These identity comparators perform comparisons on two 8-bit binary or BCD words. The SN74ALS518 provides P = Q outputs, while the ′ALS520 and SN74ALS521 provide P = Q outputs. The SN74ALS518 has an open-collector output. The SN74ALS518 and ′ALS520 feature 20-kΩ pullup resistors on the Q inputs for analog or switch data. The SN54ALS520 is characterized for o.
to 125°C. The SN74ALS518, SN74ALS520, and SN74ALS521 are characterized for operation from 0°C to 70°C.
Q3 GND
P4 Q4 P5
SDAS224B
– JUNE 1982
– REVISED NOVEMBER 1995
SN54ALS520 . . . J PACKAGE SN74ALS518, SN74ALS520, SN74ALS521 . . . DW OR N PACKAGE
(TOP VIEW)
G P0 Q0 P1 Q1 P2 Q2 P3 Q3 GND
1 2 3 4 5 6 7 8 9 10
20 VCC 19 P = Q / P = Q† 18 Q7 17 P7 16 Q6 15 P6 14 Q5 13 P5
12 Q4
11 P4
† P = Q for SN74ALS518 P = Q for ′ALS520 and SN74ALS521
SN54ALS520 . . . FK PACKAGE (TOP VIEW)
Q0 P0 G VCC P=Q
P1
3 2 1 20 19 4 18
Q7
Q1 5
17 P7
P2 6
16 Q6
Q2 7
15 P6
P3 8
14 Q5
9 10 11 12 13
FUNC.
No. | Partie # | Fabricant | Description | Fiche Technique |
---|---|---|---|---|
1 | SN74ALS520 |
Texas Instruments |
8-BIT IDENTITY COMPARATORS | |
2 | SN74ALS518 |
Texas Instruments |
8-BIT IDENTITY COMPARATORS | |
3 | SN74ALS533A |
Texas Instruments |
OCTAL D-TYPE TRANSPARENT LATCHES | |
4 | SN74ALS534A |
Texas Instruments |
OCTAL D-TYPE EDGE-TRIGGERED FLIP-FLOP | |
5 | SN74ALS540 |
Texas Instruments |
OCTAL BUFFERS AND LINE DRIVER | |
6 | SN74ALS541 |
Texas Instruments |
OCTAL BUFFERS AND LINE DRIVER | |
7 | SN74ALS561A |
Texas Instruments |
SYNCHRONOUS 4-BIT COUNTERS | |
8 | SN74ALS563B |
ETCTI |
OCTAL D-TYPE TRANSPARENT LATCHES (Rev. B) | |
9 | SN74ALS564B |
Texas Instruments |
OCTAL D-TYPE EDGE-TRIGGERED FLIP-FLOP | |
10 | SN74ALS573C |
Texas Instruments |
Octal D-Type Transparent Latches | |
11 | SN74ALS574B |
Texas Instruments |
OCTAL D-TYPE EDGE-TRIGGERED FLIP-FLOP | |
12 | SN74ALS575A |
Texas Instruments |
OCTAL D-TYPE EDGE-TRIGGERED FLIP-FLOP |