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Calculator CPU ICs: M58347P

 
Mitsubishi M58347P Calculator IC
ID: M58347P Used in: Sanyo CY5322DP
Type: Calculator IC, four function, 12+1 digit, four function memory, switch floating/fixed modes, printer
Maker: Mitsubishi
Typical date range: Mid to late 1980s
Package: 42 pin DIL 0.6" width black plastic
Date coding system: Unknown
Notes:

Pin-outs and near example circuitry is shown for your information.

Pins
a-g and "," : display segments and decimal point
G1 to G13: display grid signal for each digit, and keyboard multiplexing
K0 to K3 and K0' and K3': keyboard and switch multiplex lines
TM, MT, S, RP and ZT are printer controls
MS1 and MS2 are rounding and fixed decimal controls
ACL looks like a clear on power up automatic clear

Voltages are given for this example
V
LL  -30V
V
GG -15V
V
ss 0V