ICS1892 Datasheet, PDF (122/148 Pages) Integrated Circuit Systems – 10Base-T/100Base-TX Integrated PHYceiver

ICS1892 Data Sheet
Chapter 10 DC and AC Operating Conditions
10.4 DC Operating Characteristics
This section lists the DC operating characteristics for the ICS1892.
10.4.1 DC Operating Characteristics for Supply Current
Table 10-4 lists the DC operating characteristics for the supply current to the ICS1892.
Note: All V_DD measurements are taken with respect to V_SS (which equals 0 V).
Table 10-4. DC Operating Characteristics for Supply Current
Parameter
Symbol
Conditions
Min. Typ.
Supply Current†
Supply Current†
Supply Current†
Supply Current†
Supply Current†
I_DD 100Base-TX Mode
V_DD = 5.25 V
–
162
I_DD 10Base-T Mode
V_DD = 5.25 V
–
133
I_DD Auto-Negotiation Mode V_DD = 5.25 V
–
162
I_DD Power-Down Mode
V_DD = 5.25 V
–
18
I_DD Reset
V_DD = 5.25 V
–
39
Max.
180
147
180
20
43
Units
mA
mA
mA
mA
mA
† These supply current parameters are measured through V_DD pins to the ICS1892. The supply current
parameters exclude external transformer currents.
10.4.2 DC Operating Characteristics for TTL Inputs and Outputs
Table 10-5 lists the DC operating characteristics of the ICS1892 TTL inputs and outputs.
Note: All V_DD measurements are taken with respect to V_SS (which equals 0 V).
Table 10-5. DC Operating Characteristics for TTL Inputs and Outputs
Parameter
Symbol
Conditions
Min. Max. Units
TTL Input High Voltage
V_IH
V_DD = 5.25 V
–
2.0 –
V
TTL Input Low Voltage
V_IL
V_DD = 5.25 V
–
– 0.8 V
TTL Output High Voltage
V_OH
V_DD = 4.75 V I_OH = –4 mA 2.4
–
V
TTL Output Low Voltage
V_OL
V_DD = 4.75 V I_OL = +4 mA
–
0.4
V
TTL Driving CMOS,
Output High Voltage
V_OH
V_DD = 4.75 V I_OH = –4 mA 3.68 –
V
TTL Driving CMOS,
Output Low Voltage
V_OL
V_DD = 4.75 V I_OL = +4 mA
–
0.4
V
10.4.3 DC Operating Characteristics for REF_IN
Table 10-6 lists the DC characteristics for the REF_IN pin.
Note: The REF_IN input switch point is 50% of V_DD.
Table 10-6. DC Operating Characteristics for REF_IN
Parameter
Symbol
Test Conditions
Input High Voltage
Input Low Voltage
V_IH
V_DD = 5.25 V V_SS = 0 V
V_IL
V_DD = 5.25 V V_SS = 0 V
Min.
3.5
–
Max.
–
1.5
Units
V
V
ICS1892, Rev. D, 2/26/01
© 2000-2001, Integrated Circuit Systems, Inc.
All rights reserved.
122
February 26, 2001