SI5010 ETC, SI5010 Datasheet - Page 12

• Manufacturer Part Number: SI5010
• Description: OC-12/3 / STM-4/1 SONET/SDH CLOCK AND DATA RECOVERY IC
• Manufacturer: ETC

S i5 01 0
Pin Descriptions: Si5010
12
3, 8, 18, and
2, 7, 11, 14
GND Pad
Pin #
9, 10
4, 5
1
6
DIN+, DIN–
REFCLK+,
Pin Name
REFCLK–
REXT
GND
VDD
LOL
Figure 10. Si5010 Pin Configuration
I/O
Table 8. Si5010 Pin Descriptions
O
REFCLK+
REFCLK–
I
I
REXT
G ND
VDD
Signal Level
Preliminary Rev. 0.31
See Table 2
See Table 2
1
2
3
4
5
20
LVTTL
6
2.5 V
GND
19
7
Top View
GND
Pad
18
8
17
9
16
10
External Bias Resistor.
This resistor is used by onboard circuitry to estab-
lish bias currents within the device. This pin must
be connected to GND through a 10 k
tor.
Supply Voltage.
Nominally 2.5 V.
Supply Ground.
Nominally 0.0 V. The GND pad found on the bottom
of the 20-pin micro leaded package (see Figure 11)
must be connected directly to supply ground.
Differential Reference Clock.
The reference clock sets the initial operating fre-
quency used by the onboard PLL for clock and data
recovery. Additionally, the reference clock is used to
derive the clock output when no data is present.
Loss of Lock.
This output is driven high when the recovered clock
frequency deviates from the reference clock by the
amount specified in Table 4 on page 7.
Differential Data Input.
Clock and data are recovered from the differential
signal present on these pins.
15
14
13
12
11
PW RDN/CAL
VDD
DO UT+
DO UT–
VDD
Description
1
resis-