Datasheet

NTE7474
Integrated Circuit
TTL, Dual D−Type Positive−Edge−Triggered
Flip−Flop
w
/Preset and Clear
Description:
The NTE7474 contains two independent D−type positive−edge−triggered flip−flops in a 14−Lead DIP
type package characterized for operating from 0° to +70°C. A low level at the preset or clear inputs
sets or resets the outputs regardless of the levels of the other inputs. When preset and clear are inac-
tive (high), data at the D input meeting the setup time requirements are transferred to the outputs on
the positive−going edge of the clock pulse. Clock triggering occurs at a voltage level and is not directly
related to the rise time of the clock pulse. Following the hold time interval, data at the D input may
be changed without affecting the levels at the outputs.
Absolute Maximum Ratings:
(T
A
= 0° to +70°C unless otherwise specified)
Supply Voltage (Note 1), V
CC
7V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Voltage, V
IN
5.5V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Ambient Temperature Range, T
A
0° to +70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, T
stg
−65° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Note 1. Voltage values are with respect to network GND terminal.
Recommended Operating Conditions:
Parameter Symbol Test Conditions Min Typ Max Unit
Supply Voltage V
CC
4.75 5.0 5.25 V
High−Level Input Voltage V
IH
2 − − V
Low−Level Input Voltage V
IL
− − 0.8 V
High−Level Output Current I
OH
− − −0.4 mA
Low−Level Output Current I
OL
− − 16 mA
Pulse Duration
CLK High
t
w
30 − − ns
CLK Low 37 − − ns
PRE or CLR Low 30 − − ns
Input Setup Time Before CLK ↑ t
su
20 − − ns
Input Hold Time−Data After CLK ↑ t
h
5 − − ns
Operating Ambient Temperature T
A
0 − 70 °C