Product Summary

The MC145443P silicon–gate CMOS single–chip low–speed modem contains a complete frequency shift keying (FSK) modulator, demodulator, and filter. It is with Bell 103 specification. The MC145443P provides full–duplex or half–duplex 300–baud data communication over a pair of telephone lines. It also includes a carrier detect circuit for the demodulator section and a duplexer circuit for direct operation on a telephone line through a simple transformer.

Parametrics

MC145443P absolute maximum ratings: (1)Supply Voltage: -0.5 to + 7.0 V; (2)DC Input Voltage: -0.5 to VDD + 0.5 V; (3)DC Output Voltage: -0.5 to VDD + 0.5 V; (4)Clamp Diode Current, per Pin: ± 20 mA; (5)DC Output Current, per Pin: ± 28 mA; (6)Power Dissipation: 500 mW; (7)Operating Temperature Range: -40 to + 85 ℃; (8)Storage Temperature Range: -65 to + 150 ℃.

Features

MC145443P features: (1)MC145442 Compatible with CCITT V.21; (2)MC145443 Compatible with Bell 103; (3)Low-Band and High-Band Band-Pass Filters On-Chip; (4)Simplex, Half-Duplex, and Full-Duplex Operation; (5)Originate and Answer Mode; (6)Analog Loopback Configuration for Self Test; (7)Hybrid Network Function On-Chip; (8)Carrier Detect Circuit On-Chip; (9)Adjustable Transmit Level and CD Delay Timing; (10)On-Chip Crystal Oscillator (3.579 MHz); (11)Single + 5 V Power Supply Operation; (12)Internal Mid-Supply Generator; (13)Power-Down Mode; (14)Pin Compatible with MM74HC943; (15)Capable of Driving-9 dBm into a 600 W Load.

Diagrams

MC145443P block diagram

MC14000UB
MC14000UB

Other


Data Sheet

Negotiable 
MC14001B
MC14001B

Other


Data Sheet

Negotiable 
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Data Sheet

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Data Sheet

0-1: $0.30
1-25: $0.25
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MC14001BDG

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Data Sheet

0-1: $0.21
1-25: $0.17
25-100: $0.12
100-500: $0.10
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Data Sheet

0-1: $0.33
1-25: $0.25
25-100: $0.18
100-250: $0.14
250-500: $0.11
500-1000: $0.09