Texas Instruments JM38510-34701BSA, JM38510-34701B2A, JM38510-34701BRA, SN54F521J, SN74F521N3 Datasheet
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SN54F521, SN74F521 8-BIT IDENTITY COMPARATORS
SDFS091 ± MARCH 1987 ± REVISED OCTOBER 1993
•Compares Two 8-Bit Words
•Package Options Include Plastic Small-Outline Packages, Ceramic Chip Carriers, and Standard Plastic and Ceramic 300-mil DIPs
description
These identity comparators perform comparisons on two 8-bit binary or BCD words. They provide
P = Q outputs.
The SN54F521 is characterized for operation over the full military temperature range of ±55°C to 125°C. The SN74F521 is characterized for operation from 0°C to 70°C.
SN54F521 . . . J PACKAGE SN74F521 . . . DW OR N PACKAGE (TOP VIEW)
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OE |
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1 |
20 |
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VCC |
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P0 |
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2 |
19 |
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P = Q |
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Q0 |
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3 |
18 |
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Q7 |
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P1 |
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4 |
17 |
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P7 |
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Q1 |
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5 |
16 |
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Q6 |
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P2 |
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6 |
15 |
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P6 |
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Q2 |
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7 |
14 |
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Q5 |
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P3 |
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8 |
13 |
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P5 |
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Q3 |
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9 |
12 |
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Q4 |
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GND |
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10 |
11 |
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P4 |
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SN54F521 . . . FK PACKAGE |
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FUNCTION TABLE |
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(TOP VIEW) |
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INPUTS |
OUTPUT |
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Q0 |
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CC |
Q |
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P0 |
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P, Q |
OE |
P = Q |
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OE V |
=P |
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P = Q |
L |
L |
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P ≠ Q |
X |
H |
P1 |
3 |
2 |
1 |
20 19 |
Q7 |
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4 |
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18 |
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X |
H |
H |
Q1 |
5 |
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17 |
P7 |
logic symbol² |
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P2 |
6 |
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16 |
Q6 |
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Q2 |
7 |
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15 |
P6 |
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P3 |
8 |
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14 |
Q5 |
1 |
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COMP |
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9 |
10 11 12 13 |
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OE |
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Q3 |
GND |
P4 |
Q4 |
P5 |
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2 |
0 |
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P0 |
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4 |
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P1 |
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6 |
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P2 |
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8 |
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P3 |
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11 |
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P |
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P4 |
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13 |
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P5 |
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15 |
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P6 |
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17 |
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P7 |
7 |
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1P = Q |
19 |
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3 |
0 |
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P = Q |
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Q0 |
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5 |
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Q1 |
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7 |
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Q2 |
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9 |
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Q3 |
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12 |
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Q |
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Q4 |
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14 |
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Q5 |
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16 |
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Q6 |
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18 |
7 |
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Q7 |
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²This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
Copyright 1993, Texas Instruments Incorporated
POST OFFICE BOX 655303 •DALLAS, TEXAS 75265 |
2±1 |
SN54F521, SN74F521
8-BIT IDENTITY COMPARATORS
SDFS091 ± MARCH 1987 ± REVISED OCTOBER 1993
logic diagram (positive logic)
P7
Q7
P6
Q6
P5
Q5
P4
Q4
P3
Q3
P2
Q2
P1
Q1
P0
Q0
17
18
15
16
13
14
11
12
19
P = Q
8
9
6
7
4
5
2
3
1
OE
2±2 |
POST OFFICE BOX 655303 •DALLAS, TEXAS 75265 |
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