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MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
8-Bit Priority Encoder
The MC14532B is constructed with complementary MOS (CMOS)
enhancement mode devices. The primary function of a priority encoder is to
provide a binary address for the active input with the highest priority. Eight
data inputs (D0 thru D7) and an enable input (E in) are provided. Five outputs
are available, three are address outputs (Q0 thru Q2), one group select (GS)
and one enable output (E out ).
Diode Protection on All Inputs
Supply Voltage Range = 3.0 Vdc to 18 Vdc
Capable of Driving Two Low–power TTL Loads or One Low–Power
Schottky TTL Load over the Rated Temperature Range
Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î
MAXIMUM RATINGS*
(Voltages Referenced to V SS )
Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î
Symbol
Parameter
V DD
DC Supply Voltage
V in , V out
Input or Output Voltage (DC or Transient)
I in , I out
Input or Output Current (DC or Transient),
per Pin
P D
Power Dissipation, per Package†
T stg
Storage Temperature
T L
Lead Temperature (8–Second Soldering)
* Maximum Ratings are those values beyond which damage to the device may occur.
†Temperature Derating:
Plastic "P and D/DW" Packages: – 7.0 mW/ _ C From 65 _ C To 125 _ C
Ceramic "L" Packages: – 12 mW/ _ C From 100 _ C To 125 _ C
Input
E in
D7
D6
D5
D4
0
X
X
X
X
1
0
0
0
0
1
1
X
X
X
1
0
1
X
X
1
0
0
1
X
1
0
0
0
1
1
0
0
0
0
1
0
0
0
0
1
0
0
0
0
1
0
0
0
0
X = Don't Care
This device contains protection circuitry to guard against damage
due to high static voltages or electric fields. However, precautions must
be taken to avoid applications of any voltage higher than maximum rated
voltages to this high-impedance circuit. For proper operation, V in and
V out should be constrained to the range V SS
Unused inputs must always be tied to an appropriate logic voltage
level (e.g., either V SS or V DD ). Unused outputs must be left open.
MOTOROLA CMOS LOGIC DATA
Value
– 0.5 to + 18.0
– 0.5 to V DD + 0.5
– 65 to + 150
TRUTH TABLE
D3
D2
D1
D0
GS
Q2
X
X
X
X
0
0
0
0
0
0
0
0
X
X
X
X
1
1
X
X
X
X
1
1
X
X
X
X
1
1
X
X
X
X
1
1
1
X
X
X
1
0
0
1
X
X
1
0
0
0
1
X
1
0
0
0
0
1
1
0
(V in or V out )
Unit
V
V
10
mA
500
mW
_ C
_ C
260
Output
Q1
Q0
E out
0
0
0
0
0
1
1
1
0
1
0
0
0
1
0
0
0
0
1
1
0
1
0
0
0
1
0
0
0
0
V DD .
MC14532B
L SUFFIX
CERAMIC
CASE 620
P SUFFIX
PLASTIC
CASE 648
D SUFFIX
SOIC
CASE 751B
ORDERING INFORMATION
MC14XXXBCP
Plastic
MC14XXXBCL
Ceramic
MC14XXXBD
SOIC
T A = – 55 to 125 C for all packages.
PIN ASSIGNMENT
D4
1
16
V DD
D5
2
15
E out
D6
3
14
GS
D7
4
13
D3
E in
5
12
D2
Q2
6
11
D1
Q1
7
10
D0
V SS
8
9
Q0
MC14532B
6–341
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