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PDF UPD9611GT Data sheet ( Hoja de datos )
| Número de pieza | UPD9611GT | |
| Descripción | FOUR-CHANNEL PCM CODEC | |
| Fabricantes | NEC | |
| Logotipo |  |
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PRELIMINARY DATA SHEET
MOS INTEGRATED CIRCUIT
µPD9611
FOUR-CHANNEL PCM CODEC
The µPD9611 incorporates 4-channel A-law/µ-law PCM CODECs compliant with ITU-T Recommendation G.711/
G.714 and is suitable for applications such as PBX analog subscriber line circuits.
Its gain setting circuit allows transmit/receive gain to be set for 4 channels independently by externally inputting
digital signals.
FEATURES
• Single-chip CMOS monolithic LSI
• ITU-T Recommendation G.711/G.714 compliant
• Four-channel PCM CODECs integrated on a single chip
• Compatible with A-law and µ-law
• Digital gain setting for each channel
• Transmit : +7.5 to –8.0 dB (0.5 dB step)
• Receive : 0 to –15.5 dB (0.5 dB step)
• Data transfer system: Transmit/receive synchronization
• Data rate: 2048 kHz
• +5 V single power supply
• Power down function for each channel
• Low power consumption
ORDERING INFORMATION
Part Number
µPD9611GT
Package
48-pin shrink SOP (375 mil)
The information in this document is subject to change without notice.
Document No. S11018EJ2V0DS00 (2nd edition)
Date Published October 1996 P
Printed in Japan
©
1996
1 page  
Pin No.
28
29
30-32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
Symbol I/O
Name and Function
LAW
I A-law/µ-law select pin in common to four channels
L: A-law, H: µ-law
RST
– Reset input, power-on reset pin
H: normal operation
L : internal registers are in the default status.
NC – Leave this pin open.
DGND
– Digital ground pin
SUBGND
– Substrate ground pin
AGND4
– Analog ground pin for channel 4
AGND3
– Analog ground pin for channel 3
AGND2
– Analog ground pin for channel 2
AGND1
– Analog ground pin for channel 1
ACOMOUT4 O Signal reference voltage output for channel 4
ACOMIN4
I Signal reference voltage input for channel 4
ACOMOUT3 O Signal reference voltage output for channel 3
ACOMIN3
I Signal reference voltage input for channel 3
NC – Leave this pin open.
AOUT3
O Receive analog output pin for channel 3
AIN3
I Transmit analog input pin for channel 3
When not used, connect to ACOMOUT1 pin.
NC – Leave this pin open.
AOUT4
O Receive analog output pin for channel 4
AIN4
I Transmit analog input pin for channel 4
When not used, connect to ACOMOUT1 pin.
µPD9611
5
5 Page 
µPD9611
Table of Gain Setting Codes
(1/2)
Setting Item
Setting
1st Word
2nd Word
Level D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0
Gain setting for transmit +7.5 dB 0 1 – – ch1 ch2 ch3 ch4 1 1 0 1 0 0 0 0
+7.0 dB
11010001
+6.5 dB
11010010
+6.0 dB
11010011
+5.5 dB
11010100
+5.0 dB
11010101
+4.5 dB
11010110
+4.0 dB
11010111
+3.5 dB
11011000
+3.0 dB
11011001
+2.5 dB
11011010
+2.0 dB
11011011
+1.5 dB
11011100
+1.0 dB
11011101
+0.5 dB
0.0 dBNote
11011110
11011111
–0.5 dB
11000000
–1.0 dB
11000001
–1.5 dB
11000010
–2.0 dB
11000011
–2.5 dB
11000100
–3.0 dB
11000101
–3.5 dB
11000110
–4.0 dB
11000111
–4.5 dB
11001000
–5.0 dB
11001001
–5.5 dB
11001010
–6.0 dB
11001011
–6.5 dB
11001100
–7.0 dB
11001101
–7.5 dB
11001110
–8.0 dB
11001111
Note Default setting
11
11 Page | ||
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| PDF Descargar | [ Datasheet UPD9611GT.PDF ] | |
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