Datasheet
1
Data sheet acquired from Harris Semiconductor
SCHS249B
Features
• Buffered Inputs
• Typical Propagation Delay
- 6.5ns at V
CC
= 5V, T
A
= 25
o
C, C
L
= 50pF
• Exceeds 2kV ESD Protection MIL-STD-883, Method
3015
• SCR-Latchup-Resistant CMOS Process and Circuit
Design
• Speed of Bipolar FAST™/AS/S with Significantly
Reduced Power Consumption
• Balanced Propagation Delays
• AC Types Feature 1.5V to 5.5V Operation and
Balanced Noise Immunity at 30% of the Supply
• ±24mA Output Drive Current
- Fanout to 15 FAST™ ICs
- Drives 50Ω Transmission Lines
Pinout
CD54AC273, CD54ACT273
(CDIP)
CD74AC273, CD74ACT273
(PDIP, SOIC)
TOP VIEW
Description
The ’AC273 and ’ACT273 devices are octal D-type flip-flops
with reset that utilize advanced CMOS logic technology.
Information at the D input is transferred to the Q output 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.
11
12
13
14
15
16
17
18
20
19
10
9
8
7
6
5
4
3
2
1
MR
Q0
D0
D1
Q1
Q2
D3
D2
Q3
GND
V
CC
D7
D6
Q6
Q7
Q5
D5
D4
Q4
CP
Ordering Information
PART
NUMBER
TEMPERATURE
RANGE PACKAGE
CD74AC273E 0
o
C to 70
o
C
-40
o
C to 85
o
C
-55
o
C to 125
o
C
20 Ld PDIP
CD54AC273F3A -55
o
C to 125
o
C 20 Ld CDIP
CD74ACT273E 0
o
C to 70
o
C
-40
o
C to 85
o
C
-55
o
C to 125
o
C
20 Ld PDIP
CD54ACT273F3A -55
o
C to 125
o
C 20 Ld CDIP
CD74AC273M 0
o
C to 70
o
C
-40
o
C to 85
o
C
-55
o
C to 125
o
C
20 Ld SOIC
CD74ACT273M 0
o
C to 70
o
C
-40
o
C to 85
o
C
-55
o
C to 125
o
C
20 Ld SOIC
NOTES:
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 for
ordering information.
August 1998 - Revised July 2002
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
FAST™ is a Trademark of Fairchild Semiconductor.
Copyright
© 2002, Texas Instruments Incorporated
CD54AC273, CD74AC273
CD54ACT273, CD74ACT273
Octal D Flip-Flop with Reset