ML6694
PIN DESCRIPTION (Continued)
PIN
NAME
DESCRIPTION
39
(33)
CMREF
Receiver common-mode reference output. This pin provides a common-mode bias
point for the twisted-pair media line receiver. A typical value for CMREF is
(VCC–1.26)V.
40,41 (34,35)
10BTTXINN/P 10BASE-T transmit waveform inputs. The ML6694 presents a linear copy of the input
at 10BTTXINN/P to the TPOUTN/P outputs when the ML6694 functions in 10BASE-T
mode. Signals presented to these pins must be centered at V /2 with a single ended
CC
amplitude of ± 0.25V.
42
(36)
LPBK
Loopback TTL input pin. Tying this pin to ground places the part in loopback mode;
data at RSM<4:0> are serialized, MLT-3 encoded, equalized then sent to the receive
PLL for clock recovery and sent to the RSM<4:0> outputs. Floating this pin or tying it
to V places the part in its normal mode of operation.
CC
43
44
(37)
(38)
AVCC1
TXC
Analog +5V power supply.
Transmit clock TTL input. This 25MHz clock is the frequency reference for the
internal transmit PLL clock multiplier. This pin should be driven by an external
25MHz clock at TTL or CMOS levels.
4
MICRO-LINEAR [ MICRO LINEAR CORPORATION ]
