15 / 93 page
IP178C/IP178C LF/IP178CH/IP178CH LF
Datasheet
15/93
June 21, 2007
Copyright © 2004, IC Plus Corp.
IP178Cx-DS-R12
1
Pin description
Type
Description
I
Input pin
O
Output pin
IPL
Input pin with internal pull low 50M ohm
IPH
Input pin with internal pull high 50M ohm
Type
Description
IPL1
Input pin with internal pull low 22.8k ohm
IPH1
Input pin with internal pull high 22.8k ohm
IPL2
Input pin with internal pull low 92.6k ohm
IPH2
Input pin with internal pull high 113.8k ohm
Pin No.
Label
Type
Description
Analog
52
REG_OUT
O
Regulator output voltage
The internal regulator uses pin83/pin92 VCC_O as reference
voltage to control external transistor to generate a voltage
source between 1.80v ~ 2.05v..
If pin 53 EXTMII_EN is pulled high, then pin83/pin92 VCC_O
should be connected to 3.3v to generate 1.80v ~ 2.05v voltage
source.
If pin 53 EXTMII_EN is pulled low, then pin83/pin92 VCC_O
should be connected to 2.5v to generate 1.80v ~ 2.05v voltage
source.
17
BGRES
I
Band gap resister
It is connected to GND through a 6.19k (1%) resistor in
application circuit.
115, 116,
127, 126,
2, 3, 14,
13, 22,
23, 34,
33, 38,
39, 50,
49
RXIP0~7
RXIM0~7
I
TP receive
119, 120,
123, 122,
6, 7, 10,
9, 26, 27,
30, 29,
42, 43,
46, 45
TXOP0~7
TXOM0~7
O
TP transmit
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