TXC-02050C Datasheet, PDF (23/36 Pages) List of Unclassifed Manufacturers – MRT Device 6-,8-,34-Mbit Line Interface TXC-0250C

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DATA SHEET
MRT
TXC-02050C
Transmit
Data
Output
1:1
R1
R2
74ACT11244
or equivalent
34 _TXC-02050C
MRT
33
Device
For 8448 kbit/s operation: R1 and R2 = 27Ω
For 6312 kbit/s operation: R1 and R2 = 36Ω
Figure 15. Line Side Output Circuit Outline (8448 and 6312 kbit/s)
JITTER AND INTERFERING TONE TOLERANCES
The jitter measurements described in this subsection are performed using an ANRITSU model ME502B Digital
Transmission Analyzer, or equivalent.
Jitter Tolerance
ITU-T Recommendations G.823 and JT-G703 specify that network equipment must be able to accommodate
and tolerate levels of jitter up to certain specified limits. The MRT accommodates and tolerates more input jitter
than the level of input jitter specified by these Recommendations.
With input jitter applied to the MRT line side receive input DI1 (pin 29), the MRT properly recovers clock,
decodes the signal, and outputs error-free NRZ data over (and beyond) the ITU-T ranges specified for jitter
input and frequency. Performance characteristics are shown below in Figure 16 (34368 kbit/s operation),
Figure 17 (8448 kbit/s operation) and Figure 18 (6312 kbit/s operation).
LOG SCALE
10.0
Measured
Minimum Requirement
1.5
1.0
30
kHz
Acceptance
Range
0.1
10Hz
100Hz
ITU-T Rec. G.823 Limit
0.15
1kHz 10kHz
Frequency
100kHz
LOG SCALE
1MHz
Notes: Unit Interval (UI) = 1/(System Clock Frequency) = 29.10 ns
Test conditions: V_DD=5V, T_A=25°C, HDB3 coding, 2²³-1 data pattern
Figure 16. MRT Jitter Tolerance at 34368 kbit/s
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TXC-02050C-MB
Ed. 1, May 2002