參數(shù)資料
型號: AM79C940JCW
廠商: Advanced Micro Devices, Inc.
英文描述: Media Access Controller for Ethernet (MACE)
中文描述: 媒體訪問控制器(MACE發(fā)生以太網(wǎng))
文件頁數(shù): 90/122頁
文件大?。?/td> 914K
代理商: AM79C940JCW
AMD
90
Am79C940
DC CHARACTERISTICS over COMMERCIAL operating ranges unless otherwise
specified (continued)
Parameter
Symbol
Parameter Description
Test Conditions
V
AOCM
DO
±
Common Mode
R
L
= 78
Output Voltage
V
OD
I
DO
±
Differential Output
R
L
= 78
(Note 6)
Voltage Imbalance
V
ATH
Receive Data Differential
RL = 78
(Note 6)
Input Threshold
V
ASQ
DI
±
and CI
±
Differential
Input Threshold Squelch
RL = 78
(Note 6)
V
IRDVD
DI
±
and CI
±
Differential
Mode Input Voltage Range
V
ICM
DI
±
and CI
±
Input Bias
I
IN
= 0 mA
Voltage
V
OPD
DO
±
Undershoot Voltage
(Note 5)
at Zero Differential on
Transmit Return to
Zero (ETD)
I
DD
Power Supply Current
SCLK = 25 MHz
XTAL1 = 20 MHz
I
DDSLEEP
Power Supply Current
SLEEP
Asserted, AWAKE = 0
RWAKE = 0 (Note 7)
I
DDSLEEP
Power Supply Current
SLEEP
Asserted, AWAKE = 1
RWAKE = 0 (Note 7)
I
DDSLEEP
Power Supply Current
SLEEP
Asserted, AWAKE = 0
RWAKE = 1 (Note 7)
Twisted Pair Interface
I
IRXD
Input Current at RXD
±
AV
SS
< V
IN
< AV
DD
R
RXD
RXD
±
Differential Input
(Note 8)
Resistance
V
TIVB
RXD+, RXD– Open Circuit
I
IN
= 0 mA
Input Voltage (Bias)
V
TIDV
Differential Mode Input
AV
DD
= +5 V
Voltage Range (RXD
±
)
V
TSQ+
RXD Positive Squelch
Sinusoid
Threshold (Peak)
5 MHz
f
10 MHz
V
TSQ-
RXD Negative Squelch
Sinusoid
Threshold (Peak)
5 MHz
f
10 MHz
V
THS+
RXD Post-Squelch
Sinusoid
Positive Threshold (Peak)
5 MHz
f
10 MHz
V
THS-
RXD Post-Squelch
Sinusoid
Negative Threshold (Peak)
5 MHz
f
10 MHz
V
LTSQ+
RXD Positive Squelch
LRT
= LOW
Threshold (Peak)
V
LTSQ-
RXD Negative Squelch
LRT
= LOW
Threshold (Peak)
V
LTHS+
RXD Post-Squelch Positive
LRT
= LOW
Threshold (Peak)
V
LTHS-
RXD Post-Squelch
LRT
= LOW
Negative Threshold (Peak)
Min
2.5
Max
AVDD
Unit
V
–25
25
mV
–35
35
mV
–160
–275
mV
1.5
V
AV
DD
–3.0
AV
DD
–0.8
V
–100
mV
75
mA
100
μ
A
10
mA
20
mA
–500
10
500
μ
A
K
AV
DD
– 3.0
AV
DD
– 1.5
V
–3.1
+3.1
V
300
520
mV
–520
–300
mV
150
293
mV
–293
180
–150
312
mV
mV
–312
–180
mV
90
156
mV
–156
–90
mV
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