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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 For this product, the requirements of MIL-M-38510 have been superseded by MIL-PRF-38535, see 6.3.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 05



OPERATION

Inputs at time tn

Outputs at time tn + 1

G

ACLR

SCLR

LOAD

ENT

ENP

U/D

CLK

A

B

C

D

QA

QB

QC

QD

RCO

CCO

Q OUTPUTS DISABLED   note 3

H

X

X

X

X

X

X

X

X

X

X

X

Z

Z

Z

Z

L if cnt=15

H if cnt , 15

note 1

ASYNCHRONOUS CLEAR

L

L

X

X

X

X

X

X

X

X

X

X

L

L

L

L

H

H

SYNCHRONOUS CLEAR

L

H

L

X

X

X

X

t

X

X

X

X

L

L

L

L

H

H

LOAD

L

H

H

L

X

X

X

t

X

X

X

X

A

B

C

D

L if cnt=15

H if cnt , 15

note 1

COUNT UP

L

H

H

H

L

L

H

t

X

X

X

X

Previous count plus 1

L if cnt=15

H if cnt , 15

note 1

COUNT DOWN

L

H

H

H

L

L

L

t

X

X

X

X

Previous count minus 1

L if cnt=15

H if cnt , 15

note 1


INHIBIT COUNT

L

H

H

H

X

H

X

X

X

X

X

X


No change (hold)


note 2


note 1

L

H

H

H

H

X

X

X

X

X

X

X

L

H

H

H

H

H

X

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.  RCO produces a low level pulse while the count is 15 when counting up, or while the count is 0 when counting down.

3.  Counting continues.


QA

QB

QC

QD

RCO

CCO

L

L

L

L

H

H

L

L

L

H

H

H

L

L

H

L

H

H

L

L

H

H

H

H

L

H

L

L

H

H

L

H

L

H

H

H

L

H

H

L

H

H

L

H

H

H

H

H

H

L

L

L

H

H

H

L

L

H

H

H

H

L

H

L

H

H

H

L

H

H

H

H

H

H

L

L

H

H

H

H

L

H

H

H

H

H

H

L

H

H

H

H

H

H

L

note 1


FIGURE 3.  Truth tables - Continued.


20




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