am79c940 Advanced Micro Devices, am79c940 Datasheet - Page 90

• Manufacturer Part Number: am79c940
• Description: Media Access Controller For Ethernet Mace
• Manufacturer: Advanced Micro Devices

DC CHARACTERISTICS over COMMERCIAL operating ranges unless otherwise
specified (continued)
90
Parameter
Twisted Pair Interface
Symbol
IDDSLEEP
IDDSLEEP
IDDSLEEP
VIRDVD
VLTSQ+
VLTSQ-
VLTHS+
VLTHS-
VAOCM
VTSQ+
VTSQ-
VTHS+
VTHS-
RRXD
VTIVB
VTIDV
VATH
VASQ
VOPD
VODI
VICM
IIRXD
IDD
AMD
DO Common Mode
Output Voltage
DO 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)
Power Supply Current
Power Supply Current
Power Supply Current
Power Supply Current
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)
Parameter Description
RL = 78
RL = 78
RL = 78
RL = 78
IIN = 0 mA
(Note 5)
SCLK = 25 MHz
XTAL1 = 20 MHz
SLEEP Asserted, AWAKE = 0
RWAKE = 0 (Note 7)
SLEEP Asserted, AWAKE = 1
RWAKE = 0 (Note 7)
SLEEP Asserted, AWAKE = 0
RWAKE = 1 (Note 7)
AVSS < VIN < AVDD
(Note 8)
IIN = 0 mA
AVDD = +5 V
Sinusoid
5 MHz
Sinusoid
5 MHz
Sinusoid
5 MHz
Sinusoid
5 MHz
LRT = LOW
LRT = LOW
LRT = LOW
LRT = LOW
Test Conditions
Am79C940
f 10 MHz
f 10 MHz
f 10 MHz
f 10 MHz
(Note 6)
(Note 6)
(Note 6)
AVDD – 3.0
AVDD–3.0
–160
–500
–520
–293
–312
–156
–3.1
Min
–25
–35
300
150
180
2.5
10
90
AVDD – 1.5
AVDD–0.8
AVDD
–275
–100
–300
–150
–180
Max
+3.1
100
500
520
293
312
156
–90
1.5
25
35
75
10
20
Unit
mV
mV
mV
mV
mA
mA
mA
K
mV
mV
mV
mV
mV
mV
mV
mV
V
V
V
V
V
A
A