Features: · Multirate Operation from 1 Gbps up to 4.25 Gbps
· Loss-of-Signal Detection (LOS)
· Two-Wire Digital Interface
· Digitally Selectable LOS Threshold
· Digitally Selectable Bandwidth
· Digitally Selectable Output Voltage
· Low Power Consumption
· Input Offset Cancellation
· CML Data Outputs With On-Chip, 50-W Back-Termination to VCC
· Single 3.3-V Supply
· Surface-Mount, Small-Footprint, 4-mm ´ 4-mm, 16-Terminal QFN PackageApplication· Multirate SONET/SDH Transmission Systems
· 4.25-Gbps, 2.125-Gbps, and 1.0625-Gbps Fibre-Channel Receivers
· Gigabit Ethernet ReceiversSpecifications
| VCC |
Supply voltage (2) |
0.3 V to 4 V |
| VDIN+, VDIN |
Voltage at DIN+, DIN(2) |
0.5 V to 4 V |
VLOS, VSD, VSCK, VSDA,
VCOC+, VCOC, VRTHI,
VTH, VDOUT+, VDOUT |
Voltage at LOS, SD, SCK, SDA, COC+, COC, RTHI, TH, DOUT+, DOUT(2) |
0.3 V to 4 V |
| VDIN,DIFF |
Differential voltage between DIN+ and DIN |
±1.25 V |
| ILOS |
Current into LOS |
10 mA |
IDIN+, IDIN, IDOUT+,
IDOUT |
Continuous current at inputs and outputs |
20 mA |
| ESD |
ESD rating at all terminals (HBM) |
4 kV |
| TJ,max |
Maximum junction temperature |
125°C |
| Tstg |
Storage temperature range |
65°C to 85°C |
| TA |
Characterized free-air operating temperature range |
40°C to 85°C |
| TLEAD |
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds |
260°C |
(1) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) All voltage values are with respect to network ground terminal.
DescriptionThe ONET4291PA is a versatile, high-speed, rate-selectable limiting amplifier for multiple fiber-optic applications with data rates up to 4.25 Gbps.
The device ONET4291PA provides a two-wire interface, which allows digital bandwidth selection, digital output amplitude selection, and digital loss of signal threshold adjust.
This device ONET4291PA provides a gain of about 43 dB, which ensures a fully differential output swing for input signals as low as 5 mVp-p.
The ONET4291PA provides loss-of-signal detection with either digital or analog threshold adjust. The part is available in a small-footprint, 4-mm ´ 4-mm, 16-terminal QFN package. It requires a single 3.3-V supply.
This power-efficient, rate-selectable limiting amplifier ONET4291PA is characterized for operation from 40°C to 85°C ambient temperature.
ONET4291PA Data Sheet
