MH88437-P

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


Application

Interface to Central Office or PABX line for:
• FAX/Modem
• Electronic Point of Sale
• Security System
• Telemetry
• Set Top Boxes


Pinout




Specifications

	Parameter	Sym	ITRIP	Max	Units	Comments
1	DC Supply Voltage	VCC	-0.3	6	V
2	Storage Temperature	TS	-55	+125	°C
3	DC Loop Voltage	VTR	-110	+110	V
4	Transient loop voltage	VTR		300	V	1ms On hook
5	Ringing Voltage	VR		150	Vrms	VBAT = -56V
6	Loop Current	ILOOP		60	mA	CL =0 VTIP-RING 40V CL =1
				90	mA
7	Ring Trip Current	ITRIP		180	mArms	250ms 10% duty cycle or 500ms single shot

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 MH88437 suitable for most countries worldwide.