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1894K-33LFT

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P38
ICS1894-33
10BASE-T/100BASE-TX INTEGRATED PHYCEIVER WITH RMII INTERFACE PHYCEIVER
IDT®
10BASE-T/100BASE-TX INTEGRATED PHYCEIVER WITH RMII INTERFACE 28
ICS1894-33 REV A 021612
Recommended Component Values
ICS1894-33 TCSR
Parameter Minimum Typical Maximum Tolerance Units
TCSR Resistor Value – 1.91kΩ to GND
18.7kΩ to VDD
–1%Ω
LED Resistor Value 1k – Ω
Note:
1. The bias resistor network sets the 10baseT and 100baseTX output amplitude levels.
2. Amplitude is directly related to current sourced out of the TCSR pin.
3. Resistor values shown above are typical. User should check amplitudes and adjust for transformer effects.
4. The 18.7K resistor provides negative feedback to compensate for VDD changes. Reducing the value of
this resistor will lower the 100baseT amplitude. Reducing the value of the resistor to ground on the other
hand will increase the output signal amplitude.
ICS1894-33
78
VDD TCSR
VDD
18.7KΩ 1%
1.91KΩ 1%
ICS1894-33
10BASE-T/100BASE-TX INTEGRATED PHYCEIVER WITH RMII INTERFACE PHYCEIVER
IDT®
10BASE-T/100BASE-TX INTEGRATED PHYCEIVER WITH RMII INTERFACE 29
ICS1894-33 REV A 021612
DC Operating Characteristics for Supply Current
The table below lists the DC operating characteristics for the supply current to the ICS1894-33 under various
conditions.
Deep Power Down Current Consumption Table
Condition VDDIO (V) VDD and VDDD (V) Current (mA) (typical)
Autonegotiation 3.3 3.3 68
1.8 3.3 66
100BaseTX FD and Linked 3.3 3.3 102
10BaseTX FD and Linked 3.3 3.3 97
Power Down (Reg0:11 = 1) 3.3 3.3 16
Case 1 Case 2 Case 3 Case 4 Case 5
Register 24:8 DPD Enable √ √ √ √ √
Register 24:7 TPLL_100 DPD Enable √ √ √ √
Register 24:6 RX_100 DPD Enable √ √ √
Register 24:5 Admix_TX DPD Enable √ √
Register 24:4 CDR100_cdr DPD Enable √
Current (mA) (typical) 68 39 26 24 16
ICS1894-33
10BASE-T/100BASE-TX INTEGRATED PHYCEIVER WITH RMII INTERFACE PHYCEIVER
IDT®
10BASE-T/100BASE-TX INTEGRATED PHYCEIVER WITH RMII INTERFACE 30
ICS1894-33 REV A 021612
DC Operating Characteristics for Inputs and Outputs
Unless otherwise specified, the table below lists the 3.3V/1.8 V DC operating characteristics of the ICS1894-33
inputs and outputs.
For 3.3 V Signals
For 1.8 V Signals
Parameter Symbol Conditions Min. Max. Units
Input High Voltage V
IH
2.0 – V
Input Low Voltage V
IL
–0.8V
Output High Voltage V
OH
I
OH
= –4 mA 2.4 – V
Output Low Voltage V
OL
I
OL
= +4 mA – 0.4 V
Parameter Symbol Conditions Min. Max. Units
Input High Voltage V
IH
0.8 – V
Input Low Voltage V
IL
–0.7V
Output High Voltage V
OH
I
OH
= –4 mA 1.6 – V
Output Low Voltage V
OL
I
OL
= +4 mA – 0.1 V
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P38

1894K-33LFT

Mfr. #:
Buy 1894K-33LFT
Manufacturer:
IDT
Description:
Ethernet ICs 3.3V 10/100 PHY RMII
Lifecycle:
New from this manufacturer.
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