PHILIPS HEF4585B

INTEGRATED CIRCUITS
DATA SHEET
For a complete data sheet, please also download:
• The IC04 LOCMOS HE4000B Logic
Family Specifications HEF, HEC
• The IC04 LOCMOS HE4000B Logic
Package Outlines/Information HEF, HEC
HEF4585B
MSI
4-bit magnitude comparator
Product specification
File under Integrated Circuits, IC04
January 1995
Philips Semiconductors
Product specification
HEF4585B
MSI
4-bit magnitude comparator
For proper compare operation the expander inputs to the
least significant position must be connected as follows:
IA = B = IA > B = HIGH, IA < B = LOW. For words greater than
4-bits, units can be cascaded by connecting outputs
OA < B and OA = B to the corresponding inputs of the next
significant comparator (input IA > B is connected to a
HIGH).
DESCRIPTION
The HEF4585B is a 4-bit magnitude comparator which
compares two 4-bit words (A and B), whether they are ‘less
than’, ‘equal to’, or ‘greater than’. Each word has four
parallel inputs (A0 to A3 and B0 to B3); A3 and B3 being the
most significant inputs. Three outputs are provided;
A greater than B (OA > B), A less than B (OA < B) and
A equal to B (OA = B). Three expander inputs (IA > B,
IA < B and IA = B) allow cascading of the devices without
external gates.
Operation is not restricted to binary codes, the devices will
work with any monotonic code. The function table
describes the operation of the device under all possible
logic conditions.
Fig.2 Pinning diagram.
HEF4585BP(N):
16-lead DIL; plastic (SOT38-1)
HEF4585BD(F):
16-lead DIL; ceramic (cerdip) (SOT74)
HEF4585BT(D):
16-lead SO; plastic (SOT109-1)
( ): Package Designator North America
PINNING
Fig.1 Functional diagram.
A0 to A3
word A parallel inputs
B0 to B3
word B parallel inputs
IA > B, IA < B, IA = B expander inputs
OA > B
A greater than B output
OA < B
A less than B output
OA = B
A equal to B output
FAMILY DATA, IDD LIMITS category MSI
See Family Specifications
January 1995
2
Philips Semiconductors
Product specification
HEF4585B
MSI
4-bit magnitude comparator
Fig.3 Logic diagram.
January 1995
3
Philips Semiconductors
Product specification
HEF4585B
MSI
4-bit magnitude comparator
FUNCTION TABLE
COMPARING INPUTS
CASCADING INPUTS
OUTPUTS
A3, B3
A2, B2
A1, B1
A0, B0
IA > B
IA < B
IA = B
OA > B
OA < B
OA = B
A3 > B3
X
X
X
H
X
X
H
L
L
A3 < B3
X
X
X
X
X
X
L
H
L
A3 = B3
A2 > B2
X
X
H
X
X
H
L
L
A3 = B3
A2 < B 2
X
X
X
X
X
L
H
L
A3 = B3
A2 = B 2
A1 > B 1
X
H
X
X
H
L
L
A3 = B3
A2 = B 2
A1 < B 1
X
X
X
X
L
H
L
A3 = B3
A2 = B 2
A1 = B 1
A0 > B 0
H
X
X
H
L
L
A3 = B3
A2 = B 2
A1 = B 1
A0 < B0
X
X
X
L
H
L
A3 = B3
A2 = B 2
A1 = B 1
A0 = B 0
X
L
H
L
L
H
A3 = B3
A2 = B 2
A1 = B 1
A0 = B 0
H
L
L
H
L
L
A3 = B3
A2 = B 2
A1 = B 1
A0 = B 0
X
H
L
L
H
L
A3 = B3
A2 = B 2
A1 = B 1
A0 = B 0
X
H
H
L
H
H
A3 = B3
A2 = B 2
A1 = B 1
A0 = B 0
L
L
L
L
L
L
Notes
1. H = HIGH state (the more positive voltage)
L = LOW state (the less positive voltage)
X = state is immaterial
The upper 11 lines describe the normal operation under all conditions that will occur in a single device or in a serial
expansion scheme.
The lower 2 lines describe the operation under abnormal conditions on the cascading inputs. These conditions occur
when the parallel expansion technique is used.
January 1995
4
Philips Semiconductors
Product specification
HEF4585B
MSI
4-bit magnitude comparator
AC CHARACTERISTICS
VSS = 0 V; Tamb = 25 °C; CL = 50 pF; input transition times ≤ 20 ns
VDD
V
SYMBOL
MIN.
TYP.
MAX.
TYPICAL EXTRAPOLATION
FORMULA
Propagation delays
An, Bn → On
5
HIGH to LOW
10
tPHL
15
5
LOW to HIGH
10
tPLH
15
In → On
5
HIGH to LOW
10
tPHL
15
5
LOW to HIGH
10
tPLH
15
Output transition times
5
HIGH to LOW
133 ns + (0,55 ns/pF) CL
130 ns
54 ns + (0,23 ns/pF) CL
45
90 ns
37 ns + (0,16 ns/pF) CL
150
300 ns
123 ns + (0,55 ns/pF) CL
60
120 ns
49 ns + (0,23 ns/pF) CL
45
90 ns
37 ns + (0,16 ns/pF) CL
110
220 ns
83 ns + (0,55 ns/pF) CL
45
90 ns
34 ns + (0,23 ns/pF) CL
30
60 ns
22 ns + (0,16 ns/pF) CL
120
240 ns
93 ns + (0,55 ns/pF) CL
50
100 ns
39 ns + (0,23 ns/pF) CL
35
70 ns
27 ns + (0,16 ns/pF) CL
10 ns +
60
120 ns
60 ns
9 ns + (0,42 ns/pF) CL
15
20
40 ns
6 ns + (0,28 ns/pF) CL
5
60
120 ns
30
60 ns
9 ns + (0,42 ns/pF) CL
20
40 ns
6 ns + (0,28 ns/pF) CL
10
tTHL
tTLH
15
VDD
V
Dynamic power
320 ns
65
30
10
LOW to HIGH
160
5
10 ns +
(1,0 ns/pF) CL
(1,0 ns/pF) CL
TYPICAL FORMULA FOR P (µW)
1250 fi + ∑ (foCL) × VDD2
where
fi = input freq. (MHz)
dissipation per
10
5500 fi + ∑ (foCL) ×
package (P)
15
15 000 fi + ∑ (foCL) ×
VDD2
VDD2
fo = output freq. (MHz)
CL = load capacitance (pF)
∑ (foCL) = sum of outputs
VDD = supply voltage (V)
APPLICATION INFORMATION
Some examples of applications for the HEF4585B are:
• Process controllers.
• Servo-motor control.
January 1995
5
Philips Semiconductors
Product specification
HEF4585B
MSI
4-bit magnitude comparator
Fig.4 Example of cascading comparators.
January 1995
6
WWW.ALLDATASHEET.COM
Copyright © Each Manufacturing Company.
All Datasheets cannot be modified without permission.
This datasheet has been download from :
www.AllDataSheet.com
100% Free DataSheet Search Site.
Free Download.
No Register.
Fast Search System.
www.AllDataSheet.com