74vhc221a Fairchild Semiconductor, 74vhc221a Datasheet

74vhc221a

Manufacturer Part Number

74vhc221a

Description

Dual Non-retriggerable Monostable Multivibrator

Manufacturer

Fairchild Semiconductor

Datasheet

1.74VHC221A.pdf (9 pages)

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74VHC221AM

74VHC221ASJ

74VHC221AMTC

74VHC221AN

74VHC221A

Dual Non-Retriggerable Monostable Multivibrator

General Description

The VHC221A 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 VHC221A can be triggered on the positive

transition of the clear while A is held LOW and B is held

HIGH. The VHC221A is non-retriggerable, and therefore

cannot be retriggered until the output pulse times out. The

output pulse width is determined by the equation:

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

and C is in farads.

(Rx)(Cx); where PW is in seconds, R is in ohms,

Package Number

MTC16

IEEE/IEC

M16A

M16D

N16E

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

DS011680.prf

Limits for R

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

External capacitor, C

External resistors, R

High Speed: t

Low Power Dissipation: I

Active State: I

High Noise Immunity: V

Power down protection is provided on all inputs

Pin and function compatible with 74HC221A

Package Description

and C

3.0V, 1 k

are:

8.1 ns (typ) at V

600 A (Max) at T

: V

: No limit

NIH

min

2.0V, 5 k

April 1994

Revised May 1999

4 A (Max) at T

NIL

28% V

www.fairchildsemi.com

min

25 C

(min)

25 C

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74vhc221a Summary of contents

Page 1

... MTC16 16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide 74VHC221AN N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. ...

Page 2

Truth Table Inputs HIGH Voltage Level HIGH-to-LOW Transition L LOW Voltage Level LOW-to-HIGH Transition X: Don’t Care Block Diagrams Note A: Cx, Rx, Dx are external Capacitor, Resistor, and ...

Page 3

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

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

... I (opr *Duty/100 I /2 (per Circuit Active Supply Current CC Duty: % Note 6: Refer to 74VHC221A Timing Chart. AC Operating Requirement Symbol Parameter t (L) Minimum Trigger W t (H) Pulse Width W t (L) Minimum Clear W Pulse Width (Note ...

Page 6

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