LS7031 Datasheet (LSI Computer Systems) - 6 DECADE MOS UP COUNTER WITH 8 DECADE LATCH AND MULTIPLEXER

LS7031, 6 DECADE MOS UP COUNTER WITH 8 DECADE LATCH AND MULTIPLEXER

The LS7031 is a monolithic, ion implanted MOS, 6 decade up counter.

The circuit includes latches, a multiplexer, leading zero blanking and BCD data outputs.

CLOCK GENERATOR The clock for the six decade counter (digit positions 3-8) is formed from the internal ‘OR’ combination of B4/D2 and B8/D2 if

LSI/CSI UL ® LS7031 (631) 271-0400 FAX (631) 271-0405 December 2002 CONNECTION DIAGRAM - TOP VIEW SCAN RESET INPUT MSD STROBE 8 ST R O BE 7 ST R O BE 6 ST R O BE 5 DIGIT STROBE OUTPUTS ST R O BE 4 ST R O BE 3 ST R O BE 2 LSD STROBE 1 DECIMAL POINT INPUT BLANK OUTPUT 1 2 3 4 5 6 7 8 9 10 11 LS7031 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 OSC.

INPUT SCAN INPUT N.C.

B1/D1 B2/D1 N.C.

B4/D1 B8/D1 N.C.

B1/D2 B2/D2 B4/D2 B8/D2 V SS V GG N.C.

N.C.

V DD RESET COUNTER INPUT LOAD LATCH

LS7031 Features

* DC to 7.5 MHz Count Frequency

* Multiplexed BCD Outputs

* DC to 500kHz Scan Frequency

* +4.75V to +15V Operation (VDD-VSS)

* Compatible with CMOS Logic

* High Input Noise Immunity

* Ability to Latch External BCD Data in the two LSD Positions