mh88632 Mitel, mh88632 Datasheet
mh88632
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mh88632 Summary of contents
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... The Mitel MH88632 Central Office Trunk Interface circuit provides a complete audio and signalling link between audio switching equipment and a central office. The functions provided by the MH88632 include 2-4 Wire Hybrid conversion, programmable transmit and receive gains, programmable line impedance and programmable network balance. The ...
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... MH88632 TIP RING XLA XLB XLC XLD IC GRD IC IC RGND VRLY LRD BRD LRC BRC GRC AGND NATT N1 Pin Description Pin # Name 1 TIP Tip Lead. Connects to the “Tip” or “Ring” lead of Central Office. 2 RING Ring Lead. Connects to the “Ring” or “Tip” lead of the Central Office. ...
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... Ring Voltage Detect (Output). A logic low indicates that ringing voltage is across the Tip and Ring leads. Note that this output toggles at the ringing cadence and not at the ringing frequency. Description + 1k // 210nF); the device’s input impedance must be set to 600 . Node. Connects to Z1 for a line impedance of 900 . This node MH88632 2-237 ...
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... To meet the regulatory high voltage requirements, an external protection circuit is required. The protection circuit shown in Figure 9 is matched to the MH88632 and ensures than they meet the high voltage requirements of FCC, DOC, CSA and UL when installed in a properly designed system. ...
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... The 4-Wire side can be interfaced to a filter/codec such as the Mitel MT896X, for use in digital voice switched systems. Line Impedance The MH88632’s Tip-Ring impedance (Z to 600 , 900 user selectable value. Thus, Zin can be set to any international requirements. The connection to Z1 determines the input impedance. ...
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... Examples: Sweden : Load is 900 in a parallel with 30nF. This is synthesised on the MH88632 by 1.5k with a parallel combination of 3nF and 7.4k . Norway : Load is 120 in series with a parallel combination of 820 and 110nF. This is synthesized on the MH88632 by 1.5k in series with a parallel combination of 12nF and 7.8k . ...
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... 100 510 2 † Sym Min Typ REN 18 0 +30 +1.0 MH88632 Sym Min Max Units -0.3 20 RLY T -55 +125 S Units Comments Max Units Test Conditions 137 mW ...
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... MH88632 Loop Electrical Characteristics (Continued) Characteristics 9 RL Threshold Tip-Ring Voltage Detect Tip-Ring Current Detect 10 TG and RG Detect Threshold † DC Electrical Characteristics are over recommended operating conditions unless otherwise stated Typical figures are with nominal AC Electrical Characteristics Characteristics 1 2-wire Input Impedance ...
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... Results in 0dB overall gain when used with Mitel A-law codec (i.e. MT8965) Results in 0dB overall gain when used with Mitel -law codec (i.e. MT8964) Results in 0dB overall gain when used with Mitel A-law codec (i.e. MT8965) Results in 0dB overall gain when used with Mitel -law codec (i.e. MT8964) MH88632 Max Units Test Conditions % THD< ...
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... MH88632 MH88632 Z 10k Z Figure 3 - Gain Programming with External Components 2-244 RTX 28 GTX1 GTX0 27 10k - 10k RRX 30 GRX1 GRX0 29 10k Preliminary Information : TRANSMIT GAIN (Tip-Ring to Tx) AV= -20log (0.5+5k ) RTX RTX = 5k (-AV/20) 10 -0.5 Example RTX = 38k ; AV = +4dB RECEIVE GAIN: (RX to Tip-Ring) AV= -20log (0 RRX ...
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... Make connection between Z1 and component as short as possible. Figure 5 - Input Impedance ( Settings with Settings with Z in MH88632 MH88632 Z900 32 NC Z600 Input Impedance (Z ) set to 900 in equal to 600 or 900 RS ...
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... Figure 7 - Network Balance Setting with NETBAL not equal to Z 2-246 Network balance is set to the AT&T compromise network (350 impedance. The input impedance must be set to 600 . NETBAL VDD . ) in Preliminary Information MH88632 NATT 1000 // 210nF) or AT& ZNetbal = 0.1 x ...
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... Zin must be 600 NA LRC (Input) Low High Low High Low High High or Low RG (Output) High Low High Low MH88632 Resulting input impedance ( 600 900 0.1 x impedance between Z1 & Z2 Resulting input impedance ( Equivalent 210nF) 0.1 x impedance between N1 & (Output) ...
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... SEE FIGURE 9 FOR PROTECTION CIRCUIT 2) CONFIGURED FOR 0dB GAIN, 600 3) K1, 2 E/M FORM E/M 1 FORM C 5) R1, R2 30. 470 , 5 K2 REQUIRED FOR GS ONLY Figure 8 - Typical LS-GS Application Circuit 2-248 K2A 48V BATTERY R1 R2 K2B MH88632 28 1 GTX1 TIP 27 GTX0 RING 30 GRX1 29 ...
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... R1, 2, 2.4 5% 1/2W 350V, FLAME RATED RESISTOR i.e, ALLEN BRADLEY EB24G5, DALE/VISHAY LCA 0411NE 2 RV1 250VAC, 35J, METAL OXIDE VARISTOR i.e., HARRIS, V250LA10, OHIZUMI 0250NC12D Figure 9 - External Protection Applications Circuit PROTECTION CIRCUITRY F1 R1 RV1 RV3 RV2 F2 R2 MH88632 MH88632 1 TIP 2 RING AGND 18 2-249 ...
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... MH88632 TIP PROTECTION CIRCUIT RING LOOP RELAY CONTROL NOTES: 1) SEE FIGURE 9 FOR PROTECTION CIRCUIT 2) CONFIGURED FOR 0dB GAIN, 600 3) K1, E/M 2 FORM C 2-250 MH88632 28 1 GTX1 TIP 27 GTX0 RING 30 GRX1 29 GRX0 13 LRD VRLY Z600 11 RGND LRC 16 BRC ...
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... Preliminary Information 0.080 Max (2.0 Max) Side View 0.010 + 0.002 (0.25 + 0.05) 0.12 Max (3.1 Max) Notes: 1) Not to scale 2) Dimensions in inches). 3) (Dimensions in millimetres). *Dimensions to centre of pin & tolerance non accumulative. 0.58+0.02 (14.7+0. 0.05 + 0.01 (1.3 + 0.5) * 0.25 + 0.02 (1.3 + 0.05) Figure 11 - Mechanical Data MH88632 4.20 + 0.020 (107 + 1. 0.18 + 0.02 (4 0.100 + 0.10 0.020 + 0.05 (2.54 + 0.13) (0.51 + 0.13) 2-251 ...
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... MH88632 Notes: 2-252 Preliminary Information ...