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Details, datasheet, quote on part number:SN54HC688W
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Datasheet text preview:
SN54HC688, SN74HC688 8-BIT IDENTITY COMPARATORS
SCLS010B DECEMBER 1982 REVISED MAY 1997
D D
Compare Two 8-Bit Words Package Options Include Plastic Small-Outline (DW) and Ceramic Flat (W) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs
SN54HC688 . . . J OR W PACKAGE SN74HC688 . . . DW OR N PACKAGE (TOP VIEW)
description
These identity comparators perform comparisons of two 8-bit binary or BCD words. An output-enable (OE) input may be used to force the output to the high level. The SN54HC688 is characterized for operation over the full military temperature range of 55°C to 125°C. The SN74HC688 is characterized for operation from 40°C to 85°C.
FUNCTION TABLE INPUTS DATA P, Q P=Q P>Q POE P0 Q0 P1 Q1 P2 Q2 P3 Q3 GND
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
VCC P=Q Q7 P7 Q6 P6 Q5 P5 Q4 P4
SN54HC688 . . . FK PACKAGE (TOP VIEW)
Q0 P0 OE VCC P=Q P1 Q1 P2 Q2 P3
4 5 6 7 8 3 2 1 20 19 18 17 16 15 14 9 10 11 12 13
Q7 P7 Q6 P6 Q5
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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 © 1997, Texas Instruments Incorporated
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
Q3 GND P4 Q4 P5
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SN54HC688, SN74HC688 8-BIT IDENTITY COMPARATORS
SCLS010B DECEMBER 1982 REVISED MAY 1997
logic symbol
1 2 4 6 8 11 13 15 17 3 5 7 9 12 14 16 18 7 Q 7 0 P=Q 19 P=Q P COMP EN 0
OE P0 P1 P2 P3 P4 P5 P6 P7 Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
logic diagram (positive logic)
OE P0 Q0 P1 Q1 P2 Q2 P3 Q3 P4 Q4 P5 Q5 P6 Q6 P7 Q7 1 2 3 4 5 6 7 8 9 11 12 13 14 15 16 17 18 19 P=Q
2
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
SN54HC688, SN74HC688 8-BIT IDENTITY COMPARATORS
SCLS010B DECEMBER 1982 REVISED MAY 1997
absolute maximum ratings over operating free-air temperature range
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to 7 V Input clamp current, IIK (VI VCC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA Output clamp current, IOK (VO VCC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±25 mA Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA Package thermal impedance, JA (see Note 2): DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97°C/W N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67°C/W Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65°C to 150°C
Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed. 2. The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace length of zero.
recommended operating conditions
SN54HC688 MIN VCC VIH Supply voltage High-level input voltage VCC = 2 V VCC = 4.5 V VCC = 6 V VCC = 2 V VIL VI VO tt TA Low-level input voltage Input voltage Output voltage Input transition (rise and fall) time Operating free-air temperature VCC = 2 V VCC = 4.5 V VCC = 6 V VCC = 4.5 V VCC = 6 V 2 1.5 3.15 4.2 0 0 0 0 0 0 0 0 55 0.5 1.35 1.8 VCC VCC 1000 500 400 125 NOM 5 MAX 6 SN74HC688 MIN 2 1.5 3.15 4.2 0 0 0 0 0 0 0 0 40 0.5 1.35 1.8 VCC VCC 1000 500 400 85 °C ns V V V V NOM 5 MAX 6 UNIT V
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
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