74hct7403 NXP Semiconductors, 74hct7403 Datasheet - Page 23

• Manufacturer Part Number: 74hct7403
• Description: 4-bit X 64-word Fifo Register; 3-state
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Note to Fig.19
This circuit is only required if the SI input is constantly held HIGH, when the FIFO is empty and the automatic shift-in
cycles are started or if SO output is constantly held HIGH, when the FIFO is full and the automatic shift-out cycles are
started (see Figs 7 and 10).
September 1993
handbook, full pagewidth
4-Bit x 64-word FIFO register; 3-state
composite
DIR
Fig.19 Expanded FIFO for increased word length.
Q
Q
Q
Q R
74
CP
CP
D
D
MR
SI
4
4
DIR
SI
DIR
SI
D n
MR
MR
D n
23
7403
7403
DOR
DOR
Q n
SO
OE
SO
OE
Q n
4
4
SO
OE
D
D
CP
CP
74
R
Q
Q
Q
Q
74HC/HCT7403
MGA683
Product specification
composite
DOR