参数资料
型号: WJLXT908LC.A4
厂商: INTEL CORP
元件分类: 网络接口
英文描述: DATACOM, ETHERNET TRANSCEIVER, PQFP64
封装: ROHS COMPLIANT, LQFP-64
文件页数: 22/46页
文件大小: 618K
代理商: WJLXT908LC.A4
Intel
LXT908 Universal 3.3 V 10BASE-T and AUI Transceiver
Datasheet
29
Document #: 249049
Revision #: 003
Rev. Date: 29-Oct-2005
Receive input impedance
ZIN
–20
k
Ω
Between TPIP/TPIN,
CIP/CIN & DIP/DIN
Differential Squelch
Threshold
Normal
Threshold
NTH = High
VDS
300
395
585
mV
5 MHz square wave
input
Reduced
Threshold
NTH = Low
VDS
180
250
345
mV
5 MHz square wave
input
Table 9.
Switching Characteristics
Parameter
Symbol
Minimum
Typical
1
Maximum
Units
Jabber Timing
Maximum transmit time
20
150
ms
Unjab time
250
750
ms
Link Integrity
Timing
Time link loss receive
50
150
ms
Link min receive
2
7
ms
Link max receive
50
150
ms
Link transmit period
8
10/20
24
ms
1. Typical values are at 25°C and are for design aid only, are not guaranteed, and are not subject to
production testing.
Table 10. RCLK/Start-of-Frame Timing
Parameter
Symbol
Minimum
Typical
1
Maximum
Units
Decoder acquisition time
AUI
tDATA
900
1100
ns
TP
tDATA
1200
1500
ns
CD turn-on delay
AUI
tCD
–25
200
ns
TP
tCD
–420
550
ns
Receive data setup from
RCLK
Mode 1
tRDS
60
70
ns
Modes 2 through 5
tRDS
30
45
ns
Receive data hold from
RCLK
Mode 1
tRDH
10
20
ns
Modes 2 through 5
tRDH
30
45
ns
RCLK shut off delay from CD assert (Mode 3
and Mode 5)
tsws
±100
ns
1. Typical values are at 25°C and are for design aid only, are not guaranteed, and are not subject to
production testing.
Table 8.
Twisted-Pair Electrical Characteristics (Continued)
Parameter
Symbol
Min
Typ
1
Max
Units
Test Conditions
1. Typical values are at 25°C and are for design aid only, are not guaranteed, and are not subject to
production testing.
2. Parameter is guaranteed by design; not subject to production testing.
3. IEEE 802.3 specifies maximum jitter additions at 1.5 ns for the AUI cable, 0.5 ns from the encoder, and 3.5
ns from the MAU.
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