am79c974 Advanced Micro Devices, am79c974 Datasheet - Page 92

• Manufacturer Part Number: am79c974
• Description: Pcnettm-scsi Combination Ethernet And Scsi Controller For Pci Systems
• Manufacturer: Advanced Micro Devices

DC CHARACTERISTICS (continued)
Attachment Unit Interface
92
Attachment Unit Interface (AUI)
Twisted Pair Interface (10BASE-T)
Parameter
Symbol
VTXOFF
VAODOFF
IAODOFF
VRXDTH
VIRDVD
VLTSQ+
VLTSQ-
VLTHS+
VLTHS-
VTSQ+
VTSQ-
VTHS+
VTHS-
VTIDV
VAOD
VCMT
VASQ
VOPD
RRXD
VTIVB
VATH
VTXH
VTXL
IIAXD
IIAXC
VODI
VICM
IIRXD
VTXI
AMD
RTX
Parameter Description
Input Current at DI+ and DI–
Input Current at CI+ and CI–
Differential Output Voltage |(DO+)–(DO–)| RL = 78
Transmit Differential Output Idle Voltage
Transmit Differential Output Idle Current
Transmit Output Common Mode Voltage
DO Transmit Differential Output
Voltage Imbalance
Receive Data Differential Input Threshold
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
Am79C974
Test Conditions
–1 V < VIN < AVDD+0.5V
–1 V < VIN < AVDD+0.5V
RL = 78
RL = 78
RL = 78
RL = 78
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)
(Note 9)
(Note 8)
(Note 7)
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
–500
–500
–275
–500
–520
–293
–312
–176
–1.5
–3.1
Min
630
–40
–35
300
150
180
–35
–40
VSS
2.5
–1
10
90
40
VSS+0.6
–160
+500
+500
1200
–100
–300
–180
–150
AVDD
Max
500
520
293
312
176
–90
VDD
1.5
3.1
40
25
35
35
40
40
80
1
Unit
mV
mV
mA
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
K
V
V
V
V
V
V
V
A
A
A