CX28332-3X 데이터 시트보기 (PDF) - Conexant Systems

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CX28332-3X

Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit

Conexant Systems 

CX28331/CX28332/CX28333

Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit

1.0 Pin Description

1.1 Pin Assignments

Table 1-1. CX2833i-1x Pin Definitions (5 of 6)

Pin #

Signal Name

CX28331-1x CX28332-1x CX28333-1x

Description

46

—

—

REQH Ch1 Receive High EQ

—

70

70

REQH1 Gain Enable

—

31

46

REQH2 Ch2 Receive High EQ

Gain Enable

—

—

31

REQH3 Ch3 Receive High EQ

Gain Enable

Power/Ground

12

—

—

TVDD TX power Ch1

—

4

4

TVDD1

—

20

12

TVDD2 TX power Ch2

—

—

20

TVDD3 TX power Ch3

9

—

—

TVSS TX ground Ch1

—

1

1

TVSS1

—

17

9

TVSS2 TX ground Ch2

—

—

17

TVSS3 TX ground Ch3

13

—

—

RVDD RX power Ch1

—

5

5

RVDD1

—

21

13

RVDD2 RX power Ch2

—

—

21

RVDD3 RX power Ch3

16

—

—

RVSS RX ground Ch1

—

8

8

RVSS1

—

24

16

RVSS2 RX ground Ch2

—

—

24

RVSS3 RX ground Ch3

60

60

60

DVDDC Digital core power

41

41

41

DVSSC Digital core ground

79

79

79

VGG

5 V/3.3 V ESD pin (1)

73

73

73

DVDDIO Digital I/O power

28

28

28

DVSSIO Digital ground

I/O/P

Notes

I The equalizer in the CX2833i has

two gain settings. The higher gain

setting is designed to optimally

equalize a nominally-shaped (meets

the pulse template), pulse-driven

DS3 or STS-1 waveform that is

I driven through 0–900 feet of cable.

Square-shaped pulses such as E3

or DS3-HIGH require less

high-frequency gain and should use

the low EQ gain setting.

REQH = 1 high EQ gain

(DS3/STS-1 modes)

REQH = 0 low EQ gain (E3/DS3

Square Modes)

P Power pins for transmit circuitry

per channel (3.3 V).

P

P

P Ground pins for transmit circuitry

per channel.

P

P

P Power pins for receive circuitry per

channel (3.3 V).

P

Connect to 3.3 V power.

P

P Ground pins for receive circuitry

per channel.

P

Connect to ground.

P

P Digital core power for all channels

(3.3 V).

P Digital core ground for all channels.

P 5 V supply for 5 V-tolerant, digital

pad ESD diodes. No static power is

drawn from pin.

P Connect to 3.3 V digital power.

P Digital ground.

100985A

Conexant

1-9

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