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CXA1563M/S View Datasheet(PDF) - Sony Semiconductor

Part Name
Description
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CXA1563M/S Datasheet PDF : 15 Pages
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CXA1563M/S
Application Note
The CXA1563M/S is a dual channel Dolby B-C type NR IC with a built-in S type (CXA1417S/Q) switch. By
using the CXA1563M/S in conjunction with two sets of the CXA1417S/Q encoder unit, a stereo Dolby B-C-S
type NR system can be achieved.
1) Power Supply
The CXA1563M/S is designed to operate on either single or dual power supply.
For dual power supply, connect VCT (Pin 28) to GND, and VEE (Pin 14) to the negative power supply.
For single power supply, connect VEE (Pin 14) to GND. Vcc/2, generated from the internal circuit, is output to
VCT (Pin 28). Connect a by-pass capacitor between this pin and GND.
The operating voltage range is ±3.5 to ±8.0V (7.0 to 16V), which satisfies the signal handling of 12dB
specified by the Dolby Laboratories.
2) Supply Voltage of the CXA1417S/Q and the CXA1563M/S
(1) When both have split power supply
Set within the respective specified ranges.
CXA1417S/Q: ±AV
CXA1563M/S: ±BV
(2) When both have single power supply
Set at the same potential with the range specified for the CXA1417S/Q (9 to 13V).
CXA1417S/Q: AV
CXA1563M/S: BV
(3) Single and dual power supplies can not be used together.
3) Operation Mode Control
The CXA1563M/S has built-in electronic switches. The operations are controlled by the DC voltages of SSW
(Pin 12), NRSW (Pin 13) and MODE (Pin 16) control pins. Table 1 shows the switching truth tables.
For single power supply, VH, VM, and VL correspond to Vcc, Vcc/2 and GND, respectively.
For dual power supply, VH, VM and VL correspond to Vcc, GND and VEE, respectively.
Refer to "threshold" on the characteristics graph for the thresholds of the control voltages. NRSW (Pin 13)
and MODE (Pin 16) control pins are connected to VCT via a 50kresistor, so when the pin is open, VM
condition results. SSW (Pin 12) control pin is of PNP base input, so the pin can be used as VH when it is
open.
VH
VM
SSW B-C type
NRSW C type
B type
MPX ON
MODE REC
(Encode)
MPX OFF
REC
(Encode)
Table 1
VL
S type
NR OFF
PB
(Decode)
SSW is taken precedence over NRSW, and NRSW is invalid when SSW is at Low.
– 10 –
 

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