ML2722
PIN
SIGNAL
NAME
I/O
FUNCTION
DIAGRAM
MODE CONTROL AND INTERFACE LINES
VDD
1
2
3
XCEN
RXON
PAON
I (CMOS)
I (CMOS)
O (CMOS)
Enables the bandgap reference and
voltage regulators when high. With
XCEN low the device consumes only
leakage current in STANDBY mode
when low. XCEN low also preserves
register contents and allows register
writes. This is a CMOS input, and the
thresholds are referenced to VDD and
VSS.
31
XCEN
1
2
RXON
DIN
30
8
VSS
VDD
31
Switches the transceiver between
TRANSMIT and RECEIVE modes.
Circuits are powered up and signal paths
reconfigured according to the operating
mode. This is a CMOS input, and the
thresholds are referenced to VDD and
VSS.
XCEN
1
2
RXON
DIN
30
8
VSS
Enables the off-chip PA at the correct
times in a Transmit slot. Goes high when
transmit RF is present at TRFO; goes low
5µs before transmit RF is removed from
TRFO. Has interlock logic to shut down
the PA if the PLL does not lock.
VDD
31
3
PAON
VSS
8
DS2722-F-05
FINAL DATASHEET
DECEMBER 2003
10
MICRO-LINEAR [ MICRO LINEAR CORPORATION ]
