Si3056
S i 3 0 1 8 / 1 9 / 10
G
LOBAL
S
ERIAL
I
NTERFACE
D
IRECT
A
CCESS
A
RRANGEMENT
Features
Complete DAA includes the following:
Programmable line interface
AC termination
DC termination
Ring detect threshold
Ringer impedance
80 dB dynamic range TX/RX paths
Integrated codec and 2- to 4-wire
hybrid
Integrated ring detector
Type I and II caller ID support
Line voltage monitor
Loop current monitor
Polarity reversal detection
Programmable digital gain
Clock generation
Pulse dialing support
Overload detection
3.3 V power supply
Direct interface to DSPs
Serial interface control for up to eight
devices
>5000 V isolation
Proprietary isolation technology
Parallel handset detection
+3.2 dBm TX/RX level mode
Programmable digital hybrid for near-
end echo reduction
Low-profile SOIC packages
Lead-free/RoHS-compliant packages
available
Ordering Information
See page 88.
Pin Assignments
Si3056
MCLK
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
OFHK
RGDT/FSD/M1
M0
V
A
GND
AOUT/INT
C1A
C2A
Applications
V.92 modems
Voice mail systems
Multi-function printers
Set-top boxes
Fax machines
Internet appliances
Personal digital
assistants
FSYNC
SCLK
V
D
SDO
SDI
FC/RGDT
RESET
Description
The Si3056 is an integrated direct access arrangement (DAA) with a
programmable line interface to meet global telephone line requirements. Available
in two 16-pin small outline packages, it eliminates the need for an analog front end
(AFE), isolation transformer, relays, opto-isolators, and a 2- to 4-wire hybrid. The
Si3056 dramatically reduces the number of discrete components and cost
required to achieve compliance with global regulatory requirements. The Si3056
interfaces directly to standard modem DSPs.
Si3018/19/10
QE
DCT
RX
IB
C1B
C2B
VREG
RNG1
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
DCT2
IGND
DCT3
QB
QE2
SC
VREG2
RNG2
Functional Block Diagram
Si3056
MCLK
SCLK
FSYNC
SDI
SDO
FC/RGDT
Si3018/19/10
RX
Digital
Interface
Hybrid and
dc
Termination
Isolation
Interface
Isolation
Interface
IB
SC
DCT
VREG
VREG2
DCT2
DCT3
RNG1
RNG2
QB
QE
QE2
US Patent # 5,870,046
US Patent # 6,061,009
Other Patents Pending
RGDT/FSD/M1
OFHK
M0
RESET
AOUT/INT
Control
Interface
Ring Detect
Off-Hook
Rev. 1.05 6/05
Copyright © 2005 by Silicon Laboratories
Si3056
Si3056
Si3018/19/10
T
A B L E
Section
OF
C
O N T E N TS
Page
1. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2. Typical Application Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3. Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4. AOUT PWM Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5. Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.1. Upgrading from the Si3034/35/44 to Si3056 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.2. Line-Side Device Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.3. Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.4. Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
5.5. Isolation Barrier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.6. Transmit/Receive Full Scale Level (Si3019 Line-Side Only) . . . . . . . . . . . . . . . . . . . 25
5.7. Parallel Handset Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.8. Line Voltage/Loop Current Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.9. Off-Hook . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.10. Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.11. DC Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.12. AC Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.13. Transhybrid Balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.14. Ring Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.15. Ring Validation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
5.16. Ringer Impedance and Threshold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.17. Pulse Dialing and Spark Quenching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.18. Billing Tone Protection and Receive Overload . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.19. Billing Tone Filter (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.20. On-Hook Line Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.21. Caller ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.22. Overload Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
5.23. Gain Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
5.24. Filter Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
5.25. Clock Generation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
5.26. Digital Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
5.27. Multiple Device Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
5.28. Power Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
5.29. Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
5.30. In-Circuit Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
5.31. Exception Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
5.32. Revision Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
6. Control Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
Appendix—UL1950 3rd Edition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
7. Pin Descriptions: Si3056 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84
8. Pin Descriptions: Si3018/19/10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Rev. 1.05
3
Si3056
Si3018/19/10
1. Electrical Specifications
Table 1. Recommended Operating Conditions
Parameter
1
Ambient Temperature
Si3056 Supply Voltage, Digital
3
Symbol
T
A
V
D
Test Condition
F and K-Grade
Min
2
0
3.0
Typ
25
3.3
Max
2
70
3.6
Unit
°C
V
Notes:
1.
The Si3056 specifications are guaranteed when the typical application circuit (including component tolerance) and the
Si3056 and any Si3018 or Si3019 are used. See Figure 17 on page 18 for typical application schematic.
2.
All minimum and maximum specifications are guaranteed and apply across the recommended operating conditions.
Typical values apply at nominal supply voltages and an operating temperature of 25 °C unless otherwise stated.
3.
3.3 V applies to both the digital and serial interface and the digital signals RGDT/FSD, OFHK, RESET, M0, and M.
Rev. 1.05
5
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