74HC7403 Datasheet, PDF (3/28 Pages) NXP Semiconductors – 4-Bit x 64-word FIFO register; 3-state

Philips Semiconductors
4-Bit x 64-word FIFO register; 3-state
Product specification
74HC/HCT7403
PINNING
SYMBOL
OE
DIR
SI
D_O to D₃
GND
MR
Q₃ to Q₀
DOR
SO
V_CC
PIN
DESCRIPTION
1
output enable input (active LOW)
2
data-in-ready output
3
shift-in input (active HIGH)
4, 5, parallel data input
6, 7
8
ground
9
asynchronous master-reset
input (active LOW)
10, 11, data output
12, 13
14
data-out-ready output
15
shift-out input (active LOW)
16
positive supply voltage
handbook, halfpage
OE 1
DIR 2
SI 3
D0 4
D1 5
D2 6
D3 ₇
GND 8
16 VCC
15 _SO
14 DOR
7403
13 Q0
12 Q1
11 Q2
10 ^Q3
9 _MR
MGA672
Fig.1 Pin configuration.
handbook, halfpage
4
5
6
7
3
15
1
OE
D0
Q0
13
D1
Q1
12
D2
Q2
11
D3
Q3
10
SI
DOR
14
SO
DIR
2
MR
9
MGA674
Fig.2 Logic symbol.
September 1993
handbook, halfpage
1
3
9
15
4
5
6
7
FIFO 64 x 4
2
EN4
[IR] 3
14
1Z2
[OR] 6
CTR
1 ( /C2) _{CT < 64 G1}
CT = 0
5
CT ^> 0 G5
5Z6
2D
4
13
12
11
10
MGA676
Fig.3 IEC logic symbol.
3