78Q2123/78Q2133
MicroPHY™
10/100BASE-TX Transceiver
MDI (MEDIA DEPENDENT INTERFACE)
SIGNAL
TXOP,
TXON
RXIP,
RXIN
PIN
30,31
28,27
TYPE DESCRIPTION
A
A
TRANSMIT OUTPUT POSITIVE/NEGATIVE: Transmitter differential outputs for
both 10base-T and 100base-TX.
RECEIVE INPUT POSITIVE/NEGATIVE: Receiver differential inputs for both
10BASE-T and 100BASE-TX.
OSCILLATOR/CLOCK
SIGNAL
XTLP
XTLN
PIN
24
25
TYPE DESCRIPTION
A
A
CRYSTAL INPUT: Should be connected to a 25 MHz crystal. If an externally
generated TTL compatibility clock signal is used, that signal is applied here.
CRYSTAL OUTPUT: Should be connected to a 25 MHz crystal. When an external
clock source is being used, this pin must be grounded.
POWER SUPPLY AND GROUND
SIGNAL
PWR
GND
PIN
9, 26
10, 29
TYPE DESCRIPTION
S
G
+3.3VDC SUPPLY
GROUND
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©
2009 Teridian Semiconductor Corporation
Rev 1.5
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
