ITT - Index of

_
I mm
,ITT54164, ITT74164
.L.L ____ 8_-_B_IT.P_A_R_A_L_L_E_L-_O_U_T_S_E_R_IA_L_·_S_H_1
SEMICONDUCTORS
F_T_R_E_G_IS_T_E_RS
a-BIT PARALLEL-OUT
SERIAL SHIFT
REGISTERS
DUAL-IN-LINE PACKAGE
AND FLAT . PACKAGE
PIN CONFIGURATION
(TOP VIEW)t
• Gated (Enable/Di!1ablel Serial Inputs
• Fully Buffered Clock and Serial Inputs
• Asynchronous Clear
• Typical Maximum Input Clock
Frequency ... 36 MHz
These 8-bit shift registers feature gated serial inputs
and ·an asynchronous clear. The gated serial
inputs (A and B) permit complete control over incoming
data as a low at either (or both) input(s)
inhibits entry of the new data and resets the first
flip~flop to the low level at the next clock pulse.
A high-level input enables the other input which
will then determine the sta~ of the first flip-flop.
Data at the serial inputs may be changed while the
clock is high. but only information meeting the
setup requirements will be entered. Clocking occurs
on the 10w-to-high~level transition of the clock input.
All inputs are diode-clamped tei minimize
transmission-line effects. and are buffered to represent
only one Seties 54174 load which simplifies
system design. Power dissipation is typically 21
milliwatts per bit. Maximum input clock frequency
is typically 36 megahertz ..
The ITI54164 is characterized for operation over
the full military temperature range of -55°C to
125°C; the ITI74164 is characterized for operation
from O°C to 70°C ..
SERI;;:-A I 1----,
INPUTS
Le 2
rcA 3
loe
OUTPUTS
loc
kD
VCC
LOW INPUT TO CLEAR RESETS ALL OUTPUTS
TO THE LOW LEVEL.
tPin assignments for these circuits are the same for all
packages.
TRUTH TABLE
SERIAL INPUTS A AND B
Inputs Output
ATtn AT t n+1
A B Q A
H H H
L H L
H L L
L L L
absolute maXimum ratings over operating free-air
temperature range (uniess otherwise noted)
Supply voltage. V CC (see Note 1) .................. , ........ 7V
I nput voltage (see Note 1) .................................. ~. 5.5V
Operating free-air temperature 'range:
ITT54164 .................. ~ ................ - 55°C to 125°C
ITT74164 ............................................ O°C to 70°C
Storage temperature range ........... -65°C to 150°C
Note 1: Voltage values are with respect to network
ground term inal.
3-202