CIRRUS CRD4299-1

CRD4299-1 AMR
CrystalClear™ AC '97 AMR Reference Design
Features
Description
l AMR
The CRD4299-1 AMR add-in board reference design
showcases Cirrus Logic’s Crystal Audio AC ’97 CS4299
SoundFusion, and is Audio/Modem Riser Specification[2], compliant. The CRD4299-1 AMR card is 2.7"
high by 3.6" long.
Audio Codec add-in card designed to
meet the Intel® Audio/Modem Riser
Specification
l High quality, low cost, 2-layer, single sided
adapter board
l CS4299 SoundFusion® Audio Codec ’97
l Complete suite of Analog and Digital I/O
connections:
- Line In, Line Out, Mic In, Modem Audio
connection, CD Audio In, Video In, Aux In,
Headphone Out and Optical Digital Out
l Meets
or exceeds Microsoft’s PC 97, PC 98,
and PC 99, both required and advanced,
audio performance requirements.
The CRD4299-1 AMR reference design includes a customer ready manufacturing kit. Included in the kit are a
full set of schematic design files (OrCAD® 7.2 format),
PCB job files (PADS®ASCII), PCB artwork files
(Gerber) , bracket drawings, and bill of materials. The
design is production ready as is, or can be easily
modified to incorporate specific OEM changes. Documentation source files are available to assist the OEM to
quickly provide an accurate end user manual.
ORDERING INFO
CRD4299-1 AMR
CS4299
Preliminary Product Information
P.O. Box 17847, Austin, Texas 78760
(512) 445 7222 FAX: (512) 445 7581
http://www.cirrus.com
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
Copyright  Cirrus Logic, Inc. 1999
(All Rights Reserved)
OCT ‘99
DS319RD1A1
1
CRD4299-1 AMR
TABLE OF CONTENTS
1. GENERAL INFORMATION ............................................................................ 4
2. REFERENCE DESIGN FEATURES ............................................................... 4
2.1 Digital Audio Out .................................................................................. 4
2.2 CS4299 Audio Codec ‘97 .................................................................... 4
2.2.1 Power Requirements .................................................................. 5
2.3 Analog I/O ............................................................................................ 5
2.4 Audio I/O .............................................................................................. 5
2.4.1 Line Out ...................................................................................... 5
2.4.2 Headphone Out .......................................................................... 5
2.4.3 Line In ........................................................................................ 5
2.4.4 Mic In .......................................................................................... 5
2.4.5 CD Audio In ................................................................................ 6
2.4.6 Aux In ......................................................................................... 6
2.4.7 Video In ...................................................................................... 6
2.4.8 Modem Audio Connection .......................................................... 6
3. SCHEMATIC DESCRIPTION ......................................................................... 7
3.1 Figure 11: Block Diagram .................................................................... 7
3.2 Figure 12: AMR Bus Interface ............................................................. 7
3.3 Figure 13: Power Supply ..................................................................... 7
3.4 Figure 14: CS4299 AC ‘97 Audio Codec ............................................. 7
3.5 Figure 15: Analog Inputs ...................................................................... 7
3.6 Figure 16: Audio Outputs ..................................................................... 8
3.7 Figure 17: Microphone Pre-amp and Bias ........................................... 8
3.8 Component Selection .......................................................................... 8
3.9 EMC Components ............................................................................... 8
4. GROUNDING AND LAYOUT ......................................................................... 9
4.1 Partitioned Voltage and Ground Planes .............................................. 9
4.2 CS4299 Layout Notes .......................................................................... 9
5. AUDIO PERFORMANCE EVALUATION ..................................................... 10
5.1 Plots ................................................................................................... 10
6. REFERENCES .............................................................................................. 17
7. ADDENDUM ................................................................................................. 17
8. BILL OF MATERIALS .................................................................................. 25
Contacting Cirrus Logic Support
For a complete listing of Direct Sales, Distributor, and Sales Representative contacts, visit the Cirrus Logic web site at:
http://www.cirrus.com/corporate/contacts/
CrystalClear is a trademark of Cirrus Logic, Inc.
Intel is a registered trademark of Intel Corporation.
OrCAD is a registered trademark of OrCAD, Inc.
SoundFusion is a registered trademark of Cirrus Logic, Inc.
Preliminary product information describes products which are in production, but for which full characterization data is not yet available. Advance product information describes products which are in development and subject to development changes. Cirrus Logic, Inc. has made best efforts to ensure that the information
contained in this document is accurate and reliable. However, the information is subject to change without notice and is provided “AS IS” without warranty of
any kind (express or implied). No responsibility is assumed by Cirrus Logic, Inc. for the use of this information, nor for infringements of patents or other rights
of third parties. This document is the property of Cirrus Logic, Inc. and implies no license under patents, copyrights, trademarks, or trade secrets. No part of
this publication may be copied, reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photographic, or
otherwise) without the prior written consent of Cirrus Logic, Inc. Items from any Cirrus Logic website or disk may be printed for use by the user. However, no
part of the printout or electronic files may be copied, reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical,
photographic, or otherwise) without the prior written consent of Cirrus Logic, Inc.Furthermore, no part of this publication may be used as a basis for manufacture
or sale of any items without the prior written consent of Cirrus Logic, Inc. The names of products of Cirrus Logic, Inc. or other vendors and suppliers appearing
in this document may be trademarks or service marks of their respective owners which may be registered in some jurisdictions. A list of Cirrus Logic, Inc. trademarks and service marks can be found at http://www.cirrus.com.
2
DS319RD1A1
CRD4299-1 AMR
LIST OF FIGURES
Figure 1. Full Duplex (A-D-PC-D-A): Line In/Out Frequency Response ..................................... 10
Figure 2. Full Duplex (A-D-PC-D-A): Line In/Out Dynamic Range .............................................. 10
Figure 3. Full Duplex (A-D-PC-D-A): Line In/Out THD+N vs. Frequency ................................... 11
Figure 4. Analog Mixer (A-A): Line In/Out Frequency Response ................................................ 11
Figure 5. Analog Mixer (A-A): Line In/Out Dynamic Range ........................................................ 12
Figure 6. Analog Mixer (A-A): Line In/Out THD+N vs. Frequency .............................................. 12
Figure 7. Analog Mixer (A-A): Mic In/Line Out Frequency Response ......................................... 13
Figure 8. Analog Mixer (A-A): Mic In/Line Out Dynamic Range .................................................. 13
Figure 9. Analog Mixer (A-A): Mic In/Line Out THD+N vs. Frequency ........................................ 14
Figure 10. Analog Mixer (A-A): Line In/Out Crosstalk vs. Frequency ......................................... 14
Figure 11. Block Diagram ............................................................................................................. 16
Figure 12. AMR Bus ..................................................................................................................... 17
Figure 13. Power Supplies ........................................................................................................... 18
Figure 14. CS4299 ....................................................................................................................... 19
Figure 15. Audio In ....................................................................................................................... 20
Figure 16. Audio Out .................................................................................................................... 21
Figure 17. Mic Pre-Amp ............................................................................................................... 22
Figure 18. Assembly Drawing ...................................................................................................... 23
Figure 19. Top Layer .................................................................................................................... 24
Figure 20. Bottom Layer ............................................................................................................... 25
Figure 21. Bracket Drawing .......................................................................................................... 26
LIST OF TABLES
Table 1. Reference Designators ..................................................................................................... 9
Table 2. Microphone Support Specifications................................................................................... 9
Table 3. Full Duplex Specifications ................................................................................................. 9
Table 4. Analog Mixer, Line In to Line Out Specifications............................................................... 9
Table 5. Analog Mixer, Mic In to Line Out Specifications................................................................ 9
DS319RD1A1
3
CRD4299-1 AMR
1. GENERAL INFORMATION
The CRD4299-1 AMR is a production-grade
AMR audio card reference design using the
CS4299 SoundFusion Audio Codec ‘97. The design supports the functionally compatible CS4299,
CS4297A, or CS4297 AC ‘97 SoundFusion Audio
Codecs.
The AMR board advantage lies in the complete
separation of the analog section from the noisy digital environment of a personal computer. A 5-wire
digital link is all that is required to connect the audio codec to the PCI bus-based AC ‘97 controller.
This allows the audio section to reach the required
dynamic range of ~90 dB FS A while making the
layout and placement of the audio section easier to
implement. The CS4299 performs the Digital-toAnalog Conversion (DAC) for the digital audio
output stream and also provides multiple analog
audio inputs and outputs, analog mixing and Analog-to-Digital Conversion (ADC).
This card is designed to provide the highest possible functionality, along with industry leading audio
performance at a low manufacturing cost. Care was
taken with component placement and signal routing to minimize sources that can degrade audio performance. Cirrus’ analog design know-how has
resulted in a board that preserves the exceptional
analog performance of the CS4299.
dec. Digital out is provided through a Toshiba
TOTX173 optical TOS-LINK jack on the board
edge. There are many advantages in using a fiber
optic link versus the traditional coaxial link. Fiber
optic is a non-metallic insulator thereby preventing
ground loops and electromagnetic interference.
For signal transmission, it offers low attenuation,
high bandwidth, low propagation delay, low bit error rates, small size, and cost efficiency. The signal
is IEC 958 and CP-1201 compliant.
2.2 CS4299 Audio Codec ‘97
The CS4299 is a mixed-signal serial Codec based
on the AC ‘97 specification revision 2.1 [1]. It is
designed to be paired with a digital controller, located on the PCI bus. The AC ‘97 Controller is responsible for all communications between the
CS4299 and the rest of the system. The CS4299
functions as an analog mixer, a stereo ADC, a stereo DAC, and a control and digital audio stream interface to the AC ‘97 controller.
The CRD4299-1 AMR reference design illustrates
a high quality, low cost two-layer add-in card layout. The card is sectioned into three main parts: the
AMR bus section, the CS4299 Audio Codec ‘97
section, and the Analog I/O section.
The CS4299 contains two distinct functional sections: digital and analog. The digital section includes the AC-link registers, power management
support, SYNC detection circuitry, AC-link serial
port interface logic, and the 24.576 MHz crystal
master clock. The analog section includes the analog input multiplexer (mux), stereo input mixer,
stereo output mixer, mono output mixer, stereo
ADC, stereo DAC, and analog volume controls.
For more information refer to the CS4299
Datasheet [3]. The capacitors required for the
CS4299 and their placement are discussed in the
CS4299 Datasheet [3]. Refer to the Grounding and
Layout section of the data sheet for the recommended routing of the audio section.
2.1 Digital Audio Out
2.2.1 Power Requirements
The AMR bus provides digital out in a format compatible with the consumer portion of IEC 958. An
older version of this standard is also known as
S/PDIF. Depending upon the codec, the SPDIF signal originates either from the AMR bus or the co-
The CS4299 requires both a digital +3.3 V and an
analog +5 V supply. The digital power is supplied
from the AMR bus. A voltage regulator is recommended for the analog supply. A Motorola
2. REFERENCE DESIGN FEATURES
4
DS319RD1A1
CRD4299-1 AMR
MC78L05 regulates the AMR +12 V supply down
to provide a clean +5 V analog supply for the
CS4299. The MC78L05 regulator can provide adequate current, which is enough for the CS4299 and
associated analog circuitry.
put voltage of 1 Vrms. The Line Out connection is
made via an external 1/8" jack.
2.3 Analog I/O
An external 1/8" jack is provided for a headphone
connection. This output is driven by an amplifier
for low impedance loads such as 32 Ω headphones.
The CS4299 has many analog inputs and outputs
that may or may not be used depending on the system’s application. Unused inputs should be tied to
Vrefout (pin 28) or AC coupled via a 0.1 µF capacitor to the analog ground plane. The analog section
contains the components for a headphone amplifier. The Modem Audio, CD In, Audio In, and Aux
In headers are also part of the Analog I/O section.
The header and its associated components may or
may not be necessary depending on the audio inputs implemented.
•
Maximum output level: 1 Vrms
2.4.2 Headphone Out
•
Maximum output level: 2.0 Vrms (no load);
1.5 Vrms (32 Ω load)
•
Maximum output power: 70 mW/channel
(32 Ω load)
2.4.3 Line In
The Line In 1/8" jack provides an input to the Line
In pins of the CS4299.
•
Maximum input level: 2 Vrms
2.4 Audio I/O
2.4.4 Mic In
A full feature set of the CS4299’s analog I/O and
digital out is represented on the reference design
card through internal and external connectors:
The Microphone In 1/8" jack provides an input to a
microphone pre-amplifier circuit that applies 18 dB
of gain to the signal.
•
Line Out
•
•
Headphone Out
-
Microphone Boost enabled: 12.5 mVrms
•
Line In
-
Microphone Boost disabled: 125 mVrms
•
Mic In
•
CD Audio In
•
Aux In
2.4.5 CD Audio In
•
Video In
•
Modem Audio connection
•
Optical Digital Out
The CD Audio input provides a 4-pin (0.1 inch center) right-angled connector that is compatible with
the SONY standards and ATAPI.
•
Maximum input level:
Supports 3-pin electret (power on ring) and 2pin dynamic microphones
Four external 1/8" jacks, one external TOS-LINK
jack, and four internal header connections are used
for analog and digital inputs and outputs.
•
Maximum input level: 2 Vrms
•
Pseudo differential input using the CD Common pin as the ground
2.4.1 Line Out
•
0.1 inch connector wired as:
The output of the CS4299 is capable of driving impedances greater than 10 kΩ with a maximum out-
DS319RD1A1
-
Pin 1 : Left Channel
-
Pin 2 : Common return
5
CRD4299-1 AMR
-
Pin 3 : Common return
3. SCHEMATIC DESCRIPTION
-
Pin 4 : Right Channel
Figures 11 through 17 show the schematics for the
CRD4299-1 AMR card. This section will describe
particular pages of the schematic that need to be
discussed.
2.4.6 Aux In
•
Internal 4-pin (0.1 inch center) right-angled
connector
•
Wired as:
•
-
Pin 1 : Left Channel
-
Pin 2 : Analog Ground
-
Pin 3 : Analog Ground
-
Pin 4 : Right Channel
Maximum input level: 2 Vrms
2.4.7 Video In
•
•
Internal 4-pin (0.1 inch center) right-angled
connector
-
Pin 1 : Left Channel
-
Pin 2 : Analog Ground
-
Pin 3 : Analog Ground
-
Pin 4 : Right Channel
Maximum input level: 2 Vrms
2.4.8 Modem Audio Connection
The modem audio connection can be made through
the internal 4-pin (0.1 inch center) right-angled
connector. This connector carries both a mono input and a mono output.
•
Internal 4 pin header (0.1 inch center)
-
Pin 1 : Mono Out (to modem)
-
Pin 2 : Analog Ground
-
Pin 3 : Analog Ground
-
Pin 4 : Phone In (from modem)
•
Maximum input level: 1 Vrms
•
Maximum output level: 1 Vrms
•
Minimum load impedance: 10 kΩ
6
3.1 Figure 11: Block Diagram
The block diagram is an interconnection overview
between schematic pages.
3.2 Figure 12: AMR Bus Interface
The +5 V power pin is decoupled through C1 and
supplies power for the SPDIF_OUT circuit. All
ground pins are tied to digital ground except for B2,
which is tied to analog ground.
The AC-link, which consists of ASDOUT, ARST#,
ASYNC, ASDIN, and ABITCLK, transfers digital
audio data between the audio codec and the host.
PC_BEEP_BUS routes the beep/speaker signal
from the motherboard to the audio subsystem, for
use in hearing POST codes (refer to the Intel Audio/Modem Riser Specification [2]).
The PRIMARY_DN# signal indicates the presence
or the absence of a primary codec on the motherboard. The MSTRCLK is the 24.576 MHz master
clock for the AC ‘97 link. Populate R51 when the
Codec is the primary codec. Populate R50 when the
Codec is the secondary codec.
The CS4297 does not support S/PDIF. Iin this case,
R3 should be populated so the S/PDIF signal originates from the AMR bus. For a CS4297A/99, by
populating R2 instead of R3, the S/PDIF signal
originates from the codec, bypassing the AMR bus.
3.3 Figure 13: Power Supply
The CS4299 requires both a digital +3.3 V and an
analog +5 V supply. The digital power is supplied
from the AMR bus. A separate regulator is recommended for the analog voltage supply to provide
good audio signal quality. A Motorola MC78L05
regulates the +12 V supply from the AMR bus
DS319RD1A1
CRD4299-1 AMR
down to a clean +5 V analog supply. Two packaging options are supported, where U5 is an SO8 surface mount package and U4 is a TO-92 pin-in-hole
package. The -12 V power pin is decoupled
through C73/C74, and supplies power to the headphone circuit.
3.4 Figure 14: CS4299 AC ‘97 Audio Codec
For the best audio performance, the analog voltage
regulator, an MC78L05, is located near the
CS4299. A 10 µF electrolytic capacitor should be
added next to pins 25 and 26 if the capacitor connected to the output of the power regulator is located far away from the CS4299. All filtering
capacitors of audio signals are NPO-type to ensure
minimal added distortion. Two footprints are provided for the crystal: a CA-301 pin-in-hole footprint, Y1, for miniature crystal; and a short height
HC-49S package, Y2. R47 is a termination resistor
in the serial AC-link between the CS4299 and the
AMR bus.
3.5 Figure 15: Analog Inputs
The inputs for AUX, VIDEO, CD, and LINE are
passed through voltage dividers that reduce the levels by 6 dB to allow connection of line level sources up to 2 Vrms. The 220 pF capacitors are
provided on Line_In, Mic_In, CD_In, Aux_In,
Video_In, and Internal Modem connection for
EMC suppression. These may be removed if EMC
testing determines they are not required. 1 µF ACcoupling capacitors are used on the Line_In,
Mic_In, CD_In, Aux_In, Video_In, and Internal
Modem circuit to minimize the low frequency rolloff. The internal CD audio connection utilizes a
pseudo-differential interface with CD_GND as the
DS319RD1A1
common return path for both the left and right
channels. Therefore, the input impedance of this
block is half of that of the other inputs.
The modem connection is both a mono input and
output. The output is fed from the CS4299’s
MONO_OUT pin through a divider made of
R22/23. The divider ratio is preset to 0 dB for an
output voltage of 1 Vrms. If a lower output voltage
is desired, the resistors can be replaced with appropriate values, as long as the total load on the output
is kept greater than 10 kΩ. The input is not divided
to accommodate line level sources up to 1 Vrms.
3.6 Figure 16: Audio Outputs
The line out is driven directly by the CS4299. The
headphone out amplifier, a Motorola MC1458, is
capable of driving stereo headphones with impedances greater than 32 Ω or powered speakers.
R37/38 are added for short-circuit protection. An
optical S/PDIF (IEC 958 consumer) output is also
supported.
3.7 Figure 17: Microphone Pre-amp and
Bias
A Motorola MC33078D low noise dual op-amp
provides an +18 dB gain stage for the microphone
and buffers the phantom power supply for the mic.
The phantom power is derived from the +5 V analog supply and buffered by U1A to provide a maximum of 4.2 V with no load and a minimum of
2.0 V under a 0.8 mA load on the ring. Hardware
rolloffs were implemented at 60 kHz and 15 kHz as
recommended by the PC 99 System Design Guide,
Chapter 17, Audio Components [5].
7
CRD4299-1 AMR
3.8 Component Selection
Great attention was given to the particular components on the CRD4299-1 AMR board with cost,
performance, and package selection as the most important factors. Listed are some of the guidelines
used in the selection of components:
onto these pins. All data converters are highly susceptible to noise on the crystal pins.
A separate chassis ground provides a reference
plane for all of the EMC components. The chassis
ground plane is connected to the analog ground
plane at the external jacks.
•
No components smaller than 0805 package
4.2 CS4299 Layout Notes
•
Use single package components, no resistor
packs
•
Right-angled headers for all internal connections to provide sufficient headroom for the
jacks
•
Dual footprint for XTAL. HC-49S, and small
circular CA-301 pin-in-hole package
Please refer to the CS4299 Datasheet [3] on how
the area under the chip should be partitioned and
how the bypass capacitors should be placed. Pay
close attention to the suggestions for the bypass capacitors on REFFLT, AFLT1, AFLT2, and the
power supply capacitors. The pinout of the CS4299
is designed to keep digital and analog signals from
crossing when laying out the board.
•
Dual footprint for +5 V regulator. Surface
mount and pin-in-hole package are supported.
3.9 EMC Components
5. AUDIO PERFORMANCE
EVALUATION
4. GROUNDING AND LAYOUT
In the below reference designators, the letters in parenthesis designate the full-scale value for that particular I/O.These reference designators are used in
the following tables to help clarify which full-scale
value applies to the particular measurement. Values referenced to digital numbers on the PC are listed with the (d) suffix.
4.1 Partitioned Voltage and Ground Planes
5.1 Plots
The pinout of the CS4299 allows the ground split to
completely separate digital signals on one side and
analog signals on the other. This split is located
very close to the CS4299 so analog and digital
ground return currents originating from the
CS4299 may flow through their respective ground
planes. A bridge is made across the split to maintain the proper reference potential for each ground
plane.
In the following plots, stereo measurements have
two sets of data per plot and two vertical axes.
Above each vertical axis is a label indicating a
channel that relates to that axis. The data set extends beyond the vertical axis to indicate its association with that axis. Using Figure 1 as an example,
the top set of data extends beyond the right vertical
axis, which is labeled at the top “RIGHT’, indicating that the top set of data is the right channel and
associated with the right vertical axis. Likewise,
the bottom set of data extends beyond the left vertical axis which is labeled at the top “LEFT”, indicating that the bottom set of data is the left channel
and associated with the left vertical axis.
A number of capacitors and inductors are included
to help the board meet EMC compliance tests, such
as FCC Part 15. Modifying this selection of components without EMC testing could cause EMC compliance failure.
The area around the crystal oscillator and the two
XTAL signals is filled with copper on the top and
bottom sides and attached to digital ground. This
ground plane serves to keep noise from coupling
8
DS319RD1A1
CRD4299-1 AMR
Signal Name
Connector
Maximum Voltage
Reference
Designator
Line In (A-D-PC-D-A)
Jack
2.376 VRMS
0 dB FS (li)
Line In (A-A)
Jack
2.142 VRMS
0 dB FS (li)
Mic In
Jack
0.128 VRMS
0 dB FS (mi)
Line Out
Jack
1.021 VRMS
0 dB FS (lo)
Imp.
(kΩ)
N/A
Table 1. Reference Designators
Microphones Supported
Support
3-Pin Phantom Power (power on ring)
Yes
2-Pin Dynamic
Yes
Comments
2-Pin Phantom Power (power on tip)
Table 2. Microphone Support Specifications
Full Duplex (A-D-PC-D-A):
Line In to Line Out
Reference
Dynamic Range
Left
Right
Units
Figures
-91.4
-91.4
dB FS A (lo)
99 - 1NXL
THD+N
-3 dB FS (li)
-85.2
-85.2
dB FS (lo)
99 - 1DXL
Frequency Response
Ac = -0.4 dB
20-20k
20-20k
Hz
99 - 1MXL
NOTE: TM004: combined test used in lieu of TM002 and TM003
Table 3. Full Duplex Specifications
Analog Mixer (A-A):
Line In to Line Out
Reference
Left
Right
Units
Figures
-95.8
-95.7
dB FS A (lo)
99 - 1NAL
-3 dB FS (li)
-92.9
-92.9
dB FS (lo)
99 - 1DAL
Ac = +-0.2 dB
20-20k
20-20k
Hz
99 - 1MAL
f = 10 kHz
-66.8
-66.5
dB FS (lo)
99 - 1CAL
Dynamic Range
THD+N
Frequency Response
Crosstalk
Table 4. Analog Mixer, Line In to Line Out Specifications
Analog Mixer (A-A):
Mic In to Line Out
Dynamic Range
THD+N
Frequency Response
Reference
Left
Right
Units
Figures
Gain = 0 dB
-94.1
N/A
dB FS A (lo)
99 - 1NAM
-3 dB FS (mi)
-91.3
N/A
dB FS (lo)
99 - 1DAM
Ac = -3 dB
50-15k
N/A
Hz
99 - 1MAM
NOTE: Mic In is Mono
Table 5. Analog Mixer, Mic In to Line Out Specifications
DS319RD1A1
9
CRD4299-1 AMR
CwGRAPH 0.65
CrystalWare(tm)
CRD429~1\99-1MXL.ADX
RIGHT
6
2
5
1
4
0
3
-1
2
-2
1
-3
0
-4
-1
-5
-2
-6
-3
-7
20
100
1k
Frequency (Hz)
10 k
Amplitude (dB)
Amplitude (dB)
LEFT
3
-4
20 k
Figure 1. Full Duplex (A-D-PC-D-A): Line In/Out Frequency Response
LEFT
-60
CRD429~1\99-1NXL.ADX
RIGHT
-50
-65
-55
-70
-60
-75
-65
-80
-70
-85
-75
-90
-80
-95
-85
-100
-90
-105
-95
-110
20
100
1k
Frequency (Hz)
10 k
Dynamic Range (dB FS A)
CrystalWare(tm)
Dynamic Range (dB FS A)
CwGRAPH 0.65
-100
20 k
Figure 2. Full Duplex (A-D-PC-D-A): Line In/Out Dynamic Range
10
DS319RD1A1
CRD4299-1 AMR
LEFT
-60
CRD429~1\99-1DXL.ADX
RIGHT
-50
-65
-55
-70
-60
-75
-65
-80
-70
-85
-75
-90
-80
-95
-85
-100
-90
-105
-95
-110
20
100
1k
Frequency (Hz)
10 k
THD+N (dB FS)
CrystalWare(tm)
THD+N (dB FS)
CwGRAPH 0.65
-100
20 k
Figure 3. Full Duplex (A-D-PC-D-A): Line In/Out THD+N vs. Frequency
CrystalWare(tm)
Amplitude (dB)
LEFT
3
CRD429~1\99-1MAL.ADX
RIGHT
6
2
5
1
4
0
3
-1
2
-2
1
-3
0
-4
-1
-5
-2
-6
-3
-7
20
100
1k
Frequency (Hz)
10 k
Amplitude (dB)
CwGRAPH 0.65
-4
20 k
Figure 4. Analog Mixer (A-A): Line In/Out Frequency Response
DS319RD1A1
11
CRD4299-1 AMR
LEFT
-60
CRD429~1\99-1NAL.ADX
RIGHT
-50
-65
-55
-70
-60
-75
-65
-80
-70
-85
-75
-90
-80
-95
-85
-100
-90
-105
-95
-110
20
100
1k
Frequency (Hz)
10 k
Dynamic Range (dB FS A)
CrystalWare(tm)
Dynamic Range (dB FS A)
CwGRAPH 0.65
-100
20 k
Figure 5. Analog Mixer (A-A): Line In/Out Dynamic Range
LEFT
-60
CRD429~1\99-1DAL.ADX
RIGHT
-50
-65
-55
-70
-60
-75
-65
-80
-70
-85
-75
-90
-80
-95
-85
-100
-90
-105
-95
-110
20
100
1k
Frequency (Hz)
10 k
THD+N (dB FS)
CrystalWare(tm)
THD+N (dB FS)
CwGRAPH 0.65
-100
20 k
Figure 6. Analog Mixer (A-A): Line In/Out THD+N vs. Frequency
12
DS319RD1A1
CRD4299-1 AMR
CwGRAPH 0.65
CrystalWare(tm)
CRD429~1\99-1MAM.ADX
3
2
1
Amplitude (dB)
0
-1
-2
-3
-4
-5
-6
-7
20
100
1k
Frequency (Hz)
10 k
20 k
Figure 7. Analog Mixer (A-A): Mic In/Line Out Frequency Response
CwGRAPH 0.65
CrystalWare(tm)
CRD429~1\99-1NAM.ADX
-60
-65
Dynamic Range (dB FS A)
-70
-75
-80
-85
-90
-95
-100
-105
-110
20
100
1k
Frequency (Hz)
10 k
20 k
Figure 8. Analog Mixer (A-A): Mic In/Line Out Dynamic Range
DS319RD1A1
13
CRD4299-1 AMR
CwGRAPH 0.65
CrystalWare(tm)
CRD429~1\99-1DAM.ADX
-60
-65
-70
THD+N (dB FS)
-75
-80
-85
-90
-95
-100
-105
-110
20
100
1k
Frequency (Hz)
10 k
20 k
Figure 9. Analog Mixer (A-A): Mic In/Line Out THD+N vs. Frequency
LEFT
-70
CRD429~1\99-1CAL.ADX
RIGHT
-60
-75
-65
-80
-70
-85
-75
-90
-80
-95
-85
-100
-90
-105
-95
-110
-100
-115
-105
-120
20
100
1k
Frequency (Hz)
10 k
Crosstalk (dB)
CrystalWare(tm)
Crosstalk (dB)
CwGRAPH 0.65
-110
20 k
Figure 10. Analog Mixer (A-A): Line In/Out Crosstalk vs. Frequency
14
DS319RD1A1
CRD4299-1 AMR
6. REFERENCES
1) Intel, Audio Codec ‘97 Component Specification, Revision 2.1, http://developer.intel.com/pcsupp/platform/ac97/
2) Intel, Audio/Modem Riser Specification, Revision 1.01, Sep 10, 1998.
http://developer.intel.com/pc-supp/platform/ac97/INDEX.HTM
3) Cirrus Logic, CS4299 SoundFusion Audio Codec ‘97 Data Sheet, July 1998.
http://www.cirrus.com/products/overviews/
cs4299.html
4) Steve Harris, Clif Sanchez, Personal Computer Audio Quality Measurements, Ver 1.0
http://www.cirrus.com/products/papers/
meas/meas.html
5) Intel and Microsoft, PC 99 System Design Guide
http://www.microsoft.com/hwdev/desguid/
6) M. Montrose. Printed Circuit Board Design Techniques for EMC Compliance, IEEE Press, New York:
1996.
DS319RD1A1
15
LINE_IN_L
AU X _ I N L
AU X _ I N R
VIDEO_L
VIDEO_R
PHONE_IN
MONO_OUT
CD_INL
CD_COM
CD_INR
LINE_IN_L
LINE_IN_R
AU X _ I N L
AU X _ I N R
VIDEO_L
VIDEO_R
PHONE_IN
MONO_OUT
PC_BEEP
CD_INL
CD_COM
CD_INR
S/PDIF_CODEC
SPDIF_CODEC
ASDOUT
ABITCLK
MSTRCLK
P R I M A RY _ D N #
ARST#
ASYNC
ABITCLK
ASDIN
ASDOUT
LINE_IN_L
LINE_IN_R
AUDIO_OUT
LINE_OUT_R
LINE_OUT_L
AU X _ I N L
AU X _ I N R
A LT _ L I N E _ O U T _ L
A LT _ L I N E _ O U T _ R
VIDEO_L
VIDEO_R
PHONE_IN
MONO_OUT
SPDIF_OUT
S/PDIF_CODEC
CD_INL
CD_COM
CD_INR
PC_BEEP
MSTRCLK
P R I M A RY _ D N #
ARST#
ASYNC
ABITCLK
ASDIN
ASDOUT
PC_BEEP
CS4299
S/PDIF_OUT
LINE_OUT_R
LINE_OUT_L
A LT _ L I N E _ O U T _ L
A LT _ L I N E _ O U T _ R
LINE_OUT_R
LINE_OUT_L
A LT _ L I N E _ O U T _ L
A LT _ L I N E _ O U T _ R
MIC1
P C - B E E P - BU S
AUDIO_IN
MSTRCL
PC_BEEP_BUS
ARST#
PC_BEEP_BUS
7. SCHEMATIC, LAYOUT, AND BRACKET DRAWINGS
16
AMR_BUS
MIC1
DS319RD1A1
AUDIO_MICIN
Figure 11. Block Diagram
CRD4299-1 AMR
POWE R
DS319RD1A1
+3.3VD
+5VD
AGND
B1
AU D I O _ M U T E #
B2
GND
B3
AU D I O _ P W R D N
A1
MONO_PHONE
A2
MONO_OUT/PC_BEEP
RSVD
A3
B4
RSVD
RSVD
A4
B5
RSVD
RSVD
A5
B6
P R I M A RY _ D N #
GND
A6
-12VD
P R I M A RY _ D N #
+3.3VD
+5VD
+12VD
-12V
+5Vdual/+5VSB
B8
GND
USB_OC#
A8
B9
+12V
GND
A9
B10
GND
USB+
A10
USB-
A11
ASDOUT
ARST#
KEY
KEY
KEY
GND
A12
RSVD
S/PDIF_IN
A13
B14
RSVD
GND
A14
B15
+3.3VD
+3.3Vdual/+3.3VSB
A15
B16
GND
GND
A16
B17
AC 9 7 _ S DATA _ O U T
AC 9 7 _ S Y N C
A17
B18
AC 9 7 _ R E S E T #
GND
A18
B19
AC 9 7 _ S DATA _ I N 3
AC 9 7 _ S DATA _ I N 1
A19
B20
GND
GND
A20
B21
AC 9 7 _ S DATA _ I N 2
AC 9 7 _ S DATA _ I N 0
A21
GND
A22
AC 9 7 _ B I T C L K
A23
AC 9 7 _ M S T R C L K
R3
0
S/PDIF_OUT
populate R3 for
CS429 7 board
ASYNC
R50
47
R51
47
ABITCLK
A M R C O N N E C TO R
DGND
0
S/PDIF_CODEC
B13
GND
CGND
populate R2 for
C S 4 2 99 board
GND
B23
TO O L H O L E
M2
M3
R2
B12
B22
HOLE
M1
DGND
Figure 12. AMR Bus
populate R51 if
primar y codec.
ASDIN
populate R50 if
s e c o n d a ry codec.
17
CRD4299-1 AMR
MSTRCLK
KEY
DGND
HOLE
A7
+5VD
+ C1
10uF
ELEC
DGND
B7
B11
+ C3
10uF
ELEC
C2
0.1uF
Z5U
1
PC_BEEP_BUS
AMR BUS
1
P1
18
POWER SUPPLIES
MC78L05ACD
Do not populate U5
U5
5
NC2
6
7
AGND
8
NC1
4
GND3
GND2
3
GND4
GND1
2
VIN
VO U T
1
S U R FAC E M O U N T
P O P U L AT I O N
OPTION
-12VA
-12VD
L1
AGND
3 1 @ 1 0 0 M Hz
+12VA
+5VA
L2
OUT
IN
3 1 @ 1 0 0 M Hz
+ C70
100uF
ELEC
C71
0.1uF
Z5U
2
GND
3
PIN IN HOLE
P O P U L AT I O N
OPTION
1
+
+12VD
C73
100uF
ELEC
C74
0.1uF
Z5U
U4
MC78L05
+ C72
10uF
ELEC
AGND
AGND
DS319RD1A1
Figure 13. Power Supplies
CRD4299-1 AMR
Connect AGND to DGND with a 50 mil trace near the 4297
Connect CGND to DGND with a 50 mil trace near the finger
edge of the board.
C56
NPO
1000pF
UT_R
A LT _ L I N E _ O U T _ L
M O N O _OUT
LINE_OUT_ L
LINE_OUT_R
DS319RD1A1
C55
NPO
1000pF
C57
NPO
1000pF
+3.3VD
+3.3VD
+5VA
C58
NPO
1000pF
C59
NPO
1000pF
PC_BEEP
PHONE_IN
AU X _INL
AU X _ I N R
V I D E O _L
VIDEO_R
CD_INL
CD_COM
CD_INR
MIC1
+5VA
AGND
C51
Z5U
0.1uF
C52
Z5U
0.1uF
DGND
C64
X7R
1uF
C65
Z5U
0.1uF
C53
Z5U
0.1uF
C54
Z5U
0.1uF
LINE_IN_L
LINE_IN_R
AGND
C66
X7R
1uF
C67
Z5U
0.1uF
C68
NPO
1000pF
C69
NPO
1 0 00pF
AGND
Do not popul ate
R45
MSTRCLK
R45
0
C63
X7R
0.01uF
C62
NPO
1000pF
D o n o t p o p u late
C 6 2 a n d C 6 3 fo r
C S 4 2 97.
U3
CS4299
25
38
AV d d 1
AV d d 2
AV s s 1
AV s s 2
26
42
1
9
DV d d 1
DV d d 2
DV s s 1
DV s s 2
4
7
12
13
14
15
16
17
18
19
20
21
22
23
24
PC_BEEP
PHONE
AU X _ L
AU X _ R
VIDEO_L
VIDEO_R
CD_L
CD_GND
CD_R
MIC1
MIC2
LINE_IN_L
LINE_IN_R
28
27
29
30
32
33
34
Vrefout
R E F F LT
A F LT 1
A F LT 2
F LT 3 D
FLTI
F LTO
2
3
XTL_IN
XTL_OUT
AGND
AGND
R47
47
BIT_CLK
S DATA _ O U T
S DATA _ I N
SYNC
RESET#
6
5
8
10
11
LINE_OUT_L
LINE_OUT_R
35
36
LINE_OUT_L
LINE_OUT _R
A LT _ L I N E _ O U T _ L
A LT _ L I N E _ O U T _ R
39
41
ALT_LINE_OUT_L
A LT _ LINE_OUT_R
MONO_OUT
37
MONO_OU T
S/PDIF_OUT
EAPD
48
47
S/PDIF_CODEC
ID0#
ID1#
45
46
P R I M A RY _ D N #
BCFG
nc5
nc6
nc7
31
40
43
44
R48
ABITCLK
AS DOUT
ASDIN
ASYNC
ARST#
DGND
0
AGND
Do not popul ate
R48
layout Y1 on top of Y2 -populate only o ne XTAL
Y1
Y2
24. 576 MHz
C60
2 2 pF
NPO
DGND
C61
2 2 pF
NPO
DGND
Figure 14. CS4299
19
CRD4299-1 AMR
24. 576 MHz
20
LINE IN
R16
4
3
5
2
1
R17
J4
6.8K
C15
1uF
LINE_IN_R
CD IN
X7R
6.8K
4
R4
6.8K
GND
3
R7
6.8K
GND
2
L
1
R8
6.8K
R
J1
C4
1uF
CD_INR
X7R
C21
C22
220pF
220pF
AGND
R20
6.8K
R21
6.8K
PHONO-1/8
C25
1uF
LINE_IN_L
X7R
AGND
CGND
AGND
C8
1uF
CD_INL
X7R
4 X 1 H D R - AU
AU X IN
R9
6.8K
R12
3.4K
AGND
J3
R14
4
R
6.8K
C14
1uF
AU X _ I N R
X7R
GND
3
GND
2
R15
6.8K
R18
6.8K
C16
C17
220pF
1uF
CD_COM
X7R
R13
220pF
C13
C18
3.4K
220pF
AGND
AGND
AGND
R19
1
L
4 X 1 H D R - AU
AGND
C23
C24
220pF
220pF
6.8K
C20
1uF
AU X _ I N L
X7R
+5VA
R52
PC SPEAKER IN
AGND
Do not
p o pulate R52
VIDEO IN
4.7K
J2
R
4
R5
6.8K
GND
3
R6
6.8K
GND
2
L
1
C5
1uF
R10
6.8K
R11
6.8K
L3
VIDEO_R
3 1 @ 1 0 0 M Hz
C10
C11
220pF
220pF
47K
C26
Z5U
0.1uF
PC_BEEP
R31
C75
2700pF
X7R
4.7K
AGND
4 X 1 H D R - AU
R53
PC-BEEP-BUS
X7R
C9
1uF
VIDEO_L
X7R
AGND
AGND
AGND
AGND
INTERNAL MODEM CONNECTION
4
X7R
1uF
GND
3
GND
2
R22
0
C29
1uF
PHONE_IN
MONO_OUT
X7R
MONO OUT
1
C12
C19
220pF
220pF
4 X 1 H D R - AU
AGND
AGND
R23
R24
47K
47K
AGND
Connect CGND to AGND at the jack
AGND
DS319RD1A1
Figure 15. Audio In
CRD4299-1 AMR
C28
J5
PHONE IN
DS319RD1A1
+5VA
R25
+5VA
U1A
+
MC33078D
3
-
2
+5VA
1
C30
0.1uF
Z5U
place close to
pins 8 and 4
47K
R27
+ C31
10uF
ELEC
R26
47K
68K
AGND
AGND
AGND
R28
R29
100K
47K
AGND
+5VA
J6
R32
4
3
5
2
1
2.7K
U1B
AGND
C35
C36
R33
C33
X7R
0.068 uF
5
+
6.8K
6
-
MC33078D
PHONO-1/8
220pF
Connect CGND
to the jack
CGND
C34
1uF
MIC1
X7R
220pF
+ C37
10uF
ELEC
AGND
C38
R34
AGND
Figure 16. Audio Out
220pF
47K
21
CRD4299-1 AMR
AGND
7
22
C41
NPO
22pF
R36
56K
+
R35
27K
2
3
+
10uF
-
C40
ALT_LINE_OUT _R
4
-12VA
1
ELEC
U2A
R37
10
8
+12VA
M C 1458
AGND
C43
H E A D P H O N E JACK
1/4W
J7
4
3
5
2
1
NPO
22pF
R38
R40
10
56K
1/4W
C44
C45
-12VA
+
10uF
R39
27K
6
ALT_LINE_O UT_L
-
C42
220p F
4
220p F
7
5
AGND
CGND
Connect CGND to
AGND at the
jack
+
ELEC
P H O N O-1/8
Digital Output
SPDIF_OUT
J10
U2B
8
+12VA
5
M C 1458
AGND
4
+5VD
DGND
3
LIN E _ O U T _ R
10uF
J9
ELEC
10uF
ELEC
R43
R49
8.2K
2
1
6
LINE OUT
JAC K
4
3
5
2
1
+
C47
LIN E _ O U T _ L
C50
0.1u F
Z5U
+
C46
TOTX -173
DGND
DGND
R44
C48
C49
220p F
220p F
P H O N O-1/8
AGND
100K
CGND
Connect CGND to
AGND at the
jack
AGND
DS319RD1A1
Figure 17. Mic Pre-Amp
CRD4299-1 AMR
100K
DS319RD1A1
23
CRD4299-1 AMR
Figure 18. Assembly Drawing
24
CRD4299-1 AMR
DS319RD1A1
Figure 19. Top Layer
DS319RD1A1
25
CRD4299-1 AMR
Figure 20. Bottom Layer
26
CRD4299-1 AMR
DS319RD1A1
Figure 21. Bracket Drawing
DS319RD1A1
8. BILL OF MATERIALS
CRD4299-AMR
Item Qty
Reference
1
9
C1,C3,C31,C37,C40,C42,
C46,C47,C72
2
12
3
Value
10uF
Type
PCB Footprint
Mnfr
Part Number
Description
ELEC
CSP_ELEC_B
PANASONIC ECA-1CM100
C2,C26,C30,C50,C51,C52, 0.1uF
C53,C54,C65,C67,C71,
C74
Z5U
CSN_0805
KEMET
C0805C104M5UAC CAP, 0805, Z5U, .1uF, 20%, 50V
14
C4,C5,C8,C9,C13,C14,
C15,C20,C25,C28,C29,
C34,C64,C66
1uF
X7R
CSN_1206
VENKEL
C1206X7R500105KNE
4
18
C10,C11,C12,C16,C17,
C18,C19,C21,C22,C23,
C24,C35,C36,C38,C44,
C45,C48,C49
220pF
COG
SMT_0805
KEMET
C0805C221J5GAC CERM CAP,220pF,5%,50V,COG
5
1
C33
0.068 uF
X7R
CSN_0805
KEMET
C0805C683K5RAC CAP, 0805, X7R, 68000pF, 10%, 50V
6
4
C41,C43,C60,C61
22pF
NPO
CSN_0805
KEMET
C0805C220J5GAC CAP, 0805, C0G, 22pF, 5%, 50V
7
8
C55,C56,C57,C58,C59,
C62,C68,C69
1000pF
NPO
SMT_0805
KEMET
C0805C102J5GAC CERM CAP, 1000pF, 5%, 50V,COG
8
1
C63
0.01uF
X7R
CSN_0805
KEMET
C0805C103K5RAC CERM CAP, .01uF, 10%, 50V,X7R
9
2
C70,C73
100uF
ELEC
CSP_ELEC_E
PANASONIC ECE-V1CA101P
10
1
C75
2700pF
X7R
CSN_0805
KEMET
11
4
J1,J2,J3,J5
4X1HDR-AU
CON_MLX_70553
MOLEX
12
4
J4,J6,J7,J9
PHONO-1/8
CON_STEREO_LZR LZR ELECTRONICS
13
1
J10
TOTX-173
14
3
L1,L2,L3
[email protected]
15
2
M1,M2
HOLE
16
1
M3
TOOLHOLE
TOOLHOLE
17
1
P1
AMR CONNECTOR
AMR5V-46
FERRITE
ALUM ELEC, 10uF, 20%, 16V,POL
CAP, 1206, X7R, 1uF, 10%, 25V
CAP, SMT E, ELEC, 100uF, 20%, 16V
C0805C272K5RAC CAP, 0805, X7R, 2700pF, 10%, 50V
70553-0003
HDR, 4X1, 0.025" PIN, 0.1" CTR, 15u" AU
SJ372
CONN, 1/8" DOUBLE SW. STEREO PHONE
JACK
OPTICAL TOSLINK TRANSMITTER
TOTX173
TOSHIBA
TOTX173
IND_FB1206
TDK
HF50ACB321611-T IND, FBEAD, 1206, [email protected], 25%
2
R2,R22
0
RES
RES_0805
PHILIPS
9C08052A0R00J
RES, SO, 0805, 0, 5%, 1/10W, METAL FILM
19
17
R4,R5,R6,R7,R8,R9,R10,
R11,R14,R15,R16,R17,
R18,R19,R20,R21,R33
6.8K
RES
RES_0805
PHILIPS
9C08052A6801F
RES, SO, 0805, 6.8K, 1%, 1/10W, METAL
FILM
20
2
R12,R13
3.4K
RES
RES_0805
PHILIPS
9C08052A3401F
RES, SO, 0805, 3.4K, 1%, 1/10W, METAL
FILM
21
7
R23,R24,R25,R27,R29,
R34,R53
47K
RES
RES_0805
PHILIPS
9C08052A4702J
RES, SO, 0805, 47K, 5%, 1/10W, METAL FILM
22
1
R26
68K
RES
RES_0805
PHILIPS
9C08052A6802J
RES, SO, 0805, 68K, 5%, 1/10W, METAL FILM
27
CRD4299-1 AMR
18
28
Mnfr
Part Number
23
Item Qty
3
R28,R43,R44
Reference
100K
Value
RES
Type
RES_0805
PCB Footprint
PHILIPS
9C08052A1003J
RES, SO, 0805, 100K, 5%, 1/10W, METAL
FILM
Description
24
1
R31
4.7K
RES
RES_0805
PHILIPS
9C08052A4701J
RES, SO, 0805, 4.7K, 5%, 1/10W, METAL
FILM
25
1
R32
2.7K
RES
RES_0805
PHILIPS
9C08052A2701J
RES, SO, 0805, 2.7K, 5%, 1/10W, METAL
FILM
26
2
R35,R39
27K
RES
RES_0805
PHILIPS
9C08052A2702J
RES,27K,SO,0805,5%,1/10W,METAL FILM
27
2
R36,R40
56K
RES
RES_0805
PHILIPS
9C08052A5602J
RES,56K,SO,0805,5%,1/10W,METAL FILM
28
2
R37,R38
10
RES
RES_1206
PHILIPS
9C12063A10R0J
RES, SO, 1206, 10, 5%, 1/4W, METAL FILM
29
2
R47,R51
47
RES
RES_0805
PHILIPS
9C08052A47R0J
RES, SO, 0805, 47, 5%, 1/10W, METAL FILM
30
1
R49
8.2K
RES
RES_1206
Philips
9C12063A820J
31
1
U1
MC33078D
DUAL OP AMP
SO8
MOTOROLA MC33078D
IC, SO, SOIC8, 33078, DUAL OP AMP
32
1
U2
MC1458
DUAL HP OP
AMP
SO8
MOTOROLA MC1458
DUAL HEADPHONE AMP
33
1
U3
CS4299
IC
QFP48_7X7
CRYSTAL
CS4299-KQ
SEMICOND.
IC, TQFP, AC ’97 2.1 SERIAL CODEC W/ SRC
34
1
U4
MC78L05
V REG
TO-92
MOTOROLA MC78L05AC
5V POS.VOLT.REG., 100ma
35
1
Y1
24.576 MHz
PAR RES, FUND XTL_HC49S
FOX
FS24.576
XTAL, 24.576MHz, HC49S, Fund Mode, Par
Res
RES,8.2k,SM1206,5%,1/4W
Do Not Populate
1
1
R50
47
RES
RES_0805
PHILIPS
9C08052A47R0J
RES, SO, 0805, 47, 5%, 1/10W, METAL FILM
2
1
R52
4.7K
RES
RES_0805
PHILIPS
9C08052A4701J
RES, SO, 0805, 4.7K, 5%, 1/10W, METAL
FILM
3
2
R45,R48,R3
0
RES
RES_0805
PHILIPS
9C08052A0R00J
RES, SO, 0805, 0, 5%, 1/10W, METAL FILM
5
1
Y2
24.576 MHz
PAR RES, FUND XTL_CA301
EPSON
CA-301_24.576M-C XTAL, 24.576MHz, CA-301, Fund Mode, Par
Res
6
1
U5
MC78L05ACD V REG
SO8
MOTOROLA MC78L05ACD
5V POS. VOLT. REG., 100ma
CRD4299-1 AMR
DS319RD1A1
• Notes •