QUAD 2-PORT REGISTER
The MC54/74F398 is the logical equivalent of a quad 2-input multiplexer feeding into four edge-triggered flip-flops.
A common Select input determines which of the two 4-bit words is accepted.
The selected data enters the flipflops on the rising edge of the clock.
• Select Inputs from Two Data Sources • Fully Positive Edge-Triggered Operation • Both True and Complement Outputs
CONNECTION DIAGRAM (TOP VIEW)
VCC Qd Qd I0d I1d I1c I0c Qc Qc CP 20 19 18 17 16 15 14 13 12 11
MC54/74F398
QUAD 2-PORT REGISTER FAST™
SCHOTTKY TTL
20 1
J SUFFIX CERAMIC CASE 732-03
12 S Qa
34 Qa I0a
56
78
9 10
I1a I1b I0b Qb Qb GND
LOGIC DIAGRAM
I0a S D Qa I1a CP Qa
I0b D Qb
I1b CP Qb
I0c...