AM79C98 Advanced Micro Devices, AM79C98 Datasheet - Page 15

• Manufacturer Part Number: AM79C98
• Description: Twisted-Pair Ethernet Transceiver (TPEX)
• Manufacturer: Advanced Micro Devices

DC CHARACTERISTICS (continued)
Twisted Pair Interface
Power Supply Current
Parameter
Symbol
I
V
V
DDPRDN
V
V
V
V
I
V
R
V
I
V
RXDTH
V
IREXT
V
TXOFF
R
IRXD
TSQ+
TSQ–
THS+
THS–
I
TIVB
TIDV
RXD
TXH
DD
TXL
TXI
TX
Parameter Description
Input Current at RXD+/–
RXD+/– Differential Input
Resistance
RXD+, RXD– Open Circuit Input
Voltage (Bias)
Differential Mode Input
Voltage Range (RXD+/–)
RXD Positive
Squelch Threshold (Peak)
RXD Negative
Squelch Threshold (Peak)
RXD Post-Squelch Positive
Threshold (Peak)
RXD Post-Squelch Negative
Threshold (Peak)
RXD Switching Threshold
TXD+/– and TXP+/–
Output HIGH Voltage
TXD+/– and TXP+/–
Output LOW Voltage
TXD+/– and TXP+/–
Differential Output
Voltage Imbalance
TXD+/– and TXP+/–
Differential Idle Output Voltage
TXD+/– and TXP+/–
Differential Driver
Output Impedance
Input Current at REXT Pin
Power Supply Current
(Transmitting 10 MHz Data)
(Typical TP load)
Power Supply Current
(Transmitting 10 MHz Data)
(No TP load)
Power Supply Current
in Power Down Mode
Test Conditions
AV
(Note 1)
I
AV
Sinusoid 5 MHz < f< 10 MHz
Sinusoid 5 MHz < f< 10 MHz
Sinusoid 5 MHz < f< 10 MHz
Sinusoid 5 MHz < f< 10 MHz
(Note 1)
(Note 2)
DV
(Note 2)
DV
DV
(Note 1)
R
AV
PRDN/RST = HIGH
PRDN/RST = HIGH
PRDN/RST = LOW
IN
EXT
Am79C98
SS
= 0 mA
DD
SS
DD
DD
DD
= 24.3K
< V
= +5 V
= 0 V
= +5 V
= +5 V
= +5 V
IN
< AV
DD
1%
AV
DV
DV
–500
–520
–293
DD
DD
–3.1
Min
300
150
–60
–40
–40
10
SS
- 3.0
- 0.6
DV
AV
DV
–300
–150
DD
SS
500
520
293
+40
+40
120
115
Max
3.1
60
40
90
4
DD
+ 0.6
- 1.5
AMD
Unit
mV
mV
mV
mV
mV
mV
mV
mA
mA
mA
K
V
V
V
V
A
A
15