ST7538P STMicroelectronics, ST7538P Datasheet - Page 21

• Manufacturer Part Number: ST7538P
• Description: Telecom Line Management ICs 1/2 Duplex FSK Modem
• Manufacturer: STMicroelectronics
• Type: Single Chipr

Specifications of ST7538P

• Product: Modem Chip
• Supply Voltage (max): 5.25 V, 12.5 V
• Supply Voltage (min): 4.75 V, 7.5 V
• Supply Current: 5 mA, 370 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Package / Case: TQFP-44
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 11. Control Register Functions
■
■
■
■
■
■
9 to 10
0 to 2
3 to 4
7 to 8
Zero Crossing Synchronization
Detection Method
Mains Interfacing Mode
Output Clock
Input Pre-Filter
Sensitivity Mode
11
5
6
Synchronization
detection time
Zero Crossing
Transmission
Frequencies
Baud Rate
Frequency
Watchdog
Function
Deviation
Time Out
Enabled (1.5 s)
82.05 KHz
132.5 KHz
Not Used
110 KHz
Disabled
Disabled
Disabled
Enabled
60 KHz
66 KHz
72 KHz
76 KHz
86 KHz
500 µs
Value
1,200
2,400
4,800
1 ms
3 ms
5 ms
600
0.5
1 s
3 s
1
Bit2
Bit 10
Bit 13
0
0
0
0
1
1
1
1
Bit 4
Bit 8
0
0
1
1
0
0
1
1
0
0
1
1
Selection
Bit 11
Bit 5
Bit 6
Bit1
0
1
0
1
0
1
0
0
1
1
0
0
1
1
Bit 12
Bit 3
Bit 7
Bit 9
0
1
0
1
0
1
0
1
0
1
0
1
Bit0
0
1
0
1
0
1
0
1
Note
132.5 kHz
Disabled
Enabled
Default
1 sec
2400
1 ms
ST7538
0.5
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