• Provides Cascading Feature to Handle Any Number of
Inputs
• Group Select Indicates One or More Priority Inputs
• Standardized Symmetrical Output Characteristics
• 100% Tested for Quiescent Current at 20V
• Maximum Input Current of 1µA at 18V Over Full Package Temperature Range; 100nA at 18V and +25
• Noise Margin (Over Full Package/Temperature Range)
- 0.5V at VDD = 5V
- 1.5V at VDD = 10V
- 1.5V at VDD = 15V
• 5V, 10V and 15V Parametric Ratings
• Meets All Requirements of JEDEC Tentative Standard
No. 13B, “Standard Specifications for Description of
‘B’ Series CMOS Devices”
Applications
CMOS 8-Bit Priority Encoder
Pinout
CD4532BMS
TOP VIEW
VDD
1
D4
2
D5
D6
3
4
D7
5
EI
Q2
6
o
C
Q1
VSS
7
8
Functional Diagram
D7
PRIORITY
SELECT
16
E0
15
GS
14
D3
13
D2
12
D1
11
D0
10
Q0
9
ENCODER
Q2
Q1
Q0
• Priority Encoder
• Binary or BCD Encoder (Keyboard Encoding)
• Floating Point Arithmetic
Description
CD4532BMS consists of combinational logic that encodes
the highest priority input (D7 - D0) to a 3-bit binary code. The
eight inputs, D7 through D0, each have an assigned priority;
D7 is the highest priority and D0 is the lowest. The priority
encoder is inhibited when the chip-enable input E1 is low.
When E1 is high, the binary representation of the highestpriority input appears on output lines Q2 - Q0, and the group
select line GS is high to indicate that priority inputs are
present. The enable-out (EO) is high when no priority inputs
are present. If any one input is high, EO is low and all cascaded lower-order stages are disabled.
The CD4532BMS is supplied in these 16-lead outline packages:
Braze Seal DIPH4T
2. The parameters listed on Table 3 are controlled via design or process and are not directly tested. These parameters are characterized
on initial design release and upon design changes which would affect these characteristics.
3. CL = 50pF, RL = 200K, Input TR, TF < 20ns.
UNITSMINMAX
TABLE 4. POST IRRADIATION ELECTRICAL PERFORMANCE CHARACTERISTICS
LIMITS
PARAMETERSYMBOLCONDITIONSNOTESTEMPERATURE
UNITSMINMAX
Supply CurrentIDDVDD = 20V, VIN = VDD or GND1, 4+25oC-25µA
N Threshold VoltageVNTHVDD = 10V, ISS = -10µA1, 4+25oC-2.8-0.2V
N Threshold Voltage
∆VTNVDD = 10V, ISS = -10µA1, 4+25oC-±1V
Delta
P Threshold VoltageVTPVSS = 0V, IDD = 10µA1, 4+25oC0.22.8V
P Threshold Voltage
∆VTPVSS = 0V, IDD = 10µA1, 4+25oC-±1V
Delta
FunctionalFVDD = 18V, VIN = VDD or GND1+25oCVOH >
VDD/2
Propagation Delay TimeTPHL
VDD = 3V, VIN = VDD or GND
VDD = 5V1, 2, 3, 4+25oC-1.35 x
TPLH
VOL <
VDD/2
ns
+25oC
Limit
NOTES: 1. All voltages referenced to device GND.
2. CL = 50pF, RL = 200K, Input TR, TF < 20ns.
3. See Table 2 for +25oC limit.
4. Read and Record
TABLE 5. BURN-IN AND LIFE TEST DELTA PARAMETERS +25oC
PARAMETERSYMBOLDELTA LIMIT
Supply Current - MSI-2IDD± 1.0µA
Output Current (Sink)IOL5± 20% x Pre-Test Reading
Output Current (Source)IOH5A± 20% x Pre-Test Reading
V
7-1230
Page 5
Specifications CD4532BMS
TABLE 6. APPLICABLE SUBGROUPS
MIL-STD-883
CONFORMANCE GROUP
Initial Test (Pre Burn-In)100% 50041, 7, 9IDD, IOL5, IOH5A
Interim Test 1 (Post Burn-In)100% 50041, 7, 9IDD, IOL5, IOH5A
Interim Test 2 (Post Burn-In)100% 50041, 7, 9IDD, IOL5, IOH5A
PDA (Note 1)100% 50041, 7, 9, Deltas
Interim Test 3 (Post Burn-In)100% 50041, 7, 9IDD, IOL5, IOH5A
NOTE: 1. 5% Parameteric, 3% Functional; Cumulative for Static 1 and 2.
CONFORMANCE GROUPS
Group E Subgroup 250051, 7, 9Table 41, 9Table 4
METHODGROUP A SUBGROUPSREAD AND RECORD
TABLE 7. TOTAL DOSE IRRADIATION
MIL-STD-883
METHOD
PRE-IRRADPOST-IRRADPRE-IRRADPOST-IRRAD
TESTREAD AND RECORD
TABLE 8. BURN-IN AND IRRADIATION TEST CONNECTIONS
OSCILLATOR
FUNCTIONOPENGROUNDVDD9V ± -0.5V
Static Burn-In 1
(Note 1)
Static Burn-In 2
(Note 1)
Dynamic BurnIn (Note 1)
Irradiation
(Note 2)
NOTES:
1. Each pin except VDD and GND will have a series resistor of 10K ± 5%, VDD = 18V ± 0.5V
2. Each pin except VDD and GND will have a series resistor of 47K ± 5%; Group E, Subgroup 2, sample size is 4 dice/wafer, 0 failures,
VDD = 10V ± 0.5V
6, 7, 9, 14, 151 - 5, 8, 10 - 1316
6, 7, 9, 14, 1581 - 5, 10 - 13, 16
-85, 166, 7, 9, 14, 151 - 4, 10 - 13
6, 7, 9, 14, 1581 - 5, 10 - 13, 16
50kHz25kHz
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