W55412A

www.DataSheet4U.com W55412A VOICE PROM (256K OTP) GENERAL DESCRIPTION The W55412A is a 256K × 1 bit one-time programmable (OTP) ROM. The W55412A is designed for easy cascading with Winbond speech ICs to emulate sounds and functions. The W55412A data ROM allows synthesis of messages of up to 12 seconds in duration (not including repetition or silence). FEATURES Provides RDP, WRP, and DATA pins to cascade with Winbond speech ICs Data and address are processed in serial form Suitable for low pin count applications (8-pin DIP) Low power consumption: − Operating: 3 mA (max.) − Standby: 1µA (max.) Programming voltage (VPP): 12 to 12.5V Operating voltage range: 3 to 5V Organized as 256K × 1 bit Data access time: 500 nS (max.) PIN CONFIGURATION V PP MCLK/PREDATA VSS WRP 1 2 3 4 8 7 6 5 MODE/PGM/CLK VDD RDP DATA -1- Publication Release Date: May 1996 Revision A2 W55412A PIN DESCRIPTION NO. PIN NAME I/O Read 1 2 3 4 5 6 7 8 VPP MCLK/PREDATA VSS WRP DATA RDP VDD MODE/PGM/CLK I I/O I I/O I/O I I I NC NC Negative power supply Write clock pulse line Bidirectional data line Read clock pulse line Positive voltage supply NC DESCRIPTION Program/Erase/Repair Logic input Logic input Negative power supply No use No use No use Positive voltage supply Logic input BLOCK DIAGRAM MCLK/PREDATA VPP MODE/PGM/CLK VDD VSS RDP WRP DATA 9 8 I/O Control/Address Counter/Register Input Buffer 8 Redundant Array 9 8 Mux 512 X-DEC Core Array Y-DEC/ Mux SenAMP 8 8 1 to 8 De...