MYSON

TECHNOLOGY

MTD492

MTD492 Revision 3.5 01/07/1997

6/8

OPERATING CONDITIONS

DC Supply Voltage (VEE)

8.55-9.45V

Operating Temperature

Parameter

Symbol

Min

Typ

Max

Unit

Recommended Supply Voltage

VEE

-8.55

-9.0

-9.45

V

Supply Current (all VEE pins) Non-transmission

IEEidle

-

-25

-35

mA

Transmission

IEExmt

-

-70

-80

mA

Receiver Input Bias Current (RXI)

Irxi

-2

-

+25

µA

Transmission Output DC Current (TXO)

Itdc

37

41

45

mA

Transmission Output AC Current (TXO)

Itac

+28

-

Itdc

mA

Collision Threshold (Reception Mode)

Vcd

-1.45

-1.53

-1.62

V

Carrier Sense Threshold (RXI)

Vcs

-0.38

-0.45

-0.52

V

Differential Output Voltage (RX+,CD+)

Vod

+500

-

+1500

mV

DC Common Mode Output Voltage (RX+)

Vocrx

-1.0

-2.0

-3.0

V

DC Common Mode Output Voltage (CD+) (Note 2)

Voccd

VEE

VEE

VEE

V

Idle State Differential Offset Voltage(RX+,CD+)

Vob

-

0

+40

mV

Transmission Squelch Threshold(TX+) (Note 3)

Vts

-175

-225

-300

mV

Input Capacitance (RXI)

Cx

-

1.5

-

pF

Shunt Resistance - Non-transmission

Rrxi

100

-

-

k

Ω

Shunt Resistance - Transmission

Rtxo

10

-

-

k

Ω

Notes: 1. Testing is done under the testing load defined in Figure 6.

2. During an idle condition, Voc is pulled down to VEE to minimize the power dissipation across the

load resistors connected to CD+pins.

3. Tested under continuous 5MHz waveform that represents the preamble.

Parameter

Symbol

Min

Typ

Max

Unit

Reception Start-up Delay (RXI to RX+)

Tron

-

2.5

5

bits

Reception Propagation Delay (RXI to RX+)

Trd

-

35

50

ns

Differential Output Rise Time (RX+,CD+)

Trr

-

4

7

ns

Differential Output Fall Time (RX+,CD+)

Trf

-

4

7

ns

Receiver and Cable Total Jitter

Trj

-

+2

-ns

Transmission Start-up Delay

Ttst

-

1

2

bits

Transmission Propagation Delay

Ttd

-

25

50

ns

Transmission Rise Time (10%-90%) (TXO)

Ttr

20

25

30

ns

Transmission Fall Time (10%-90%) (TXO)

Ttf

20

25

30

ns

Ttr and Trf Mismatch

Ttm

-

+0.5

+3.0

ns

Transmission Skew(TXO)

Tts

-

+0.5

+2

ns

Transmission Turn-on Pulse Width at Vts(TX+) (Note 4)

Tton

10

20

40

ns

Transmission Turn-off Delay

Ttoff

130

200

260

ns

Transmission IDL Detection Time (Note 5)

Ttidl

130

170

200

ns

Collision Turn-on Delay

Tcon

-

7

13

bits

Collision Turn-off Delay

Tcoff

-

-

20

bits