am79c970 Advanced Micro Devices, am79c970 Datasheet - Page 135

• Manufacturer Part Number: am79c970
• Description: Pcnettm-pci Single-chip Ethernet Controller For Pci Local Bus
• Manufacturer: Advanced Micro Devices

DC CHARACTERISTICS (continued)
1-1002
Twisted Pair Interface (10BASE–T)
Parameter
Symbol
VTXOFF
VRXDTH
VLTSQ+
VLTSQ-
VIRDVD
VLTHS+
VLTHS-
VTSQ+
VTSQ-
VTHS+
VTHS-
VASQ
VOPD
RRXD
VTIVB
VTIDV
VTXH
VICM
IIRXD
VTXL
VTXI
AMD
RTX
Parameter Description
DI and CI Differential Input Threshold
(Squelch)
DI and CI Differential Mode Input
Voltage Range
DI and CI Input Bias Voltage
DO Undershoot Voltage at ZERO
Differential on Transmit Return to
ZERO (ETD)
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 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 Idle Output Voltage
TXD , TXP Differential Driver Output
Impedance
P R E L I M I N A R Y
Am79C970
Test Conditions
IIN = 0 mA
(Note 9)
AVDD < VIN < AVDD
IIN = 0 mA
AVDD = 5.0 V
Sinusoid, 5 MHz
Sinusoid, 5 MHz
Sinusoid, 5 MHz
Sinusoid, 5 MHz
LRT = LOW
LRT = LOW
LRT = LOW
LRT = LOW
(Note 4)
VSS = 0 V
VDD = 5 V
(Note 4)
f
f
f
f
10 MHz
10 MHz
10 MHz
10 MHz
AVDD–3.0 AVDD–1.0
AVDD–3.0 AVDD–1.5
VDD–0.6
–275
–500
–520
–293
–312
–176
–1.5
–3.1
Min
300
150
180
–35
–40
VSS
10
90
40
VSS+0.6
–160
–100
–300
–150
–180
Max
500
520
293
312
176
–90
VDD
1.5
3.1
35
40
40
80
Unit
mV
mV
K
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
V
V
V
V
V
V
A