CD74HC273,
CD74HCT273
Data sheet acquired from Harris Semiconductor
SCHS174
High Speed CMOS Logic
February 1998
Octal D-Type Flip-Flop with Reset
Features
Description
• Common Clock and Asynchronous Master Reset
• Positive Edge Triggering
• Buffered Inputs
The Harris CD74HC273 and CD74HCT273 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.
[ /Title
(CD74
HC273
,
CD74
HCT27
3)
Information at the D inputis transferred to the Q outputs on
the positive-going edge of the clock pulse. All eight flip-flops
are controlled by a common clock (CP) and a common reset
(MR). Resetting is accomplished by a low voltage level
independent of the clock. All eight Q outputs are reset to a
logic 0.
• Typical f
MAX
= 60MHz at V = 5V, C = 15pF,
CC L
o
T = 25 C
A
• Fanout (Over Temperature Range)
- Standard Outputs. . . . . . . . . . . . . . . 10 LSTTL Loads
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
o
o
/Sub-
ject
• Wide Operating Temperature Range . . . -55 C to 125 C
• Balanced Propagation Delay and Transition Times
Ordering Information
TEMP. RANGE
PKG.
NO.
(High
Speed
CMOS
Logic
Octal
D-
o
• Significant Power Reduction Compared to LSTTL
Logic ICs
PART NUMBER
CD54HC273F
CD54HCT273F
CD74HC273E
CD74HCT273E
CD74HC273M
CD74HCT273M
NOTES:
( C)
PACKAGE
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
20 Ld CERDIP F20.3
20 Ld CERDIP F20.3
• HC Types
- 2V to 6V Operation
20 Ld PDIP
20 Ld PDIP
20 Ld SOIC
20 Ld SOIC
E20.3
E20.3
M20.3
M20.3
- High Noise Immunity: N = 30%, N = 30% of V
CC
IL
IH
at V
= 5V
CC
• HCT Types
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility,
Type
Flip-
V = 0.8V (Max), V = 2V (Min)
IL IH
- CMOS Input Compatibility, I ≤ 1µA at V , V
OL OH
l
1. When ordering, use the entire part number. Add the suffix 96 to
obtain the variant in the tape and reel.
2. Wafer and die for this part number is available which meets all
electrical specifications. Please contact your local sales office or
Harris customer service for ordering information.
Pinout
CD54HC273, CD54HCT273, CD74HC273, CD74HCT273
(PDIP, SOIC, CERDIP)
TOP VIEW
1
2
3
4
5
6
7
8
9
V
MR
Q0
D0
D1
Q1
Q2
D2
D3
Q3
20
19
CC
Q7
18 D7
17 D6
16 Q6
15
14
Q5
D5
13 D4
12
Q4
11 CP
GND 10
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
File Number 1479.2
Copyright © Harris Corporation 1998
1