78Q2123/78Q2133 MicroPHY™
10/100BASE-TX Transceiver
MDI (MEDIA DEPENDENT INTERFACE)
SIGNAL
PIN
TYPE DESCRIPTION
TXOP,
TXON
30,31
A
TRANSMIT OUTPUT POSITIVE/NEGATIVE: Transmitter differential outputs for
both 10base-T and 100base-TX.
RXIP,
RXIN
28,27
A
RECEIVE INPUT POSITIVE/NEGATIVE: Receiver differential inputs for both
10BASE-T and 100BASE-TX.
OSCILLATOR/CLOCK
SIGNAL
PIN
TYPE DESCRIPTION
XTLP
24
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.
XTLN
25
A
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
PIN
TYPE DESCRIPTION
PWR
GND
9, 26
S
+3.3VDC SUPPLY
GROUND
10, 29
G
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© 2009 Teridian Semiconductor Corporation
Rev 1.5
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
