AK2540 Datasheet, PDF (10/33 Pages) Asahi Kasei Microsystems – Quad T1 Transceiver

ASAHI KASEI
[AK2540]
RECEIVER
Receiver characteristics are guaranteed under the conditions shown below.
VDD=3.3V±5% or 5.0V±5%, VSS=0V, GND=0V, Ta=-40 - 85°C,
MCLK frequency: 1.544MHz±100ppm, 24.704MHz±100ppm,
AMI input data rate:1.544bps±130ppm(reference input level: 3V0p±20%)
Parameter
Symbol Min Typ Max Units
Conditions
Sensitivity
-6
dB Note 1
Loss of Signal Threshold
0.35 0.5 0.7 V0p Note 2
Jitter Tolerance
GR-499 CategoryI,II, ATT TR 62411
Consecutive Zeros before Loss of Signal
170 175 180
Note 3
Input Impedance
20
kohm Note 4
Note 1: Relative value to the reference level. Compare at 772kHz with all mark pattern.
Note 2: Level at the line side of transformer. Loss of signal is logical OR between an analog loss of
signal, which monitors input level, and a digital loss of signal, which checks recovered data
stream.
Note 3: The device will tolerate consecutive zeros until loss of signal is reported with QRSS (PN20
Modified) pattern.
Note 4: It is not subject to be tested for the production. Guaranteed by design.
JITTER TOLERANCE
1000
100
10
1
0.1
1
JITTER TOLERANCE
TR62411
10
100
1000
10000 100000
Jiiter Frequency(Hz)
MS0012-E-00
10
2000/1