W681388
Revision 1.1 - 01/2008
Winbond W681388
Single Programmable Extended CODEC/SLIC
The W681388 implements a single channel FXS telephone
line interface optimized for short loop applications. It integrates
SLIC (Subscriber Line Interface Circuit) functionality with a
programmable CODEC and a DC-to-DC controller. The SLIC
supports internal ringing up to 90 VPK (5 REN at 4 kft), ideal
for customer premise equipment (CPE). The CODEC can be
configured for μ-law/A-law or 16-bit linear PCM encoding and
supports a comprehensive set of signaling capabilities
required to supervise and control both telephone lines. These
include tone generation (including ring tones), DTMF
generation and detection as well as FSK and metering pulse
generation. An on-chip pulse width modulation (PWM) driver
allows the control of DC-to-DC conversion for the line.
Programmable impedance and transhybrid balancing allow for
worldwide deployment.
APPLICATIONS
Analog Telephone Adapter
Voice enabled DSL Modems
Voice enabled Cable Modems
Residential VoIP Gateways / Routers
Integrated Access Devices
Fiber to the Premise/Home (FTTP/H)
Optical Network Terminals (ONT)
Set Top Boxes
Wireless Local Loop
PBX
FEATURES
Performs complete BORSCHT functions for a single channel
with a single device
Internal balanced ringing up to 90VPK (5REN up to 4kft)
Integrated Power Management
▫ Integrated DC-DC controller regulates battery voltage to
minimize power dissipation in all operating modes
Programmable linefeed characteristics
▫ Ringing frequency, amplitude, cadence
▫ Trapezoidal and Sinusoidal waveforms
▫ Two-wire AC impedance, transhybrid balance
▫ Constant Current feed (20 to 41mA)
▫ Ring trip and loop closure thresholds
Programmable signal generation
▫ DTMF generation and detection
▫ Metering pulse generation (12/16kHz)
▫ Enhanced Caller ID (FSK) generation (Type I and Type II)
▫ Tone generation (up to four simultaneous)
▫ G.711 μ-Law/A-Law / 16-bit linear PCM audio
Loop test and diagnostics support
▫ Integrated loopback modes
▫ Realtime linefeed monitoring
▫ On-chip temperature sensor
PCM and SPI bus digital interfaces
▫ PCM Master and Slave modes supported
On-chip PLL for flexible clocking options including 1MHz / 2MHz
3.3V operation
Small Footprint Packages: LQFP-48, QFN-48
DC/DC Supervision
Loop Supervision
Conditioning Signaling
Metering Pulse
Generation
DTMF
Generation
FSK
Generation
Ringing
Generation
DTMF
Detection
PCM Filters
Gain Adjust
Ring Trip
Detection
Loop Closure
Detection
Loop
Supervision
DC feed
Algorithm
Line
Diagnostic
Z matching
& TransHybrid
DC / DC
Control
Sigma/delta
DAC
Sigma/delta
ADC
Thermal
Supervision
Mode
Control
Loopback
Control
SPI
PCM
PLL
Line Feed
DACs
Line Monitor
ADC
Tone
Generation
DC/DC Supervision
Loop Supervision
Conditioning Signaling
Metering Pulse
Generation
DTMF
Generation
FSK
Generation
Ringing
Generation
DTMF
Detection
PCM Filters
Gain Adjust
Ring Trip
Detection
Loop Closure
Detection
Loop
Supervision
DC feed
Algorithm
Line
Diagnostic
Z matching
& TransHybrid
DC / DC
Control
Sigma/delta
DAC
Sigma/delta
ADC
Sigma/delta
DAC
Sigma/delta
ADC
Thermal
Supervision
Mode
Control
Loopback
Control
SPI
PCM
PLL
Line Feed
DACs
Line Monitor
ADC
Line Feed
DACs
Line Monitor
ADC
Tone
Generation
W681388
Revision 1.1 - 01/2008
Application Example: Analog Telephone Adapter (AT A) s upporting 1 voice port
W681388
48-Lead QFN/LQFP
1
2
3
4
5
6
7
8
9
10
11
12
36
35
34
33
32
31
30
29
28
27
26
25
SCLK
SDI
SDO
DCN
DCP
GND3
VDDL
VDD3
PCMT
FS
BCLK
PCMR
13 14 15 16 17 18 19 20 21 22 23 24
RIP
RIN
OTAPS
OTAPF
GND1
OTANF
OTANS
NC2
NC3
TEST
INT
CS
48 47 46 45 44 43 42 41 40 39 38 37
CR
CT
VREF1
VREF2
IREF
GND2
VDD2
DCL
DCH
RESET
GND2
NC4
NC1
VDD1
VDD1
TIP
TIN
RVE
BAT
TVE
RDC
TDC
RAC
TAC
Note: For more details on the W681388, please refer to Winbond America’s web site at: http://www.winbond-usa.com
Part Number Package Notes
W681388DG LQFP-48 Pb-Free
W681388YG QFN-48 Pb-Free
BENEFITS
High integration reduces overall system BOM and
footprint
Low power consumption for battery-backup and other
power sensitive applications
High programmability reduces real-time software
overhead
Extensive line sensing enables diagnostics support
W681388 ORDERING INF ORMATION
© 2008 All Rights Reserved Printed in the U.S.A
PCM
t / r
Analog
Control SPI
Ethernet
VoIP
Processor
Discrete
Front End
Protection
W681388
Single
Programmable
Extended
CODEC
DC-D C Converter
PCM
t / r
Analog
Control SPI
Ethernet
VoIP
Processor
Discrete
Front End
Protection
W681388
Single
Programmable
Extended
CODEC
DC-D C Converter
