dm9316 National Semiconductor Corporation, dm9316 Datasheet

dm9316

Manufacturer Part Number

dm9316

Description

Synchronous 4-bit Counters

Manufacturer

National Semiconductor Corporation

Datasheet

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C 1995 National Semiconductor Corporation

9316 DM9316 Synchronous 4-Bit Counters

General Description

These synchronous presettable counters feature an inter-

nal carry look-ahead for application in high-speed counting

designs The 9316 is a 4-bit binary counter The carry output

is decoded by means of a NOR gate thus preventing spikes

during the normal counting mode of operation Synchronous

operation is provided by having all flip-flops clocked simulta-

neously so that the outputs change coincident with each

other when so instructed by the count-enables inputs and

internal gating This mode of operating eliminates the output

counting spikes which are normally associated with asyn-

chronous (ripple clock) counters A buffered clock input trig-

gers the four flip-flops on the rising (positive-going) edge of

the clock input waveform

These counters are fully programmable that is the outputs

may be preset to either level As presetting is synchronous

setting up a low level at the load input disables the counter

and causes the outputs to agree with the setup data after

the next clock pulse regardless of the levels of the enable

input Low-to-high transitions at the load input are perfectly

acceptable regardless of the logic levels on the clock or

enable inputs The clear function is asynchronous and a low

level at the clear input sets of the flip-flop outputs low re-

gardless of the levels of clock load or enable inputs

Connection Diagram

TL F 6606

Order Number 9316DMQB 9316FMQB DM9316J

See NS Package Number J16A N16E or W16A

DM9316W or DM9316N

Dual-In-Line Package

The carry look-ahead circuitry provides for cascading coun-

ters for n-bit synchronous applications without additional

gating Instrumental in accomplishing this function are two

count-enable inputs and a ripple carry output Both count-

enable inputs (P and T) must be high to count and input T is

fed-forward to enable the ripple carry output The ripple car-

ry output thus enabled will produce a high-level output pulse

with a duration approximately equal to the high-level portion

of the Q

can be used to enable successive cascaded stages High-

to-low level transitions at the enable P or T inputs may occur

regardless of the logic level in the clock

Features

Internal look-ahead for fast counting

Carry output for n-bit cascading

Synchronous counting

Load control line

Diode-clamped inputs

Typical clock frequency 35 MHz

Pin-for-pin replacements popular 54 74 counters

5416A 7416A (binary)

Alternate Military Aerospace device (9316) is available

Contact a National Semiconductor Sales Office Distrib-

utor for specifications

output This high-level overflow ripple carry pulse

TL F 6606 – 1

RRD-B30M105 Printed in U S A

June 1989

Related parts for dm9316

dm9316 Summary of contents

Page 1

... DM9316 Synchronous 4-Bit Counters General Description These synchronous presettable counters feature an inter- nal carry look-ahead for application in high-speed counting designs The 9316 is a 4-bit binary counter The carry output is decoded by means of a NOR gate thus preventing spikes during the normal counting mode of operation Synchronous ...

Page 2

Absolute Maximum Ratings If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Supply Voltage Input Voltage Operating Free Air Temperature Range Military b Commercial Storage Temperature Range b Recommended Operating ...

Page 3

Switching Characteristics Symbol Parameter f Maximum Clock Frequency MAX t Propagation Delay Time PLH Low to High Level Output t Propagation Delay Time PHL High to Low Level Output t Propagation Delay Time PLH Low to High Level Output t ...

Page 4

Logic Diagram 9316 6606 – 2 ...

Page 5

Timing Diagram Typical Clear Preset Count and Inhibit Sequences Sequence (1) Clear outputs to zero (2) Preset to binary twelve (3) Count to thirteen fourteen fifteen zero one and two (4) Inhibit 9316 Synchronous Binary Counters 6606 ...

Page 6

Parameter Measurement Information Note A The input pulses are supplied by a generator having the following characteristics PRR Vary PRR to measure f MAX Note B Outputs Q and carry are tested at t for 9316 8316 where t D ...

Page 7

Parameter Measurement Information Note A The input pulses are supplied by generators having the following characteristics PRR Note B Enable P and Enable T setup times are measured at t Note REF (Continued) Switching Time ...

Page 8

8 ...

Page 9

... Physical Dimensions inches (millimeters) 16-Lead Ceramic Dual-In-Line Package (J) Order Number 9316DMQB or DM9316J 16-Lead Molded Dual-In-Line Package (N) NS Package Number J16A Order Number DM9316N NS Package Number N16E 9 ...

Page 10

... Physical Dimensions inches (millimeters) (Continued) 16-Lead Ceramic Flat Package (W) Order Number 9316FMQB or DM9316W LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION As used herein ...

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