78Q2120 Teridian Semiconductor Corp. (TDK Semiconductor), 78Q2120 Datasheet - Page 9

• Manufacturer Part Number: 78Q2120
• Description: 10/100 Ethernet PHYS
• Manufacturer: Teridian Semiconductor Corp. (TDK Semiconductor)

10/100BASE-TX
Ethernet Transceiver
OSCILLATOR/CLOCK
MISCELLANEOUS PIN
POWER SUPPLY
REFERENCE PIN
NAME
NAME
NAME
NAME
INTR
V
GND
RIBB
RIBB_RET
CKIN
XTLP,
XTLN
CC
41, 43,
42, 53,
57, 63
55, 60
8, 11,
9, 10,
3, 5,
PIN
PIN
PIN
PIN
59,
58
35
4
56
54
TYPE
TYPE
TYPE
TYPE
OZ
A
S
S
I
A
A
CLOCK INPUT: Connects to a 25 MHz clock source. This pin should be held
low when XTLP and XTLN are being used as the 25 MHz clock source.
CRYSTAL PINS: Should be connected to a 25 MHz crystal. When CKIN is
being used as the 25 MHz clock source, these pins should be connected
together.
INTERRUPT PIN: This pin is used to signal an interrupt to the media access
controller. The pin is held in the high impedance state when an interrupt is
not indicated. The pin will be forced high or low to signal an interrupt
depending upon the value of the INTR_LEVEL bit (MR16.14). The events
which trigger an interrupt can be programmed via the Interrupt Control
Register located at address MR17.
DESCRIPTION
SUPPLY VOLTAGE: 3.3V
GROUND
DESCRIPTION
BIAS CURRENT SETTING RESISTOR: To be tied to an external
resistor which is also connected to RIBB_RET pin. This resistor should be
placed as close as possible to the package pins. Suggested value is 9.76K
1%.
BIAS CURRENT SETTING RESISTOR RETURN PIN: To be connected to
external RIBB resistor.
DESCRIPTION
DESCRIPTION
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