ITT - Index of

I mm
_".1-.1-___________
, SEMICONDUCTORS
ITT5475, ITT7475
4_-_B_IT_B_I_S_TA_B_LE_L_A_T_C_H_E_S
,'"
4-BIT BISTABLE LATCHES
"
These latches are ideally suited for use as temporary
storage for binary information between processing
units and input/output or indicator units,
Information present at a data (0) input is transferred
to the Q output when the clock is high. and
the Q output will follow. the data input as long as
the clock remains·high. When the clock goes low.
the information (that was present at the data input
at the time the transition occurred) is retained at
the Q output until the clock is permitted to go high.
The iTI5475/ITI7475 features complementary Q
and Q outputs from a.4-bit latch. and is a"vailable
in the 16-pin packages.
DUAL-IN-LiNE PACKAGE
AND FLAT PACKAGE
PIN CONFIGURATION
(TOP VIEW)
10
10 20
20
CLOCK
3-4
VCC
GNO
These circuits are completely compatible with all
popular TIL. or OTL families. Typical power dissipation
is 40 milliwatts per latch. The Series 54
circuits are characterized for operation over the full
military temperature range of - 55°C to 125°C and
Series 74 circuits are characterized for operation
from ooe to 70°C.
logic
.30
POSITIVE
LOGIC: SEE TRUTH TABLE
TRUTH TABLE
(Each Latch)
tn t n+ 1
0 Q
1 1
0 0
Notes: 1. tn = bit time before clock negative-going
transition.
2. tn + 1 = bit time after clock negative-going
transition. '
.
recommended operating conditions
absolute maximum ratings (over operating
temperature range unless otherwise noted)
Supply Voltage. Vee (See Note 3) ......................... 7 V
Input Voltage, Vin (See Notes 3 and 4) ............. 5.5 V
Operating Free-Air Temperature Range:
ITT5475 ......... ;; ............................... -55°C to 125°C
ITT7475 .................................................. ·.00eto 70°C
Storage Temperature Range ......... -65°C to 150°C
Notes: 3" These voltage values are with respect to
. network ground terminal.
4. Input signals must be zero or positive with
respect to network ground terminal .
MIN
Supply Voltage Vee (See Note 3.): ITT5475 .............................................:......... 4.5
, ITT7475 .......................................................
4.75
Normalized Fan-Out From Outputs .. ~ ...................................................................
Note: 3. These voltages are with respect to network ground terminal.
NOM MAX UNIT
5
5
5.5
5.25
10
V
V
3-102