UPD75P108B

DATA SHEET MOS INTEGRATED CIRCUIT µPD75P108B 4-BIT SINGLE-CHIP MICROCOMPUTER DESCRIPTION The µPD75P108B is a version of the µPD75108 in which the on-chip mask ROM is replaced by one-time PROM which can be written to once only, or EPROM which is capable of program write, erasure and rewrite. Also, since the µPD75P108B is capable of program write by a user, it can easily be exchanged with the mask version, allowing evaluation at low voltage. Detailed functional descriptions are shown in the following User’s Manual. Be sure to read for designations. µPD751×× Series User’s Manual : IEM-922 FEATURES Version with on-chip PROM, allowing low-voltage operation VDD = 2.7 to 6.0 V µPD75108 compatible Memory capacity Program memory (PROM) : 8064 × 8 bits Data memory (RAM) : 512 × 4 bits Correspondence to QTOP™ microcomputer ORDERING INFORMATION Ordering Code Package 64-pin plastic shrink DIP (750 mil) 64-pin ceramic shrink DIP (with window) 64-pin plastic QFP (14 × 20 mm, 1.0 mm pitch) On-Chip ROM One-time PROM EPROM One-time PROM µ PD75P108BCW µ PD75P108BDW µ PD75P108BGF-3BE Note 5 There is no on-chip pull-up resistor function by means of a mask option. QUALITY GRADE Standard Please refer to “Quality grade on NEC Semiconductor Devices” (Document number IEI-1209) published by NEC Corporation to know the specification of quality grade on the devices and its recommended applications. In this ducument, common parts of one-time PROM products and EPROM products are repr...