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PDF MAX3981 Data sheet ( Hoja de datos )
| Número de pieza | MAX3981 | |
| Descripción | XAUI Quad Cable Equalizer | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MAX3981 (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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21-2178; Rev 1; 5/03
3.125Gbps XAUI Quad Cable Equalizer
General Description
The MAX3981 quad equalizer provides compensation
for transmission medium losses for four “lanes” of digi-
tal NRZ data at a data rate of 3.125Gbps in one
package. It is tailor-made for 10Gigabit Ethernet appli-
cations that require attenuation of noise and jitter that
occur in communicating with chassis-to-chassis inter-
connect. In support of IEEE-802.3ae for the XAUI inter-
face, the MAX3981 adaptively allows XAUI lanes to
reach 10m (33ft) with inexpensive twin-axial cable for
extended backplane applications.
The equalizer has 100Ω differential CML data inputs
and outputs.
The MAX3981 is available in a 44-pin exposed-pad
QFN package. The MAX3981 consumes only 700mW at
3.3V or 175mW per channel.
Features
♦ Four Differential Digital Data “Lanes” at
3.125Gbps
♦ Span 10m (33ft) of Twin-Axial Cable
♦ Receiver Equalization Reduces Intersymbol
Interference (ISI)
♦ Low Power, 175mW per Channel
♦ Standby Mode—Power-Down State
♦ Single 3.3V Supply
♦ Signal Detect
Applications
IEEE–802.3ae XAUI Interface (3.125Gbps)
InfiniBand (2.5Gbps)
Ordering Information
PART
MAX3981UGH
TEMP
RANGE
0°C to +85°C
PIN-
PACKAGE
44 QFN
PACKAGE
CODE
G4477-1
Pin Configuration appears at end of data sheet.
LINE CARD
PMD MAC
Typical Operating Circuit
SWITCH CARD
SWITCH
Rx Tx 4
10GbE
Tx Rx
4
Rx Tx
4
4 x 3.125Gbps
3.3V
SUPPLY
4
Tx Rx
OUT
IN
MAX3981
IN MAX3981
4
OUT
3.3V
SUPPLY
4
10m (33ft)100Ω
TWIN-AX CABLE
Rx
Tx
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1 page  
3.125Gbps XAUI Quad Cable Equalizer
Pin Description
PIN
1, 5, 9, 13,
23, 27, 31, 35
4, 8, 12, 16,
26, 30, 34, 38
2
3
6
7
10
11
14
15
17–22, 39–42
24
25
28
29
32
33
36
37
43
44
EP
NAME
VCC
GND
IN1+
IN1-
IN2+
IN2-
IN3+
IN3-
IN4+
IN4-
N.C.
OUT4-
OUT4+
OUT3-
OUT3+
OUT2-
OUT2+
OUT1-
OUT1+
EN
SDET
Exposed
Pad
+3.3V Supply Voltage
FUNCTION
Supply Ground
Positive Equalizer Input Channel 1, CML
Negative Equalizer Input Channel 1, CML
Positive Equalizer Input Channel 2, CML
Negative Equalizer Input Channel 2, CML
Positive Equalizer Input Channel 3, CML
Negative Equalizer Input Channel 3, CML
Positive Equalizer Input Channel 4, CML
Negative Equalizer Input Channel 4, CML
No Connection. Leave unconnected.
Negative Equalizer Output Channel 4, CML
Positive Equalizer Output Channel 4, CML
Negative Equalizer Output Channel 3, CML
Positive Equalizer Output Channel 3, CML
Negative Equalizer Output Channel 2, CML
Positive Equalizer Output Channel 2, CML
Negative Equalizer Output Channel 1, CML
Positive Equalizer Output Channel 1, CML
Enable Equalizer Input. A TTL high selects normal operation. A TTL low selects low-power standby
mode.
Signal Detect Output for Channel 1. Produces a TTL high output when a signal is detected.
Ground. The exposed pad must be soldered to the circuit board ground plane for proper thermal and
electrical performance.
_______________________________________________________________________________________ 5
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet MAX3981.PDF ] | |
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