ZL30101 Data Sheet
10
Zarlink Semiconductor Inc.
43 C8/C32o Clock 8.192 MHz or 32.768 MHz (Output). This output is used for ST-BUS and GCI
operation at 8.192 Mbps or for operation with a 32.768 MHz clock. The output frequency
is selected via the OUT_SEL pin.
44 AV
DD
Positive Analog Supply Voltage. +3.3 V
DC
nominal.
45 AV
DD
Positive Analog Supply Voltage. +3.3 V
DC
nominal.
46 C2o Clock 2.048 MHz (Output). This output is used for standard E1 interface timing and for
ST-BUS operation at 2.048 Mbps.
This clock output pad includes a Schmitt input which serves as a PLL feedback path;
proper transmission-line termination should be applied to maintain reflections below
Schmitt trigger levels.
47 C16o
Clock 16.384 MHz (Output). This output is used for ST-BUS operation with a
16.384 MHz clock.
This clock output pad includes a Schmitt input which serves as a PLL feedback path;
proper transmission-line termination should be applied to maintain reflections below
Schmitt trigger levels.
48 F8/F32o Frame Pulse (Output). This is an 8 kHz 122 ns active high framing pulse (OUT_SEL=0)
or it is an 8 kHz 31 ns active high framing pulse (OUT_SEL=1), which marks the
beginning of a frame.
This clock output pad includes a Schmitt input which serves as a PLL feedback path;
proper transmission-line termination should be applied to maintain reflections below
Schmitt trigger levels.
49 F4
/F65o Frame Pulse ST-BUS 2.048 Mbps or ST-BUS at 65.536 MHz clock (Output). This
output is an 8 kHz 244 ns active low framing pulse (OUT_SEL=0), which marks the
beginning of an ST-BUS frame. This is typically used for ST-BUS operation at
2.048 Mbps and 4.096 Mbps. Or this output is an 8 kHz 15 ns active low framing pulse
(OUT_SEL=1), typically used for ST-BUS operation with a clock rate of 65.536 MHz.
50 F16o
Frame Pulse ST-BUS 8.192 Mbps (Output). This is an 8 kHz 61 ns active low framing
pulse, which marks the beginning of an ST-BUS frame. This is typically used for ST-BUS
operation at 8.192 Mbps.
51 AGND Analog Ground. 0 V
52 IC Internal Connection. Connect this pin to ground.
53 REF_SEL Reference Select (Input). This input selects the input reference that is used for
synchronization, see Table 4 on page 20. This pin is internally pulled down to GND.
54 NC No internal bonding Connection. Leave unconnected.
55 REF0 Reference (Input). This is one of two (REF0, REF1) input reference sources used for
synchronization. One of five possible frequencies may be used: 8 kHz, 1.544 MHz,
2.048 MHz, 8.192 MHz or 16.384 MHz. This pin is internally pulled down to GND.
56 NC No internal bonding Connection. Leave unconnected.
57 REF1 Reference (Input). See REF0 pin description.
58 NC No internal bonding Connection. Leave unconnected.
Pin Description (continued)
Pin # Name Description