Si3038
G
L O B A L
M C ’ 9 7 S
I L I C O N
DAA
Features
Complete DAA includes:
AC’97 2.1 Compliant
Primary or Secondary Codec
Global Phone Line Interface
Compliant with FCC, CTR21,
JATE, and Other PTTs
84 dB Dynamic Range TX/RX
Paths
3.3 V or 5 V Power Supply
Greater than 3000 V Isolation
Integrated Ring Detector
Wake-Up On Ring
Caller ID Support
Integrated Analog Front End
2- to 4-Wire Hybrid
Low-Power Standby Mode
Low Profile SOIC Packages
Patented ISOcap™ Technology
Ordering Information:
See page 59.
Applications
Software Modems
Audio/Telephony Sub-Systems
Audio/Modem Riser Cards (AMR)
Mobile Daughter Cards (MDC)
Mini-PCI Cards
Pin Assignments
Si3024 (SOIC)
MCLK/XIN
XOUT
BIT_CLK
V
D
SDA TA _IN
SDA TA _OUT
SY NC
RESET
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
GPIO_A
GPIO_B
ID1
V
A
GND
C1A
ID0
A OUT
Description
The Si3038 is an integrated direct access arrangement (DAA) chipset that
provides a digital, programmable line interface to meet global telephone
line requirements. Available in two 16-pin small outline packages (AC’97
interface on Si3024 and phone-line interface on Si3014), the chipset
eliminates the need for an analog front end (AFE), an isolation
transformer, relays, opto-isolators, and a 2- to 4-wire hybrid. The Si3038
dramatically reduces the number of discrete components and cost
required to achieve compliance with global regulatory requirements. The
Si3024 complies with the AC’97 2.1 specification.
Si3024 (TSSOP)
SDA TA _IN
SDA TA _OUT
SY NC
RESET
A OUT
ID0
C1A
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
D
BIT_CLK
XOUT
MCLK/XIN
GPIO_A
GPIO_B
ID1
V
A
Functional Block Diagram
Si3024
XOUT
MCLK/XIN
RESET
BIT_CLK
SYNC
SDATA_IN
SDATA_OUT
AC'97
Digital
Interface
Clock
Hybrid
and
DC
Termination
Si3014
Si3014 (SOIC or TSSOP)
RX
QE2
FILT
FILT2
REF
DCT
VREG
VREG2
REXT
REXT2
RNG1
RNG2
QB
QE
QE2
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
FILT2
FILT
RX
REXT
REXT2
REF
V REG2
V REG
DCT
IGND
C1B
RNG1
RNG2
QB
QE
Isolation
Interface
Isolation
Interface
ID0
ID1
G PIO_A
G PIO_B
Control
Interface
Ring Detect
Off-Hook
US Patent # 5,870,046
US Patent # 6,061,009
Other Patents Pending
Si3038-DS201
Rev. 2.01 9/01
Copyright © 2001 by Silicon Laboratories
Si3038
T
A B L E O F
C
O N T E N TS
Section
Page
4
16
17
19
20
22
22
22
23
23
24
24
24
25
25
26
26
26
27
28
28
28
29
29
29
29
29
30
30
30
30
30
30
31
36
37
38
53
54
55
57
59
60
61
64
3
Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical Application Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Analog Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AC-Link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Isolation Barrier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Off-Hook . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Termination Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AC Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ring Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ringer Impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wake-Up on Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTMF Dialing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pulse Dialing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Billing Tone Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Billing Tone Filter (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
On-Hook Line Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Caller ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loop Current Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overload Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Analog Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gain Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filter Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In-Circuit Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Digital Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Si3024 as Secondary Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Si3024 as Primary MC’97 Codec . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Si3024 Connection to the Digital AC’97 controller . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clocking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Resetting Si3038 Chipset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AC-Link Digital Serial Interface Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Codec Register Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AC-Link Low Power Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix A—UL1950 3rd Edition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix B—CISPR22 Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pin Descriptions: Si3024 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pin Descriptions—Si3014 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SOIC Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TSSOP Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rev. 2.01
Si3038
Electrical Specifications
Table 1. Recommended Operating Conditions
Parameter
1
Ambient Temperature
3
Si3024 Supply Voltage, Analog
Si3024 Supply Voltage, Digital
4
Si3024 Supply Voltage, Digital
4
Symbol
T
A
V
A
V
D
V
D
V
A
= 5 V
V
A
= Charge Pump
Test Condition
K-Grade
Min
2
0
4.75
4.75
3.0
Typ
25
5.0
5.0
3.3
Max
2
70
5.25
5.25
3.6
Unit
°C
V
V
V
Notes:
1.
The Si3038 specifications are guaranteed when the typical application circuit (including component tolerances) of
Figure 19 on page 16 and any Si3024 and Si3014 are used.
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.
The temperature specifications are guaranteed when using the typical application circuit on a 4 sq. in. minimum FR4
PCB. For other materials and smaller form factors, heat dissipation factors may apply. Contact Silicon Laboratories for
more details.
4.
The digital supply, V
D,
can operate from either 3.3 V or 5.0 V. The Si3024 supports interface to 3.3 V logic when
operating from 3.3 V. 3.3 V operation applies to both the AC’97 Digital Interface and the digital signals RESET, ID0, and
ID1.
4
Rev. 2.01
DIY/Open Source Hardware
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