CD4585BMS Datasheet, PDF (1/8 Pages) Intersil Corporation – CMOS 4-Bit Magnitude Comparator

CD4585BMS
December 1992
CMOS 4-Bit Magnitude Comparator
Features
Pinout
• High Voltage Type (20V Rating)
• Expansion to 8, 12, 16 . . .4N Bits by Cascading Units
• Medium Speed Operation
- Compares Two 4-Bit Words in 180ns (Typ.) at 10V
• 100% Tested for Quiescent Current at 20V
• Standardized Symmetrical Output Characteristics
• 5V, 10V and 15V Parametric Ratings
• Maximum Input Current of 1µA at 18V Over Full Pack-
age Temperature Range; 100nA at 18V and +25^oC
• Noise Margin (Over Full Package/Temperature Range)
- 1V at VDD = 5V
- 2V at VDD = 10V
- 2.5V at VDD = 15V
• Meets All Requirements of JEDEC Tentative Standard
No. 13B, “Standard Specifications for Description of
‘B’ Series CMOS Devices”
Applications
• Servo Motor Controls
• Process Controllers
Description
CD4585BMS is a 4-bit magnitude comparator designed for
use in computer and logic applications that require the com-
parison of two 4-bit words. This logic circuit determines
whether one 4-bit word (Binary or BCD) is “less than”, “equal
to” or “greater than” a second 4-bit word.
The CD4585BMS has eight comparing inputs (A3, B3,
through A0, B0), three outputs (A < B, = B, A > B) and three
cascading inputs (A < B, A = B, A > B) that permit system
designers to expand the comparator function to 8, 12, 16 . .
.4N bits. When a single CD4585BMS is used, the cascading
inputs are connected as follows: (A < B) = low, (A = B) =
high, (A > B) = high.
CD4585BMS
TOP VIEW
B2 1
A2 2
(A = B)OUT 3
(A > B)IN 4
(A < B)IN 5
(A = B)IN 6
A1 7
VSS 8
16 VDD
15 A3
14 B3
13 (A > B)OUT
12 (A < B)OUT
11 B0
10 A0
9 B1
Functional Diagram
WORD “A”
10
A0
7
A1
2
A2
15
A3
4
A>B
CASCADING
6
INPUTS
A=B
5
A<B
WORD “B”
11
B0
9
B1
1
B2
14
B3
VDD = 16
13
A>B
3
A=B
12
A<B
VSS = 8
Cascading thses units for comparision of more than 4 bits is
accomplished as shown in Figure 9.
The CD4585BMS is supplied in these 16-lead outline pack-
ages:
Braze Seal DIP
Frit Seal DIP
Ceramic Flatpack
H4T
H1E
H6W
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Copyright © Intersil Corporation 1999
7-1259
File Number 3347