AMD
P R E L I M I N A R Y
176
Am79C970A
DC CHARACTERISTICS over COMMERCIAL operating ranges unless otherwise
specified (continued)
Parameter
Symbol
Twisted Pair Interface (10BASE-T) (Continued)
V
RXDTH
RXD Switching Threshold
TXD
±
and TXP
±
Output HIGH Voltage
V
TXL
TXD
±
and TXP
±
Output LOW Voltage
V
TXI
TXD
±
and TXP
±
Differential
Output Voltage Imbalance
TXD
±
and TXP
±
Idle Output Voltage
R
TX
TXD
±
, TXP
±
Differential Driver
Output Impedance
Attachment Unit Interface (AUI)
Parameter Description
Test Conditions
Min
Max
Units
(Note 6)
–35
35
mV
V
TXH
AV
SS
= 0 V
AV
DD
–0.6
AV
DD
V
AV
DD
= 5 V
AV
SS
AV
SS
+0.6
V
–40
40
mV
V
TXOFF
40
mV
(Note 6)
80
I
IAXD
Input Current at DI+ and DI–
–1V < V
IN
< AV
DD
+ 0.5 V
–500
+500
μ
A
μ
A
mV
I
IAXC
Input Current at CI+ and CI–
–1V < V
IN
< AV
DD
+ 0.5 V
R
L
= 78
–500
+500
V
AOD
Differential Output Voltage
|(DO+)–(DO–)|
630
1200
V
AODOFF
Transmit Differential Output Idle Voltage
R
L
= 78
(Note 9)
R
L
= 78
(Note 8)
R
L
= 78
R
L
= 78
(Note 7)
–40
40
mV
I
AODOFF
Transmit Differential Output Idle Current
–1
1
mA
V
CMT
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)
2.5
AV
DD
V
V
ODI
25
mV
V
ATH
–35
35
mV
V
ASQ
–275
–160
mV
V
IRDVD
–1.5
1.5
V
V
ICM
I
IN
= 0 mA
AV
DD
–3.0 AV
DD
–1.0
V
V
OPD
(Note 9)
–100
mV
Notes:
1. I
OL1
applies to AD[31:0], C/
BE
[3:0], PAR and
REQ
.
I
OL2
applies to
DEVSEL
,
FRAME
,
INTA
,
IRDY
,
PERR
,
SERR
,
STOP
,
TRDY
,
EECS ERA[7:0], ERACLK
,
EROE
,
DXCVR/
NOUT, ERD7/TXDAT, ERD6/TXEN and TDO.
I
OL3
applies to EESK/
LED1
/SFBD,
LED2
/SRDCLK, EEDO/
LED3
/SRD, and EEDI/
LNKST
.
2. V
OH
does not apply to open-drain output pins.
3. Outputs are CMOS and will be driven to rail if the load is not resistive.
4. I
IX
applies to all input pins except XTAL1.
5. I
OZL
and I
OZH
apply to all three-state output pins and bi-directional pins.
6. Parameter not tested. Value determined by characterization.
7. Tested, but to values in excess of limits. Test accuracy not sufficient to allow screening guard bands.
8. Correlated to other tested parameters—not tested directly.
9. Test not implemented to data sheet specification.
10. The power supply current in Magic Packet mode is linear. For example, at CLK = 20 MHz the maximum Magic Packet mode
power supply current would be 67 mA.