CDx4HC(T)273 High-Speed CMOS Logic Octal D-Type Flip-Flop with Reset

1 Features

• Common clock and asynchronous controller reset

• Positive edge triggering

• Buffered inputs

• Fanout (over temperature range)

– Standard outputs: 10 LSTTL loads

– Bus driver outputs: 15 LSTTL loads

• Wide operating temperature range: –55

℃ to 125℃

• Balanced propagation delay and transition times

• Significant power reduction compared to LSTTL

Logic ICs

• HC types:

– 2 V to 6 V operation

– High noise immunity: NIL = 30%, NIH = 30% of

VCC at VCC = 5V

• HCT types:

– 4.5 V to 5.5 V operation

– Direct LSTTL input logic compatibility, VIL = 0.8

V (max), VIH = 2 V (min)

– CMOS input compatibility, II ≤ 1 μA at VOL,VOH

2 Description

The ’HC273 and ’HCT273 high speed octal D-Type

flip-flops with a direct clear input are manufactured

with silicon-gate CMOS technology. They possess the

low power consumption of standard CMOS integrated

circuits.

Information at the D input is transferred to the Q

outputs on the positive-going edge of the clock pulse.

All eight flip-flops are controlled by a common clock

(CLK) and a common reset (CLR). Resetting is

accomplished by a low voltage level independent of

the clock. All eight Q outputs are reset to a logic 0.

Device Information

PART NUMBER

PACKAGE

(1)

BODY SIZE (NOM)

CD54HC273F

CDIP (20)

26.92 mm × 6.92 mm

CD74HC273M

SOIC (20)

12.80 mm × 7.50 mm

CD74HC273E

PDIP (20)

25.40 mm × 6.35 mm

CD74HCT273M

SOIC (20)

12.80 mm × 7.50 mm

CD74HCT273

PDIP (20)

25.40 mm × 6.35 mm

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

D

R

Q

xD

xQ

One of Eight D-Type Flip-Flops

CLK

CLR

Shared Control Logic

Functional Block Diagram

CD54HC273, CD74HC273

CD54HCT273, CD74HCT273

SCHS174C – FEBRUARY 1998 – REVISED JANUARY 2022

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.