W91031S Winbond Electronics, W91031S Datasheet - Page 6

• Manufacturer Part Number: W91031S
• Manufacturer: Winbond Electronics

Specifications of W91031S

• Process Technology: CMOS
• Operating Frequency (max): 3580kHz
• Mounting: Surface Mount
• Supply Current: 2.5mA
• Lead Free Status / Rohs Status: Not Compliant

BLOCK DIAGRAM
FUNCTIONAL DESCRIPTION
Figure 6 is shown functional blocks of W91031. The device must operate with a 3.579545 MHz
system clock and consists four major functions and decribed as follows:
Ring Detector
The application circuit in Figure 7-1 illustrates the relationship between the RNGDI, RNGRC and
RNGON signals. The three pin combination is used to detect an increase of the RNGDI voltage from
ground to a level above the Schmitt trigger high going threshold voltage V
SLEEP/
RESET
GCFB
VREF
VDD
VSS
INN
INP
+
-
Bias Voltage
OSCI OSCO
Generator
Input Pre-processor
Clock Driver
Oscillator
&
To internal
circuit
To internal
Anti-alias
circuit
Filter
Figure 6. The Block Diagram of Winbond Caller ID
High Tone
Low Tone
Bandpass
Bandpass
Power Saving
FSK Bandpass
Filter
Filter
Circuit
Filter
- 6 -
FSK Demodulation Circuit
Dual Tone Alert Signal Detection Circuit
High Tone
Low Tone
Detector
Detector
RNGDI
Demodulator
FSK Carrier
Detector
FSK
Ring Detector
FSKE
RNGRC
Preliminary W91031
Circuit
Guard
Time
Data Output
T+
MODE
Interface
FSK
RNGON
.
Generator
Interrupt
FCDN
ALGRC
DCLK
DATA
FDRN
ALGR
INTN
ALGO