unless otherwise noted 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M16A Package Number M16D 7 www.fairchildsemi.com ...

Page 8

Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide www.fairchildsemi.com Package Number MTC16 8 ...

Page 9

Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN ...

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