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CD74HCT85M 数据表(PDF) 1 Page - Texas Instruments

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部件名 CD74HCT85M
功能描述  High Speed CMOS Logic 4-Bit Magnitude Comparator
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

CD74HCT85M 数据表(HTML) 1 Page - Texas Instruments

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1
Data sheet acquired from Harris Semiconductor
SCHS136
Features
• Buffered Inputs and Outputs
• Typical Propagation Delay: 13ns (Data to Output at
VCC = 5V, CL = 15pF, TA = 25
oC
• Serial or Parallel Expansion Without External Gating
• Fanout (Over Temperature Range)
- Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
• Wide Operating Temperature Range . . . -55oC to 125oC
• Balanced Propagation Delay and Transition Times
• Significant Power Reduction Compared to LSTTL
Logic ICs
• HC Types
- 2V to 6V Operation
- High Noise Immunity: NIL = 30%, NIH = 30%of VCC at
VCC = 5V
• HCT Types
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility,
VIL= 0.8V (Max), VIH = 2V (Min)
- CMOS Input Compatibility, Il ≤ 1µA at VOL, VOH
Description
The
CD74HC85
and
CD74HCT85
are
high
speed
magnitude
comparators
that
use
silicon-gate
CMOS
technology to achieve operating speeds similar to LSTTL
with the low power consumption of standard CMOS
integrated circuits.
These 4-bit devices compare two binary, BCD, or other
monotonic codes and present the three possible magnitude
results at the outputs (A > B, A < B, and A = B). The 4-bit
input words are weighted (A0 to A3 and B0 to B3), where A3
and B3 are the most significant bits.
The devices are expandable without external gating, in both
serial and parallel fashion. The upper part of the truth table
indicates operation using a single device or devices in a
serially
expanded
application.
The
parallel
expansion
scheme is described by the last three entries in the truth
table.
Pinout
CD74HC85, CD74HCT85
(PDIP, SOIC)
TOP VIEW
Ordering Information
PART NUMBER
TEMP. RANGE (oC)
PACKAGE
PKG.
NO.
CD74HC85E
-55 to 125
16 Ld PDIP
E16.3
CD74HCT85E
-55 to 125
16 Ld PDIP
E16.3
CD74HC85M
-55 to 125
16 Ld SOIC
M16.15
CD74HCT85M
-55 to 125
16 Ld SOIC
M16.15
NOTES:
1. When ordering, use the entire part number. Add the suffix 96 to
obtain the variant in the tape and reel.
2. Die for this part number is available which meets all electrical
specifications. Please contact your local sales office or Harris
customer service for ordering information.
14
15
16
9
13
12
11
10
1
2
3
4
5
7
6
8
B3
(A < B) IN
(A = B) IN
(A > B) IN
(A > B) OUT
(A = B) OUT
GND
(A < B) OUT
VCC
B2
A2
A1
B1
A0
B0
A3
August 1997
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright
© Harris Corporation 1997
CD74HC85,
CD74HCT85
High Speed CMOS Logic
4-Bit Magnitude Comparator
File Number
1770.1
[ /Title
(CD74
HC85,
CD74
HCT85
)
/Sub-
ject
(High
Speed
CMOS
Logic
4-Bit
Magni-
tude
Com-
para-


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