MSM7512B

E2A0014-16-X0 ¡ Semiconductor MSM7512B Semiconductor 1200 bps Half Duplex FSK Modem – ITU-T V.23 This version: MSM7512B Jan. 1998 Previous version: Nov. 1996 GENERAL DESCRIPTION The MSM7512B is useful for the ITU-T V.23 modem, for examples, low cost built-in modems, telecontrol systems, home security systems, etc. The family version, MSM7510 for ITU-T V.21, will be available following this device. Oki has been mass-producing and delivering the MSM6926 and 6927 for a long time, but these devices need two power supplies, +5 V for digital and +12 V for analog. New generation devices, MSM7510/7512B, work with single rail +3 V to +5 V and low power consumption. FEATURES Conforms to ITU-T V.23, 1200 bps Half Duplex Conforms to ITU-T V.23, 75 bps transmitter Single Power Supply: +3 V to +5 V Low Power Consumption Operating Mode: 25 mW Typ. Power Down Mode: 0.1 mW Max. Line Hybrid Circuit on Chip Line Direct Drive Capability of Analog Output 3.579545 MHz Crystal Oscillator Digital Interface: TTL Package options: 16-pin plastic DIP (DIP16-P-300–2.54) (Product name: MSM7512BRS) 24-pin plastic SOP (SOP24-P-430-1.27–K) (Product name: MSM7512BGS-K) 1/12 Semiconductor MSM7512B BLOCK DIAGRAM AI (2) + – Demodulator FSK & ANS Bandpass Filter Modulator *R3 *R2 – *R1 *R1 *R2 *R2 + AOG RD (9) CD (10) XD (11) RS (12) AO (3) EAI (4) X1 (6) X2 (7) CLK (8) VDD (1) GND (5) TEST (13) OSC CLK GEN. CONT. MOD2 (15) SG GEN. AOG (16) MOD1 (14) * R1 to R3 ≥ 50 kW ( ) : fo...