Optoway

BTR-7920G

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Tel: 886-3-5979798

Fax: 886-3-5979737

E-mail: sales@optoway.com.tw

http: // www.optoway.com.tw

10/1/2005

V2.0

3

Receiver Specifications (0

Parameter

Symbol

Min

Typ

Max

Units

Notes

Optical

Sensitivity

---

---

---

-22

dBm

1

Maximum Input Power

Pin

-3

---

---

dBm

Signal Detect -- Asserted

Pa

---

---

-22

dBm

Transition: low to high

Signal Detect -- Deasserted

Pd

-31

---

---

dBm

Transition: high to low

Signal detect -- Hysteresis

1.0

---

dB

Wavelength of Operation

1260

1360

nm

2

Optical Return Loss

ORL

14

dB

Electrical

Data Output Voltage – Low

-2.0

-1.58

V

3

Data Output Voltage – High

-1.1

-0.74

V

3

SD Output Voltage -- Low

-2.0

-1.58

V

SD Output Voltage -- High

-1.1

-0.74

V

BTR-7920G

SD Output Voltage -- Low

0

0.8

V

SD Output Voltage -- High

2.0

Vcc+0.3

V

BTR-7920CG

Notes: 1. Minimum sensitivity and saturation levels at BER 1E-12 for a 2

2. At least 30 dB optical isolation for the wavelength 1480 to 1580 nm.

3. These outputs are compatible with 10K, 10KH and 100K ECL and LVPECL outputs.

CONNECTION DIAGRAM

Receiver Signal Ground

1 (Rx GND)

Receiver Data Out

2 (RD+)

N/C

Receiver Data Out Bar

3 (RD

−)

Signal Detect

4 (SD)

Receiver Power Supply

5 (Rx Vcc)

TOP VIEW

Transmitter Power Supply

6 (Tx Vcc)

Transmitter Data In Bar

7 (TD

−)

Transmitter Data In

8 (TD+)

N/C

Transmitter Signal Ground

9 (Tx GND)

PIN

Symbol

Notes

1

Rx GND

Directly connect this pin to the receiver ground plane

2

RD+

See recommended circuit schematic

3

RD

−

See recommended circuit schematic

4

SD

Active high on this indicates a received optical signal

5

Rx Vcc

+3.3V dc power for the receiver section

6

Tx Vcc

+3.3V dc power for the transmitter section

7

TD

−

See recommended circuit schematic

8

TD+

See recommended circuit schematic

9

Tx GND

Directly connect this plan to the trransmitter ground plane