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MTD907 Datasheet Preview

MTD907 Datasheet

Ethernet Encoder/decoder and 10BaseT Transceiver

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MYSON
TECHNOLOGY
MTD907
Ethernet Encoder/decoder and 10BaseT
Transceiver with Built-in Waveform Shaper
FEATURES
• Pin-out and functionally compatible with Level One LXT907.
• Built-in UTP waveform shaping function - no external filters required.
• Integrated Manchester encoder/decoder.
• 10Base-T compliant transceiver and AUI transceiver.
• Full duplex capability.
• Automatic and manual interface selection (AUI/TP).
• Automatic TP polarity detection and correction.
• Heartbeat enable/disable function and jabber disable function.
• Drives 4 LED status indicators.
GENERAL DESCRIPTION
MTD907 is an integrated Ethernet Endec and 10Base-T transceiver with built-in UTP transmission waveform
shaping function. The integrated encoder/decoder conforms to IEEE802.3 standards and provides all needed
active circuitry with which to interface the majority of IEEE802.3-conforming controllers to either the 10Base-T
media or attachment unit interface (AUI). The functions provided by MTD907 include Manchester
encoding/decoding, jabber detection, automatic media selection, reception squelch and transmission
waveform shaping, automatic UTP polarity detection and correction for the UTP media.
BLOCK DIAGRAM
AUT
LBK PAULTE
MD0, MD1
TXC
TXC, TXE
CRS, RXC,
RXD
COL, JAB
DSQ
LEDR, LEDL,
LEDC, LEDT
JAB, PLR
MODE
CONTROL
MANCHESTER
CODER/
DECODER
COLLISION
LOGIC
LED/STATUS
LOGIC
MEDIA
SELECTION
AND
CONTROL
WAVEFORM
SHAPING
LINKTEST
POLARITY
DETECT
RLD,
RJAB,
RCMPT
REMOTE
SIGNALING
AMP
TPA, TPB
TNA, TNB
AC/DC
SQUELCH
AMP
RDP
RDN
NTH
DOP
DON
AC/DC
SQUELCH
DIP, CIP
DIN, CIN
TST
TRST
TEST LOGIC
XCAL
OSC
REFERENCE Circuit
X2 X1
This datasheet contains new product information. Myson Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product.
1/14
MTD907 Revision 4.5 01/23/1997




Myson

MTD907 Datasheet Preview

MTD907 Datasheet

Ethernet Encoder/decoder and 10BaseT Transceiver

No Preview Available !

www.DataSheet4U.com
MYSON
TECHNOLOGY
1.0 PIN CONNECTION
44-pin PLCC
RLD
LTE
JAB
TST
TXC
TXD
TXE
X1
X2
COL
AUT
6 5 4 3 2 1 44 43 42 41 40
7 39
8 38
9 37
10 36
11 MTD907 35
12 44-pin PLCC 34
13 33
14 32
15 31
16 30
1718 19 20 21 22 23 24 25 26 27 2289
RDN
RDP
DSQ
TNB
TNA
VDD2
VSS2
TP A
TP B
PLR
RJAB
MTD907
1.0 PIN DESCRIPTIONS
No Symbol
1 VDD1
34 VDD2
2 CIP
3 CIN
4 NTH
5 MD0
6 MD1
7 RLD
8 LTE
9 JAB
10 TST
11 TXC
12 TXD
13 TXE
14 X1
15 X2
16 COL
I/O Name
Description
- Positive Power +5 Volt power supplies.
Supply
I Collision Input AUI transceiver CI circuit differential input pair.
I Pair
I Normal
Active high input, selects normal TP input threshold;
Threshold
when NTH=0, the TP input threshold is reduced 4.5dB.
I Mode
Mode selection pins. Determines controller compatibility
I Selection
mode: mode 00 is for AMD, 01 for Intel, 10 for Fujitsu, 11
for NSC.
O Remote Link Active high output. Signifies when the remote port is in
Down
link down condition.
I Link Test
Active high input. Enables the link test when high; when
Enabler
low, disables the TP link test.
O Jabber
Active high output. High output indicates jabber
Indicator
condition.
I Test
Active high input internally pulled low. This pin is used in
test mode only.
O Transmit Clock 10 MHz clock output. Should be directly connected to
the controller to synchronize transmission operation.
I Transmit Data Input signal, NRZ data from the controller.
I Transmission Active high input. Enables data transmission and begins
Enabler
jabber timer; should be synchronized with TXC by the
controller.
O Crystal
Built-in crystal oscillator. A 20 MHz crystal must be
I Oscillator
connected across these 2 pins or an external clock must
be applied to X2 with X1 left open.
O Collision
Output signal; drives controller collision detection input.
Detection
MTD907 Revision 4.5 01/23/1997
2/14


Part Number MTD907
Description Ethernet Encoder/decoder and 10BaseT Transceiver
Maker Myson
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