SNJ54LS273J Datasheet, PDF (1/8 Pages) Texas Instruments – Contains Eight Flip-Flops With Single-Rail Outputs

• Contains Eight Flip-Flops With Single-Rail
Outputs
• Buffered Clock and Direct Clear Inputs
• Individual Data Input to Each Flip-Flop
• Applications Include:
Buffer/Storage Registers
Shift Registers
Pattern Generators
description
These monolithic, positive-edge-triggered flip-
flops utilize TTL circuitry to implement D-type
flip-flop logic with a direct clear input.
Information at the D inputs meeting the setup time
requirements is transferred to the Q outputs on the
positive-going edge of the clock pulse. Clock
triggering occurs at a particular voltage level and
is not directly related to the transition time of the
positive-going pulse. When the clock input is at
either the high or low level, the D input signal has
no effect ar the output.
These flip-flops are guaranteed to respond to
clock frequencies ranging form 0 to 30 megahertz
while maximum clock frequency is typically 40
megahertz. Typical power dissipation is 39
milliwatts per flip-flop for the ′273 and 10 milliwatts
for the ′LS273.
SN54273, SN54LS273, SN74273, SN74LS273
OCTAL D-TYPE FLIP-FLOP WITH CLEAR
SDLS090 – OCTOBER 1976 – REVISED MARCH 1988
SN54273, SN74LS273 . . . J OR W PACKAGE
SN74273 . . . N PACKAGE
SN74LS273 . . . DW OR N PACKAGE
(TOP VIEW)
CLR 1
1Q 2
1D 3
2D 4
2Q 5
3Q 6
3D 7
4D 8
4Q 9
GND 10
20 V_CC
19 8Q
18 8D
17 7D
16 7Q
15 6Q
14 6D
13 5D
12 5Q
11 CLK
SN54LS273 . . . FK PACKAGE
(TOP VIEW)
2D
3 2 1 20 19
4
18
8D
2Q ₅
17 ^7D
3Q 6
16 7Q
3D 7
15 6Q
4D 8
14 6D
9 10 11 12 13
FUNCTION TABLE
(each flip-flop)
INPUTS
CLEAR CLOCK D
OUTPUT
Q
L
X
X
L
H
↑
H
H
H
↑
L
L
H
L
X
Q0
logic symbol^†
1
CLR
11
CLK
3
1D
4
2D
7
3D
8
4D
13
5D
14
6D
17
7D
18
8D
EN
C1
1D
2
1Q
5
2Q
6
3Q
9
4Q
12
5Q
15
6Q
16
7Q
19
8Q
† _{This symbol is in accordance with ANSI/IEEE Std.}
91-1984 and IEC Publication 617-12.
Pin numbers shown are for the DW, J, N, and W packages.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 1988, Texas Instruments Incorporated
1