© 2005 Fairchild Semiconductor Corporation

DS011571

www.fairchildsemi.com

March 1993

Revised February 2005

74VHC393

Dual 4-Bit Binary Counter

General Description

The VHC393 is an advanced high speed CMOS 4-bit

Binary Counter fabricated with silicon gate CMOS technol-

ogy. It achieves the high speed operation similar to equiva-

lent Bipolar Schottky TTL while maintaining the CMOS low

power dissipation. It contains two independent counter cir-

cuits in one package, so that counting or frequency division

of 8 binary bits can be achieved with one IC. This device

changes state on the negative going transition of the

“L”) by a HIGH at the CLEAR input regardless of other

inputs.

An input protection circuit ensures that 0V 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

s Power down protection is provided on all inputs

s Pin and function compatible with 74HC393

Ordering Code:

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

Pb-Free package per JEDEC J-STD-020B.

Note 1: “_NL” indicates Pb-Free package (per JEDEC J-STD-020B). Device available in Tape and Reel only.

Logic Symbol

IEEE/IEC

Connection Diagram

Pin Descriptions

Order Number

Package

Package Description

Number

74VHC393M

M14A

14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow

74VHC393SJ

M14D

Pb-Free 14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

74VHC393MTC

MTC14

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

74VHC393MTCX_NL

(Note 1)

MTC14

Pb-Free 14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm

Wide

74VHC393N

N14A

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

Pin Names

Description

CLR1, CLR2

Clear Inputs

Clock Pulse Inputs

QA, QB, QC, QD

Outputs