M74HCT393 데이터 시트보기 (PDF) - STMicroelectronics

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M74HCT393

DUAL BINARY COUNTER

STMicroelectronics 

M74HCT393

DUAL BINARY COUNTER

s HIGH SPEED :

fMAX = 80MHz (TYP.) at VCC = 4.5V

s LOW POWER DISSIPATION:

ICC =4µA(MAX.) at TA=25°C

s COMPATIBLE WITH TTL OUTPUTS :

VIH = 2V (MIN.) VIL = 0.8V (MAX)

s SYMMETRICAL OUTPUT IMPEDANCE:

|IOH| = IOL = 4mA (MIN)

s BALANCED PROPAGATION DELAYS:

tPLH ≅ tPHL

s PIN AND FUNCTION COMPATIBLE WITH

74 SERIES 393

DESCRIPTION

The M74HCT393 is an high speed CMOS DUAL

BINARY COUNTER fabricated with silicon gate

C2MOS technology.

This counter circuit contains independent ripple

carry counters and two 4-bit ripple carry binary

counters, which can be cascaded to create a

single divide by 256 counter.

Each 4-bit counter is incremented on the high to

low transition (negative edge) of the clock input,

and each has an independent clear input. When

CLEAR(CLR) is set to high, all four bits of each

DIP

SOP

TSSOP

ORDER CODES

PACKAGE

TUBE

T &R

DIP

SOP

TSSO P

M74HCT393B1R

M74HCT393M1R M74HCT393RM13TR

M74HCT393TTR

counter are set to a low level. This enables count

truncation and allows the implementation of divide

by N counter configurations.

All inputs are equipped with protection circuits

against static discharge and transient excess

voltage.

PIN CONNECTION AND IEC LOGIC SYMBOLS

September 2001

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