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MH88437-P Datasheet(PDF) 1 Page - Mitel Networks Corporation |
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MH88437-P Datasheet(HTML) 1 Page - Mitel Networks Corporation |
1 / 16 page 1 Features • FAX and Modem interface (V.34/V.34+) • Designed to work at data rates up to 56kbits • External programmable line and network balance impedances • Programmable DC termination characteristics • IEC950 recognised component • Transformerless 2-4 Wire conversion • Integral Loop Switch • Dial Pulse and DTMF operation • Accommodates parallel phone detection • Line state detection outputs: -loop current/ringing voltage/line voltage • +5V operation, low on-hook power (25mW) • Full duplex voice and data transmission • On-Hook reception from the line • Meets French current limit requirements • Conforms to German dial pulse standards • Approvable to UL 1950 • Industrial Temperature Range Available Applications Interface to Central Office or PABX line for: • FAX/Modem • Electronic Point of Sale • Security System • Telemetry • Set Top Boxes Description The Mitel MH88437 Data Access Arrangement (D.A.A.) provides a complete interface between audio or data transmission equipment and a telephone line. All functions are integrated into a single thick film hybrid module which provides high voltage isolation, very high reliability and optimum circuit design, needing a minimum of external components. The impedance and network balance are externally programmable, as are the DC termination characteristics, making the device suitable for most countries worldwide. Figure 1 - Functional Block Diagram Opto- Isolation Logic Input Buffer Isolation Isolation Isolation Analog Buffer Analog Buffer Buffer THL cancellation impedance matching circuit Isolation Barrier VCC AGND LC VR+ VX RV TIP RING User Connections Network Connections Input Buffer & VLOOP1 Ring & Loop Line Termination VLOOP2 VR- NB1 NB2 LOOP LCD ZA RS VBIAS and line CL DS5060 ISSUE 4 October 1998 Package Information MH88437AD-P 28 Pin DIL Package MH88437AS-P 28 Pin SM Package 0˚C to 70˚C MH88437AD-PI Ind. Temp. DIL Variant -40˚C to +80˚C MH88437AS-PI Ind. Temp. SM Variant -40˚C to + 80˚C MH88437-P Data Access Arrangement Advance Information |
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