74hct7403 NXP Semiconductors, 74hct7403 Datasheet - Page 12

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

Philips Semiconductors
AC WAVEFORMS
Shifting in sequence FIFO empty to FIFO full
Notes to Fig.6
1. DIR initially HIGH; FIFO is prepared for valid data
2. SI set HIGH; data loaded into input stage
3. DIR goes LOW, input stage “busy”
4. SI set LOW; data from first location “ripple through”
5. DIR goes HIGH, status flag indicates FIFO prepared for additional data
6. Repeat process to load 2nd word through to 64th word into FIFO
September 1993
handbook, full pagewidth
4-Bit x 64-word FIFO register; 3-state
(1) HC : V
Fig.6
DIR remains LOW; with attempt to shift into full FIFO, no data transfer occurs.
HCT: V
Waveforms showing the SI input to DIR output propagation delay, the SI pulse width and SI maximum
pulse frequency.
M
M
= 50%; V
= 1.3 V; V
SI INPUT
DIR OUTPUT
D n INPUT
I
= GND to V
I
= GND to 3 V.
CC
.
1
t PHL
2
1st word
1/ f max
3
t PLH
V M
(1)
t
4
W
5
12
V M
2nd word
(1)
6
64th word
74HC/HCT7403
7
MGA659
Product specification