MT91600AN Zarlink Semiconductor, MT91600AN Datasheet
MT91600AN
Related parts for MT91600AN
MT91600AN Summary of contents
Page 1
Features • Transformerless conversion • Controls battery feed to line • Programmable line impedance • Programmable network balance impedance • Off-hook and dial pulse detection • Ring ground over-current protection • Programmable gain • Programmable constant current ...
Page 2
MT91600 Pin Description Pin # Name 1 VDD Positive supply rail, +5V Tip Drive (Output). Controls the Tip transistor Tip Feed. Connects to the Tip transistor and to the TIP lead via the Tip feed resistor. ...
Page 3
Preliminary Information Pin Description (continued) Pin # Name 22 X2 Gain Node 2. Networks, either resistive or complex, are connected between this node, VR and GND to set the Network Balance Impedance for the SLIC filter capacitor ...
Page 4
MT91600 The value of k can be set by the designer to be any value between 20 and 250. Three rules to ensure the correct operation of the circuit: (A) R18 + R19 > 50k ( R2. (C) ...
Page 5
Preliminary Information When using DTMF signalling only i.e. pulse dialling is not used, the capacitor, C7, can be permanently connected to ground and does not require to be switched out during dialling. Power up Sequence The circuit should be powered ...
Page 6
MT91600 Gain -1dB, Gain -1dB Step 1: Gain Setting (R12, R13, R14, R15) Gain Log [ R13 / R12 Log [R13 / R12] ...
Page 7
Preliminary Information A numerical example: Given 220 Lr = 325 (2.5km of 28 gauge wire, averaged at 65 /km) DCRP = 200 Pd(max) = 1.5W Vbat = -48V +/- 10% (i.e. -43V to -53V) Therefore: R23(max) = (43/30mA) ...
Page 8
MT91600 SHK RLYC Q4 VRLY BAT V BAT Q1 D2a D2b R1 TIP R21 PR1 R20 RING R2 V BAT K1a D3a VDD 90 Vrms ~ BAT=-48V Q3 ...
Page 9
Preliminary Information Component List* for a Typical Application with a Resistive 600 Line Impendance - Figure 5 for component designation and recommended configuration R1 220 1% (0.15% matched 43k R5 220 R11 55k R13 ...
Page 10
MT91600 Absolute Maximum Ratings* Parameter 1 DC Supply Voltages 2 Ringing Voltages 3 Voltage setting for Loop Current 4 Overvoltage Tip/GND Ring/GND, Tip/Ring 5 Ringing Current 6 Ring Ground over-current 7 Storage Temp 8 Package Power Dissipation 9 ESD Rating ...
Page 11
Preliminary Information DC Electrical Characteristics Characteristics 1 Supply Current 2 Power Consumption 3 Constant Current Line Feed 4 Programmable Loop Current Range 5 Operating Loop (inclusive of Telephone Set) 6 Off Hook Detection Threshold 7 RLYC Input Low Voltage Input ...
Page 12
MT91600 AC Electrical Characteristics Characteristics 1 Ring Trip Detect Time 2 Output Impedance Gain 4-2 @ 1kHz 4 Gain Relative to 1kHz 5 Transhybrid Loss 6 Gain 2-4 @ 1kHz 7 Gain Relative to 1kHz 8 Return ...
Page 13
Preliminary Information Test Circuits Figures 6,7,8,9,10 are for illustrating the principles involved in making measurements and do not necessarily reflect the actual method used in production testing ...
Page 14
MT91600 Long. Bal. = 20*Log CMR = 20*Log Gain = 20*Log(2*V /V ...
Page 15
...
Page 16
... For more information about all Zarlink products Information relating to products and services furnished herein by Zarlink Semiconductor Inc. trading as Zarlink Semiconductor or its subsidiaries (collectively “Zarlink”) is believed to be reliable. However, Zarlink assumes no liability for errors that may appear in this publication, or for liability otherwise arising from the application or use of any such information, product or service or for any infringement of patents or other intellectual property rights owned by third parties which may result from such application or use ...