CS61584A 데이터 시트보기 (PDF) - Cirrus Logic

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CS61584A

Dual T1/E1 Line Interface

Cirrus Logic 

DS261PP5

CS61584A

NORMALIZED

AMPLITUDE

1.0

0.5

ANSI T1.102

SPECIFICATION

Percent of

nominal

peak

voltage

120

110

100

90

80

269 ns

244 ns

194 ns

50

G.703

Specification

0

CS61584A

10

OUTPUT

PULSE SHAPE

0

-10

-0.5

-20

0

250

500

750

1000

TIME (nanoseconds)

219 ns

488 ns

Nominal Pulse

Figure 14. Typical Pulse Shape at DSX-1 Cross Connect Figure 15. Mask of the Pulse at the 2048 kbps Interface

CCCC

OOOO

NNNN

3210

0000

1000

0001

1001

0010

0011

0100

0101

0110

1010

0111

1100

1011

1101

1110

1111

Transmit Pulse

Width at 50%

Amplitude

Transmit Pulse Shape

244 ns (50%)

244 ns (50%)

244 ns (50%)

244 ns (50%)

350 ns (54%)

350 ns (54%)

350 ns (54%)

350 ns (54%)

350 ns (54%)

350 ns (54%)

324 ns (50%)

324 ns (50%)

324 ns (50%)

Reserved

Transmit Hi Z

Transmit Hi Z

E1: square, 2.37 V into 75 Ω

Arbitrary E1 Wave into 75 Ω

E1: square, 2.37 V into 75 Ω

Arbitrary E1 Wave into 120 Ω

DSX-1: 0-133 ft.

DSX-1: 133-266 ft.

DSX-1: 266-399 ft.

DSX-1: 399-533 ft.

DSX-1: 533-655 ft.

Arbitrary DSX-1 Waveform

DS1: FCC Part 68 Option A with undershoot

DS1: FCC Part 68 Option A (0 dB)

Arbitrary DS1 Waveform

Tristate TTIP/TRING Driver Outputs

Tristate TTIP/TRING Driver Outputs

Table 1. Line Configuration Selections

DS261FP1P5

Receiver

Slicing

Level

Line Code

Encoder /

Decoder

50%

50%

50%

50%

65%

65%

65%

65%

65%

65%

65%

65%

65%

AMI/HDB3

AMI/HDB3

AMI/HDB3

AMI/HDB3

AMI/B8ZS

AMI/B8ZS

AMI/B8ZS

AMI/B8ZS

AMI/B8ZS

AMI/B8ZS

AMI/B8ZS

AMI/B8ZS

AMI/B8ZS

50%

65%

AMI/HDB3

AMI/B8ZS

17

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