SN54HC195 Datasheet, PDF (1/10 Pages) Texas Instruments – 4-BIT PARALLEL-ACCESS SHIFT REGISTERS

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FEATURES
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• Synchronous Parallel Load
• Positive-Edge-Triggered Clocking
• J and K Inputs to First Stage
• Complementary Outputs From Last Stage
• Package Options: Plastic and Ceramic DIPS
and Ceramic Chip Carriers
• Dependable Texas lnstruments Quality and
Reliability
DESCRIPTION/ORDERING INFORMATION
These 4-bit registers feature parallel inputs, parallel
outputs, J-K serial inputs, shift/load control input, and
a direct overriding clear. The registers have two
modes of operation: parallel (broadside) load, and
shift (in the direction Q_A and Q_D).
Parallel loading is accomplished by applying the
4-bits of data and taking the shift/load control input
low. The data is loaded into the associated flip-flop
and appears at the outputs after the positive
transition of the clock input. During loading, serial
data flow is inhibited.
Shifting is accomplished synchronously when the
shift/load control input is high. Serial data for this
mode is entered at the J-K inputs. These inputs
permit the first stage to perform as a J-K, D, or T type
flip-flop as shown in the function table.
The SN54HC195 is characterized for operation over
the full military temperature range of –55°C to 125°C.
SN54HC195
4-BIT PARALLEL-ACCESS SHIFT REGISTERS
SCLS124A – DECEMBER 1992 – REVISED NOVEMBER 2007
SN54HC195 . . . J PACKAGE
(TOP VIEW)
CLR 1
J2
K3
A4
B5
C6
D7
GND 8
16 VCC
15 Q_A
14 Q_B
13 Q_C
12 Q_D
11 Q_D
10 CLK
9 SH/LD
SN54HC195 . . . FK PACKAGE
(TOP VIEW)
K
3 2 1 20 19
4
18
Q_B
A5
17 QC
NC 6
16 NC
B7
15 Q_D
C8
14 Q_D
9 10 11 12 13
NC − No internal connection
LOGIC SYMBOL^†
(1)
CLR
SH/LD ⁽⁹⁾
(10)
CLK
(2)
J
(3)
K
(4)
A
(5)
B
(6)
C
(7)
D
SRG4
R
M1 (SHIFT)
M2 (LOAD)
C3/1
1,3J
1,3K
2,3D
2,3D
(15)
Q_A
(14)
Q_B
(13)
Q_C
(12)
Q_D
(11)
Q_D
† _{This symbol is in accordance with ANSI/IEEE Std 91−1984}
and IEC Publication 617−12.
Pin numbers shown are for J package.
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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