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MC74HC273

Octal D Flip−Flop with Common Clock and Reset

ON Semiconductor 

MC74HC273A

Octal D Flip-Flop with

Common Clock and Reset

High–Performance Silicon–Gate CMOS

The MC74HC273A is identical in pinout to the LS273. The device

inputs are compatible with standard CMOS outputs; with pullup

resistors, they are compatible with LSTTL outputs.

This device consists of eight D flip–flops with common Clock and

Reset inputs. Each flip–flop is loaded with a low–to–high transition of

the Clock input. Reset is asynchronous and active low.

• Output Drive Capability: 10 LSTTL Loads

• Outputs Directly Interface to CMOS, NMOS and TTL

• Operating Voltage Range: 2.0 to 6.0 V

• Low Input Current: 1.0 µA

• High Noise Immunity Characteristic of CMOS Devices

• In Compliance with the Requirements Defined by JEDEC Standard

No. 7A

• Chip Complexity: 264 FETs or 66 Equivalent Gates

LOGIC DIAGRAM

D0 3

D1 4

DATA

INPUTS

D2 7

D3 8

D4 13

D5 14

D6 17

D7 18

CLOCK 11

2 Q0

5 Q1

6 Q2

9 Q3

12 Q4

15 Q5

16 Q6

19 Q7

NONINVERTING

OUTPUTS

RESET 1

PIN 20 = VCC

PIN 10 = GND

FUNCTION TABLE

Inputs

Output

Reset Clock D

Q

L

X

X

L

H

H

H

H

L

L

H

L

X No Change

H

X No Change

ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ Design Criteria

ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ Internal Gate Count*

ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ Internal Gate Propagation Delay

ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ Internal Gate Power Dissipation

ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ Speed Power Product

Value

66

1.5

5.0

.0075

Units

ea

ns

µW

pJ

*Equivalent to a two–input NAND gate.

© Semiconductor Components Industries, LLC, 2000

1

May, 2000 – Rev. 9

http://onsemi.com

20

1

20

1

PDIP–20

N SUFFIX

CASE 738

SOIC WIDE–20

DW SUFFIX

CASE 751D

MARKING

DIAGRAMS

20

MC74HC273AN

AWLYYWW

1

20

HC273A

AWLYYWW

1 20

20

1

TSSOP–20

DT SUFFIX

CASE 948E

HC

273A

ALYW

1

A = Assembly Location

WL = Wafer Lot

YY = Year

WW = Work Week

PIN ASSIGNMENT

RESET 1

Q0 2

D0 3

D1 4

Q1 5

Q2 6

D2 7

D3 8

Q3 9

GND 10

20 VCC

19 Q7

18 D7

17 D6

16 Q6

15 Q5

14 D5

13 D4

12 Q4

11 CLOCK

ORDERING INFORMATION

Device

Package Shipping

MC74HC273AN

PDIP–20 1440 / Box

MC74HC273ADW

SOIC–WIDE 38 / Rail

MC74HC273ADWR2 SOIC–WIDE 1000 / Reel

MC74HC273ADT

TSSOP–20 75 / Rail

MC74HC273ADTR2 TSSOP–20 2500 / Reel

Publication Order Number:

MC74HC273A/D

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