SI5100 Datasheet, PDF (7/40 Pages) Silicon Laboratories – SiPHY™ OC-48/STM-16 SONET/SDH TRANSCEIVER

Si5100
Table 2. DC Characteristics (Continued)
(V_DD = 1.8 V ±5%, T_A = –20 to 85 °C)
Parameter
Symbol Test Condition
Min
Typ Max
Unit
LVDS Common Mode Output Voltage
V_CM
(RXDOUT,RXCLK1,RXCLK2,TXCLK16OUT)
1.125
1.2 1.275
V
Input Impedance (RXDIN)
R_IN
Each input to
42
50
58
Ω
common mode
LVDS and LVPECL Input Impedance
(TXDIN, TXCLK16IN, REFCLK)
R_IN
Each input to
45
55
65
Ω
common mode
CML Output Impedance
(TXDOUT, TXCLKOUT)
R_OUT Each output to
45
55
65
Ω
common mode
LVDS Output Impedance
(RXDOUT, RXCLK1, RXCLK2,
TXCLK16OUT)
R_OUT Each output to
45
55
65
Ω
common mode
Output Current Short to GND
(RXDOUT,RXCLK1,RXCLK2,
TXCLK16OUT)
I_SC(–)
—
12
40
mA
Output Current Short to V_DD
(RXDOUT, RXCLK1, RXCLK2,
TXCLK16OUT)
I_SC(+)
–8
–6
—
mA
LVTTL Input Voltage Low
LVTTL Input Voltage High
V_IL2 V_DDIO = 1.8–3.3 V
–0.3
— 0.35 V_DDIO V
V_IH2 V_DDIO = 1.8–3.3 V 0.65 V_DDIO — V_DDIO +
V
0.3
LVTTL Input Impedance
LVTTL Output Voltage Low
(I_OUT = 2 mA)
LVTTL Output Voltage High
(I_OUT = 2 mA)
RXAMPMON Output Impedance
LOS/SLICELVL/PHASEADJ
Input Impedance
R_IN
10
—
—
kΩ
V_OL2 V_DDIO = 1.8–3.3 V
—
—
0.4
V
V_OH2 V_DDIO = 1.8–3.3 V V_DDIO – 0.45 —
—
V
R_OUT
R_IN
4
6
8
kΩ
100
—
—
kΩ
Notes:
1. Voltage on either RXDIN+ or RXDIN– should not exceed 1000 mV_PP (single-ended).
2. LVDS differential voltages are for a 16-bit parallel data operation of the multiplexer/demultiplexer (MODE 16 = 1).
Rev. 1.1
7