SI2434-C-FTR Silicon Laboratories Inc, SI2434-C-FTR Datasheet - Page 60

• Manufacturer Part Number: SI2434-C-FTR
• Description: Modem Chip Chipset 33.6Kbps 24-Pin TSSOP T/R
• Manufacturer: Silicon Laboratories Inc

Specifications of SI2434-C-FTR

• Package: 24TSSOP
• Main Category: Chipset
• Sub-category: ISOmodem
• Maximum Data Rate: 33.6 Kbps
• Typical Operating Supply Voltage: 3.3 V
• Power Supply Type: Digital
• Typical Supply Current: 26 mA
• Minimum Operating Supply Voltage: 3 V
• Maximum Operating Supply Voltage: 3.6 V

Si2457/34/15/04
U79 GEN4
Reset settings = 0x0000
60
Name
15:5
Type
Bit
4:0
Bit
LVCS[4:0] Line Voltage Current Sense.
Reserved Read returns zero.
D15
Name
D14
Represents either the line voltage, loop current, or on-hook line monitor.
On-Hook Voltage Monitor (2.75 V/bit ±20%).
00000 = No line connected.
00001 = Minimum line voltage (V
11111 = Maximum line voltage (87 V ± 20%).
The line voltage monitor full scale may be modified by changing R5 as follows:
V
Off-Hook Loop Current Monitor (3 mA/bit).
00000 = No loop current.
00001 = Minimum loop current.
11110 = Maximum loop current.
11111 = Loop current is excessive (overload).
LVCS is backward compatible with Si2456/33/14 ISOmodems. The LVCS value is absolute
and does not reflect loop polarity. See U6C (LVS)[15:8] for 1 V/bit resolution and signed twos
complement output
D13
MAX
= V
D12
Overload > 140 mA in all modes except TBR21
Overload > 54 mA in TBR21 mode
MIN
+ 4.2 (10M + R5 + 1.6k)/(R5 +1.6k)/5
D11
D10
D9
Rev. 1.1
MIN
D8
= 3.0 V ± 0.5 V).
Function
D7
D6
D5
D4
D3
LVCS[4:0]
D2
R
D1
D0