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SN74LS273J Datasheet(PDF) 1 Page - Texas Instruments

Part No. SN74LS273J
Description  OCTAL D-TYPE FLIP-FLOP WITH CLEAR
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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SN74LS273J Datasheet(HTML) 1 Page - Texas Instruments

   
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8D
7D
6D
5D
4D
3D
2D
1D
CLK
CLR
18
17
14
13
8
7
4
3
11
1
1D
C1
EN
8Q
7Q
6Q
5Q
4Q
3Q
2Q
1Q
19
16
15
12
6
5
2
9
logic symbol
† 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.
SN54273, SN54LS273, SN74273, SN74LS273
OCTAL D-TYPE FLIP-FLOP WITH CLEAR
SDLS090 – OCTOBER 1976 – REVISED MARCH 1988
Copyright
© 1988, Texas Instruments Incorporated
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
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.
FUNCTION TABLE
(each flip-flop)
INPUTS
OUTPUT
CLEAR
CLOCK
D
Q
L
X
X
L
H
HH
H
LL
H
L
X
Q0
SN54LS273 . . . FK PACKAGE
(TOP VIEW)
SN54273, SN74LS273 ...J OR W PACKAGE
SN74273 ...N PACKAGE
SN74LS273 . . . DW OR N PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
CLR
1Q
1D
2D
2Q
3Q
3D
4D
4Q
GND
VCC
8Q
8D
7D
7Q
6Q
6D
5D
5Q
CLK
32
1 20 19
910 11 12 13
4
5
6
7
8
18
17
16
15
14
8D
7D
7Q
6Q
6D
2D
2Q
3Q
3D
4D
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.


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