1
Micrel Semiconductor
TEL:
1.800.401.9572
FAX:
1.408.474.0159
HTTP://
www.micrel.com
10/100
Pulse
Shaper
NRZ/NRZI
MLT3 Encoder
Parallel/Serial
Manchester Encoder
4B/5B Encoder
Scrambler
Parallel/Serial
Transmitter
TXP
TXM
Adaptive EQ
Base Line
Wander Correction
MLT3 Decoder
NRZI/NRZ
Clock
Recovery
4B/5B Decoder
Descrambler
Serial/Parallel
Auto
Negotiation
10BaseT
Receiver
Manchester Decoder
Serial/Parallel
PLL
LED
Driver
MII
Registers
and
Controller
Interface
RXM
RXP
X1
X2
SPD
FDX
COL
ACT
LINK
Power
Down or
Saving
PWRDWN
RXC
TXD3
TXD0
TXD1
TXD2
RXD3
TXEN
TXC
TXER
MDC
MDIO
COL
CRS
RXER
RXD0
RXD1
RXD2
RXDV
PWRSAVE
FIBIP
FIBIM
FXMODEB
KS8737 Product Brief
Revision 1.0
10/100 LV PHY FX
Operating at 3.3 Volts to meet low voltage and low
power requirement, the KS8737 is a 10/100BaseTX/FX
Physical Layer Transceiver which provides MII interface
for transmit and receive data. It contains the 100BaseTX/
FX Physical Medium Attachment (PMA), Physical
Medium Dependent (PMD), and Physical Coding Sub-
layer (PCS) functions. Moreover, the KS8737 has an on-
chip 10BaseT encoder/decoder and output filtering, which
eliminates the need for external filters and allows a single
set of line magnetics to be used to meet the
requirements for both 100BaseTX and 10BaseT.
The KS8737 can automatically configure itself for
100 or 10 Mbps and full or half duplex operation, using
the on-chip Auto-Negotiation algorithm. It's an ideal
physical layer transceiver choice for 100BaseTX
100BaseFX/10BaseT applications.
Block Diagram
Features
Single chip 100BaseTX/100BaseFX/10BaseT physical
layer solution
3.3V CMOS design, 70mA operating current
(excluding Transmit output driver current)
Fully compliant to IEEE 802.3u standard
Supports Media Independent Interface (MII) mode
Supports 10BaseT, 100BaseTX and 100Base-FX fiber
channel with Far_End_Fault Detection
Supports power down and power saving modes
Configurable through MII serial management ports or
via external control pins
Supports auto-negotiation and manual selection for
10Mbps or 100Mbps speeds
Supports auto-negotiation and manual selection for full-
and half-duplex modes
Standard CSMA/CD or full duplex operation at 10Mbps
or 100Mbps
On-chip built-in filtering for both 100BaseTX and
10BaseT
LED outputs for link, activity, full/half duplex, collision
and speed
Available in 64-pin TQFP surface mount package
(10 mm
10 mm
1.0 mm)
Micrel Semiconductor
TEL:
1.800.401.9572
FAX:
1.408.474.0159
HTTP://
www.micrel.com
2
System Level Applications
The KS8737 is ideal for 3.3V applications where power
and cost are important issues. A standard MII port is
supplied for easy MAC integration. Management can be
controlled by either strapping control pins or using the
MII management port. A single port example of the
KS8737 usage is shown below.
STOCK NO. M-1003
Contact Micrel Semiconductor
Location
Address
Telephone
Fax
Corporate HQ
1849 Fortune Drive
San Jose, CA 95131 USA
+1 (408) 944-0800
+1-408-944-0970
Eastern USA
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+1 (609) 654-0078
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Southeast USA
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Raleigh, NC 27615 USA
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Central USA
722 S. Denton Tap Suite 130
Coppell, TX 75019 USA
+1 (972) 393-2533
+1 (972) 393-2540
Western USA
2180 Fortune Drive
San Jose, CA 95131 USA
+1 (408) 944-0800
+1-408-944-0970
Northwest USA
401 NE Ravenna Blvd. Box 152
Seattle, WA 98115 USA
+1 (206) 526-7299
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Southwest USA
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Irvine, CA 92618 USA
+1 (949) 623-8343
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Korea
4F, KTB Building, 826-14, Yeoksam-dong, Kangnam-ku
Seoul 135-080 Korea
+82 (2) 3466-3000
+82 (2) 3466-2999
Taiwan
7F-6, No. 237, Sec. 2, Fu-Hsing South Road
Taipei, Taiwan, R.O.C.
+886 (2) 2705-4976
+886 (2) 2705-4977
China
12A, XingHao City Garden
Shenzhen, P.R. China
+86 (755) 2693-4601
Japan
1-16-15 Dogenzaka, Shibuyaku
Tokyo 150-0043 Japan
+81 (3) 5428-0871
+81 (3) 5428-0872
Europe
1st Floor, 3 Lockside Place, Mill Lane
Newbury, Berks RG14 5QS UK
+44 1635 524455
+44 1635 524466
Western Europe
10, avenue du Quebec, Villebon BP116
Courtaboeuf Cedex 91944 France
+33 (0) 1 6092 4189
+33 (0) 6 0868 4489
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