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PDF MSA4709A Data sheet ( Hoja de datos )
| Número de pieza | MSA4709A | |
| Descripción | Subscriber Line Interface Circuit | |
| Fabricantes | OKI | |
| Logotipo |  |
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E2A0032-16-X0
¡¡SemicondSucetormiconductor
MSA4709A
Subscriber Line Interface Circuit
This version: MJaSnA. 41799089A
Previous version: Nov. 1996
GENERAL DESCRIPTION
The MSA4709A is designed to provide BSH functions and to meet PABX transmission performance
requirements.
This device provides two-wire to four-wire conversion function (Hybrid).
FEATURES
• B (Battery feed), S (Supervision), and H (Hybrid) functions integrated on chip.
• Design to meet Central Office and PABX quality transmission requirements.
• All transmission performance parameters can be externally programmable.
• Free from parasitic SCR's using dielectric isolation technology.
• Size and weight reduction over conventional approaches.
• Supply voltage selectable (VBB = –24 V/–48 V).
• 1 channel built-in relay driver.
• Package:
30-pin plastic Shrink DIP (SDIP30-P-400-1.78) (Product name: MSA4709ASS)
1/11
Free Datasheet http://www.datasheet-pdf.com/
1 page  
¡ Semiconductor
MSA4709A
Pin No.
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Name
SEL
CDP
IL
VBS
BF
RI
VCC
ZX
CB
G
PB
PE
B
NC
Description
SCN output information select control input. At SEL = "L", SCN Indicates only ground/
battery fault condition.
Dial pulse shaping capacitor input.
Tip to Ring constant loop current determination resistor input.
Supply voltage selection terminal.
VBS = VCC (–24 V), VBS = G (–48 V).
Battery-feed mode control input. A logic level "H" switches off both the Ring and Tip
current drive amp. and presents a high impedance to the line. (apr. 80 kW).
Relay driver control input. RI = "H" is Driver "ON"
+5 V input
2 wire terminating impedance compornent Zx input. This pin has a low input
impedance.
Compensation capacitor input.
This capacitor value is 4700 pF(35V).
Ground input.
The base drive output for the PNP Darlington power transistor.
The Tip current sensing input is connected to the emitter of the PNP Darlington power
transister and the power resistor REB.
The Tip voltage sensing input. This input is high impedance (apr. 37 kW) and is
connected to the built-in over voltage protection circuit.
No connection
5/11
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¡ Semiconductor
PACKAGE DIMENSIONS
SDIP30-P-400-1.78
MSA4709A
(Unit : mm)
Package material
Lead frame material
Pin treatment
Solder plate thickness
Package weight (g)
Epoxy resin
42 alloy
Solder plating
5 mm or more
1.80 TYP.
11/11
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11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet MSA4709A.PDF ] | |
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