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MIL-M-38510-380 Microcircuits, Digital, Bipolar, Advanced Low Power Schottky Ttl, Binary Counters, Cascadable, Monolithic SiliconThis specification covers the detail requirements for monolithic silicon, advanced low power Schottky TTL, binary counters. Two product assurance classes and a choice of case outlines and lead finishes are provided for each type and are reflected in the complete part number. For this product, the requirements of MIL-M-38510 have been superseded by MIL-PRF-38535, see 6.3.

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MIL-M-38510/380B


DEVICE TYPE 04



OPERATION

Inputs at time tn

Outputs at time tn + 1

G

ACLR

ALOAD

SCLR

SLOAD

ENT

ENP

CLK

A

B

C

D

QA

QB

QC

QD

RCO

CCO

Q OUTPUTS DISABLED   note 2

H

X

X

X

X

X

X

X

X

X

X

X

Z

Z

Z

Z

H if cnt=15

L if cnt , 15

note 1

ASYNCHRONOUS CLEAR

L

L

X

X

X

X

X

X

X

X

X

X

L

L

L

L

L

L

ASYNCHRONOUS LOAD

L

H

L

X

X

X

X

X

X

X

X

X

A

B

C

D

H if cnt=15

L if cnt , 15

note 1

SYNCHRONOUS CLEAR

L

H

H

L

X

X

X

t

X

X

X

X

L

L

L

L

L

L

SYNCHRONOUS LOAD

L

H

H

H

L

X

X

t

X

X

X

X

A

B

C

D

H if cnt=15

L if cnt , 15

note 1

COUNT

L

H

H

H

H

H

H

t

X

X

X

X

Previous count plus 1

H if cnt=15

L if cnt , 15

note 1

INHIBIT COUNTING

L

H

H

H

H

X

L

X

X

X

X

X


No change

H if cnt=15

L if cnt , 15


note 1

L

H

H

H

H

L

X

X

X

X

X

X

L

H

H

H

H

L

L

X

X

X

X

X


NOTES:

1.  CCO produces a high level pulse for a duration equal to that of the low level of the clock when RCO is high and the counter is enabled, otherwise CCO is high.

2.  Counting continues.


COUNT UP SEQUENCE

QA

QB

QC

QD

RCO

CCO

L

L

L

L

L

L

L

L

L

H

L

L

L

L

H

L

L

L

L

L

H

H

L

L

L

H

L

L

L

L

L

H

L

H

L

L

L

H

H

L

L

L

L

H

H

H

L

L

H

L

L

L

L

L

H

L

L

H

L

L

H

L

H

L

L

L

H

L

H

H

L

L

H

H

L

L

L

L

H

H

L

H

L

L

H

H

H

L

L

L

H

H

H

H

H

note 1


FIGURE 3.  Truth tables - Continued.


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