14
HFBR-5208xxxZ Family, 1300 nm LED
Receiver Optical Characteristics
(T
A
= 0°C to +70°C, V
CC
= 4.75 to 5.25 V. Typical @+25°C, 5 V)
(T
A
= -40°C to +85°C, V
CC
= 4.75 to 5.25 V. Typical @+25°C, 5 V for A speci cation part)
Parameter Symbol Minimum Typical Maximum Unit Notes
Minimum Input Optical Power at window edge P
IN
MIN
(W)
-29.0 -26 dBm avg. 10
Fig 2
Minimum Input Optical Power at eye center P
IN
MIN (C) -30.5 dBm avg. 10
Fig 2,3
Input Optical Power Maximum P
IN
MAX -14 -11 dBm avg. 10
Input Operating Wavelength l 1270 1380 nm
Systematic Jitter Contributed by the Receiver SJ 0.1 0.30 ns p-p
Random Jitter Contributed by the Receiver RJ 0.25 0.48 ns p-p
Signal Detect - Asserted P
A
P
D
+1.0 dB -30.5 -28 dBm avg.
Signal Detect - Deasserted P
D
-45 -33.7 dBm avg.
Signal Detect - Hysteresis P
A
- P
D
1.0 3.2 5 dB
Notes:
10. This speci cation is intended to indicate the performance of the receiver section of the transceiver when the input power ranges from the
minimum level (with a window time-width) to the maximum level. Over this range the receiver is guaranteed to provide output data with a
Bit Error Ratio (BER) better than or equal to 1 x 10
-10
• At the Beginning of Life (BOL)
• Over the speci ed operating temperature and voltage ranges
• Input is at 622.08 Mbd, 2
23
-1 PRBS data pattern with 72 “1”s and 72 “0”s inserted per the CCITT (now ITU-T) recommendation G.958 Appendix
1.
• Receiver worst-case output data eye-opening (window time-width) is measured by applying worst-case input system-
atic (SJ) and randomjitter (RJ). The worst-case maximum input SJ = 0.5 ns peak-to-peak and the RJ = 0.15 ns peak-to-
peak per ANSI T1.646a standard. Since the input (transmitter) random jitter contribution is very small and difficult to
produce exactly, only the maximum systematic jitter is produced and used for testing the receiver. The corresponding re-
ceiver test window time-width must meet the requirement of 0.31 ns or larger. This worst-case test window time-width
results from the following jitter equation: Minimum Test Window Time-Width = Baud Interval - Tx SJ max. - Rx SJ max. - Rx RJ max.
espectively, Minimum Test Window Time-Width = 1.608 ns - 0.50 ns - 0.30 ns - 0.48 ns = 0.328 ns.
This is a test method that is within practical test error of the worst-case 0.31 ns limit.
• Input optical rise and fall times (10% - 90%) are 0.7 ns and 0.9 ns respectively.
• Transmitter operating with a 622.08 MBd, 311.04 MHz square wave input signal to simulate any cross talk present between the transmitter and
receiver sections of the transceiver.
