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The MM74C373 and MM74C374 are integrated, complementary MOS (CMOS), 8-bit storage elements with 3-STATE outputs. These outputs have been specially designed to drive high capacitive loads, such as one might find when driving a bus, and to have a fan out of 1 when driving standard TTL. When a high logic level is applied to the OUTPUT DISABLE input, all outputs go to a high impedance state, regardless of what signals are present at the other inputs and the state of the storage elements.
The MM74C373 is an 8-bit latch. When LATCH ENABLE is high, the Q outputs will follow the D inputs. When LATCH ENABLE goes low, data at the D inputs, which meets the set-up and hold time requirements, will be retained at the outputs until LATCH ENABLE returns high again.
The MM74C374 is an 8-bit, D-type, positive-edge triggered flip-flop. Data at the D inputs, meeting the set-up and hold time requirements, is transferred to the Q outputs on positive- going transitions of the CLOCK input.
MM74C374 Maximum Ratings
Voltage at Any Pin
-0.3V to VCC + 0.3V
Operating Temperature Range (TA)
MM74C373
-40 to +85
Storage Temperature Range (TS)
-65 to +150
Power Dissipation
Dual-In-Line
700 mW
Small Outline
500 mW
Operating VCC Range
3V to 15V
Absolute Maximum VCC
18V
Lead Temperature (TL)
(soldering, 10 seconds)
260
MM74C374 Features
` Wide supply voltage range: 3V to 15V ` High noise immunity: 0.45 VCC (typ.) ` Low power consumption ` TTL compatibility: Fan out of 1driving standard TTL ` Bus driving capability ` 3-STATE outputs ` Eight storage elements in one package ` Single CLOCK/LATCH ENABLE and OUTPUT DISABLE control inputs ` 20-pin dual-in-line package with 0.300" centers takes half the board space of a 24-pin package