MIC50397 Micrel Semiconductor, MIC50397 Datasheet

MIC50397

Manufacturer Part Number

MIC50397

Description

(MIC50395 - MIC50397) Six Decade Counter / Display Decoder Not Recommended

Manufacturer

Micrel Semiconductor

Datasheet

1.MIC50397.pdf (6 pages)

Current page: 1 of 6
Download datasheet (98Kb)

Pin Connection

MIC50395/50396/50397

General Description

The MIC50395 is an ion-implanted, P-channel MOS six-

decade synchronous up/down-counter/display driver with

compare-register and storage-latches. The counter as well

as the register can be loaded digit-by-digit with BCD data.

The counter has an asynchronous-clear function.

Scanning is controlled by the scan oscillator input which is

self-oscillating or can be driven by an external signal. The

six-decade register is constantly compared to the state of

the six-decade counter and when both the register and the

counter have the same content, an EQUAL signal is gener-

ated. The contents of the counter can be transferred into the

6-digit latch which is then multiplexed from MSD to LSD in

BCD and 7-segment format to the output. The seven-

segment decoder incorporates a leading-zero blanking

circuit which can be disabled by an external signal. This

device is intended to interface directly with the standard

CMOS logic families.

The MIC50396 and MIC50397 operate identically to the

MIC50395 except that two digits in each were reprogrammed

to provide divide by six circuitry instead of divide by ten. The

MIC50396 is well suited for industrial timer applications while

the MIC50397 is best suited for stop watch or real time

computer clock applications.

www.DataSheet4U.com

SEGMENTS

COUNTER

BCD

OUT

STORE

CLEAR

V SS

SET

LZB

C D

C C

C B

C A

MIC50395CN

MIC50396CN

MIC50397CN

D 6

D 5

D 4

D 3

D 2

D 1

UP/DOWN

ZERO

CARRY

COUNT INHIBIT

COUNT

R A

R B

R C

R D

LOAD COUNTER

LOAD REGISTER

EQUAL

V DD

SCAN

8-4

MSD

DIGIT

STROBES

LSD

Ordering Information

Features

• Single power supply

• Schmitt-Trigger on the count-input

• Drives common anode or cathode displays (CA with buffer)

• Six decades of synchronous up/down counting

• Look-ahead carry or borrow

• Loadable counter

• Loadable compare-register with comparator output

• Multiplexed BCD and seven-segment outputs

• Internal scan oscillator

• Direct LED segment drive

• Interfaces directly with CMOS logic

• Leading zero blanking

• MIC50396 programmed to count time:

• MIC50397 programmed to count time:

BCD

Part Number

MIC50395CN

MIC50396CN

MIC50397CN

– 99 hrs. 59 min. 59 sec.

– 59 hrs. 59 min. 99/100 min.

Six Decade Counter / Display Decoder

Not Recommended for New Designs

MIC50395/50396/50397

Segment Identification

Temp. Range

0 C to 70 C

40-pin Plastic DIP

Package

August 1998

Micrel

Related parts for MIC50397

MIC50397 Summary of contents

Page 1

... The MIC50396 and MIC50397 operate identically to the MIC50395 except that two digits in each were reprogrammed to provide divide by six circuitry instead of divide by ten. The MIC50396 is well suited for industrial timer applications while the MIC50397 is best suited for stop watch or real time computer clock applications. Pin Connection V SS ...

Page 2

MIC50395/50396/50397 www.DataSheet4U.com Operations: Six Decade Counter, Latch The six decade counter is synchronously incremented or decremented on the positive edge of the count input signal. A Schmitt trigger on this input provides hysteresis for protec- tion against both a noisy ...

Page 3

MIC50395/50396/50397 www.DataSheet4U.com If external capacitors on the BCD inputs are undesirable, it will be necessary to synchronize the negative going edge of the load register and/or load counter command to coincide with the positive going edge of the scan input ...

Page 4

MIC50395/50396/50397 www.DataSheet4U.com Absolute Maximum Ratings Voltage on Any Terminal Relative to V Operating Temperature Range (Ambient) Storage Temperature Range (Ambient) Maximum Operating Conditions Symbol T Operating Temperature A V Supply voltage ( Supply Current SS B Break Down ...

Page 5

MIC50395/50396/50397 www.DataSheet4U.com Timing 1 2 COUNT UP/DOWN COUNT INHIBIT STORE t PCW CLEAR t CS COUNT t OA ZERO t CA CARRY t EA EQUAL SCAN LOAD COUNTER LOAD REGISTER Loading Counter, Register (1 Digit) LOAD COUNTER OR REGISTER BCD ...

Page 6

MIC50395/50396/50397 www.DataSheet4U.com Dynamic Operating Conditions Symbol f Count Input Frequency CI f Scan Input Frequency SI t Count Pulse Width CPW t Store Pulse Width SPW t Store Setup Time SS t Count Inhibit Setup Time CIS t Up/Down Setup ...

Related keywords

MIC50397 datasheet
MIC50397 data sheet
MIC50397 pdf datasheet
MIC50397 component
MIC50397 part
MIC50397 distributor
MIC50397 RoHS
MIC50397 datasheet download