W91031SG Nuvoton Technology Corporation of America, W91031SG Datasheet - Page 27

• Manufacturer Part Number: W91031SG
• Description: IC CALL LINE IDENT 24-SOIC
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W91031SG

• Function: Caller ID Device
• Interface: FSK
• Number Of Circuits: 1
• Voltage - Supply: 3 V ~ 5 V
• Current - Supply: 2.5mA
• Operating Temperature: 0°C ~ 75°C
• Mounting Type: Surface Mount
• Package / Case: *
• Includes: FSK Demodulator, Line Reversal Detector, Ring Detector
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power (watts): -

Notes:
1. In a CPE where AC power is not available, the designer may choose to switch over to line power when the CPE goes
2. The FSKE pin should be set low to enable the alert tone detector when the dual tone alert signal is expected.
3. The exchange will have already disabled the speech path to the distant customer in both transmission directions.
4. The FSKE may be set high as soon as the CPE has finished sending the acknowledge signal ACK.
5. FSKE should be set low when FCDN has become inactive.
6. In unsuccessful attempts where the exchange does not send the FSK signal, the CPE should disable FSKE, unmute the
off-hook and use battery power while on-hook.
handset and enable the keypad after this interval.
Tip/Ring
SLEEP
INTN
ALGO
FSKE
FCDN
FDRN
DCLK
DATA
Note 1
CPE goes off-hook
Figure 9-6. Input and Output Timing of BT Loop State (Off-hook) Data Transmission
Start Point
Note 2
A = 40 50 mS
C =
E = 5 100 mS
G = Depends on data length
Note 3
t
REC
A
Alert Signal
100 mS
B
CPE mutes handset & disables keypad
C
t
ABS
CPE sends
ACK
D
- 27 -
Note 4
Note 6
E
B = 80 85 mS
D = 65 75 mS
F = 45 75 mS
H
Mark
F
100 mS
Publication Release Date: August 2000
Preliminary W91031
Message
Data
G
...
...
CPE unmutes handset
and enables keypad
Note 5
H
Revision A1