AK2546 Datasheet, PDF (10/27 Pages) Asahi Kasei Microsystems – 7 channel T1 Transceiver

ASAHI KASEI
[AK2546]
RECEIVER
Receiver characteristics are guaranteed on the conditions as shown below.
VDD=3.3V±5%, VSS, GND=0V, Ta=-40~85°C,
MCLK frequency: 1.544MHz±100ppm, 24.704MHz±100ppm,
Bipolar input frequency: 1.544MHz±130ppm(reference input level: 3V0p±20%)
Parameter
Symbol Min Typ Max Units
Condition
Sensitivity
-6
dB Note1
Loss of Signal Threshold
0.35 0.5 0.7
V Note2
Allowable Consecutive Zero before LOS
170 175 180 bits
S/X tolerance
12 dB Note3
Generated Jitter
30
nspp Note4
Low pulse density immunity
1/16
Mark
Jitter Tolerance
GR-499 Category I,II
Note1: Relative value to the reference level. Compare at 772kHz with All Mark Pattern.
Note2: Level at the chip side of transformer. Loss of signal is logical AND between an analog loss of
Signal monitors input level and a digital loss of signal check recovered data stream.
Note3: PN20 and AMI 1/8 Mark pattern input. Noise frequency is 770kHz.
Note4: PN20 pattern input.
JITTER TOLERANCE
100
10
1
0.1
0.01
1
GR-499
Category II
GR-499
Category I
10
100
1000
10000 100000
Jiiter Frequency(Hz)
C0019-E-01
10
1999/9