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ML4668 Datasheet(PDF) 5 Page - Micro Linear Corporation

Part No. ML4668
Description  Low Power Single Chip 10BASE-FL Transceiver
Download  14 Pages
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Maker  MICRO-LINEAR [Micro Linear Corporation]
Homepage  http://www.microlinear.com
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ML4668 Datasheet(HTML) 5 Page - Micro Linear Corporation

 
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ML4668
AC ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
MIN
TYP
MAX
UNITS
Transmit
FTXIDF
Transmit Idle Frequency
0.85
1.25
MHz
PTXDC
Transmit Idle duty Cycle
45
55
%
tTXNPW
Transmit Turn-On Pulse Width
20
ns
tTXODY
Transmit Turn-On Delay
200
ns
tTXLP
Transmit loopback Start-up Delay
500
ns
tTXFPW
Transmit Turn-Off Pulse Width
180
ns
tTXSOI
Transmit Turn-Off Start of Idle
400
2100
ns
tTXSDY
Transmit Steady State Propagation Delay
15
50
ns
tTXJ
Transmit Jitter into 31
Ω Load
±1.5
ns
Receive
FRXSFT
Receive Squelch Frequency Threshold
2.51
4.5
MHz
tRXODY
Receive Turn-On Delay
285
ns
tRXFX
Last Bit Received to Slow Decay Output
230
300
ns
tRXSDY
Receive Steady State Propagation Delay
15
50
ns
tRXJ
Receive Jitter
±1.5
ns
tAR
Differential Output Rise Time 20% to 80% (Rx
±, COL±)4
ns
tAF
Differential Output Fall Time 20% to 80% (Rx
±, COL±)4
ns
Collision
tCPSQE
Collision Present to SQE Assert
0
350
ns
tSQEXR
Time for SQE to Deactivate After Collision
0
700
ns
FCLF
Collision Frequency
8.5
11.5
MHz
PCLPDC
Collision Pulse Duty Cycle
40
50
60
%
tSQEDY
SQE Test Delay (Tx Inactive to SQE)
0.6
1.6
µs
tSQETD
SQE Test Duration
0.5
1.0
1.5
µs
Jabber and LED Timing
tJAD
Jabber Activation Delay
20
70
150
ms
tJRT
Jabber Reset Unjab Time
250
450
750
ms
tJSQE
Delay from Outputs Disabled to Collision Oscillator On
100
ns
tLED
RCV, CLSN, XMT On Time
8
16
32
ms
tLLPH
Low Light Present to
LMON High
3
5
10
µs
tLLCL
Low Light Present to
LMON Low
250
750
ms
Note 1: Limits are guaranteed by 100% testing, sampling, or correlation with worst-case test conditions.
Note 2: This dose not include the current from the AUI pull-down resistors, or LED status outputs.
Note 3: LED drivers can sink up to 20mA, but VOL will be higher.
Note 4: Does not include pre-bias current for fiber optic LED which would typically be 3mA.
Note 5: Threshold for switching from Link Fail to Link Pass (Low Light).


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