74hct7403 NXP Semiconductors, 74hct7403 Datasheet - Page 25

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

Philips Semiconductors
Notes to Fig.21
1. FIFO
2. Load one word into FIFO
3. Data-out
4. DOR
5. DIR
6. DIR
7. DOR
September 1993
handbook, full pagewidth
4-Bit x 64-word FIFO register; 3-state
meeting data input set-up requirements of FIFO
output ready pulse, data is shifted into FIFO
anticipation of additional data
output stage.
B
B
A
A
B
and SO
and SO
goes HIGH; (ripple through delay after SI
and SI
and FIFO
A
/data-in
B
A
A
pulse HIGH; (ripple through delay after SI
go LOW; flag indicates input stage of FIFO
go HIGH automatically; the input stage of FIFO
B
initially empty, SO
B
Fig.21 FIFO to FIFO communication; input timing under empty condition.
transition; valid data arrives at FIFO
DOR B
DIR A
DOR A SI B
DIR B
Q nA
Q
SI A
nB
A
D
; SI pulse applied, results in DIR pulse
SO A
nB
1
A
V M
held HIGH in anticipation of data
(1)
V M
B
(1)
B
B
LOW) valid data is present one propagation delay later at the FIFO
ripple through
2
delay
25
A
A
LOW) data is unloaded from FIFO
B
output stage after a specified delay of the DOR flag,
3
is busy, shift-out of FIFO
V M
5
B
(1)
is again able to receive data, SO is held HIGH in
V M
4
(1)
ripple through
delay
6
7
A
V M
is complete
MGA666
(1)
74HC/HCT7403
A
as a result of the data
Product specification
B