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ST Microelectronics - 8 BIT PIPO SHIFT REGISTER

Numéro de référence M54HC195F1R
Description 8 BIT PIPO SHIFT REGISTER
Fabricant ST Microelectronics 
Logo ST Microelectronics 





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M54HC195F1R fiche technique
M54HC195
M74HC195
. HIGH SPEED
tPD = 13 ns (TYP.) at VCC = 5 V
. LOW POWER DISSIPATION
ICC = 4 µA (MAX.) at TA = 25 °C 6 V
. HIGH NOISE IMMUNITY
VNIH = VNIL = 28 % VCC (MIN.)
. OUTPUT DRIVE CAPABILITY
10 LSTTL LOADS
. SYMMETRICAL OUTPUT IMPEDANCE
IOH= IOL = 4 mA (MIN.)
. BALANCED PROPAGATION DELAYS
tPLH = tPHL
. WIDE OPERATING VOLTAGE RANGE
VCC (OPR) = 2 V to 6 V
. PIN AND FUNCTION COMPATIBLE
WITH 54/74LS195
8 BIT PIPO SHIFT REGISTER
B1R
(Plastic Package)
F1R
(Ceramic Package)
M 1R
(Micro Package)
C1R
(Chip Carrier)
ORDER CODES :
M 54HC 19 5F 1R
M 74H C1 95 M1 R
M 74HC 19 5B 1R
M 74H C1 95 C1 R
PIN CONNECTIONS (top view)
DESCRIPTION
The M54/74HC195 is a high speed CMOS 4 BIT
PIPO SHIFT REGISTER fabricated in silicon gate
C2MOS technology. It has the same high speed per-
formance of LSTTL combined with true CMOS low
power consumption.
This shift register features parallel inputs, parallel
outputs, J-K serial inputs, a SHIFT/LOAD control
input, and a direct overriding CLEAR. This shift reg-
ister can operate in two modes : Parallel Load ; Shift
from QA towards QD.
Parallel loading is accomplished by applying the four
bits of data, and taking the SHIFT/LOAD control
input low. The data is loaded into the associated flip
flops and appears at the outputs after the positive
transition of the clock input. During parallel loading,
serial data flow is inhibited. Serial shifting occurs
synchronously when the SHIFT/LOAD control input
is high. Serial data for this mode is entered at the J-K
inputs. These inputs allow the first stage to perform
as a J-K or TOGGLE flip flop as shown in the truth-
table.
All inputs are equipped with protection circuits
against static discharge transient excess voltage.
October 1992
NC =
No Internal
Connection
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