Sony CXB1577Q Datasheet

– 1 –

CXB1577Q

E96Z24-PS

Post-Amplifier for Optical Fiber Communication Receiver

Description

The CXB1577Q achieves the 2R optical-fiber communication receiver functions (Reshaping and Regenerating) on a single chip. This IC is equipped with the signal detection function, which is used to enable TTL/ECL outputs. Also, the output disable function performs the output shutdown. 3.3V/5.0V can be used for the supply voltage.

Features

• Output disable function (TTL input)

• Signal detection function (TTL/ECL output)

• Supply voltage supports both 3.3V/5.0V

Applications

• SONET/SDH: 622.08Mbps

• Fibre Channel: 531.25Mbps

: 1.062Gbps

• Gigabit-Ethernet: 1.25Gbps

Absolute maximum Ratings

• Supply voltage VCC – VEE –0.3 to +7 V

• Storage temperature Tstg –65 to +150 °C

• Input voltage difference VD – VD Vdif 0 to +2 V

• SW input voltage Vi VEE to VCC V

• ECL output current IOQ/SD-ECL –30 to 0 mA

• TTL output current (High level) IOH SD-TTL –20 to 0 mA

• TTL output current (Low level) IOL SD-TTL 0 to 20 mA

Recommended Operating Conditions

• Supply voltage VCC – VEE 3.3 ± 0.2/5 ±0.25 V

• Termination voltage (for data) VCC – VTD 1.8 to 2.2 V

• Termination voltage (for alarm 1,alarm 2) VTA VEE V

• Termination resistance (for data) RTD 46 to 56 Ω

• Termination resistance (for alarm 1) RTA1 240 to 300 Ω

• Termination resistance (for alarm 2) RTA2 460 to 560 Ω

• Operating temperature Ta –40 to +85 °C

Structure

Bipolar silicon monolithic IC

Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.

40 pin QFP (Plastic)

—

– 2 –

CXB1577Q

Block Diagram and Pin Configuration

V

EE

4

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

2627

28

29

30

40

39

38

37

36

35

34

31

32

33

1

N.C.

V

EE

3

ODIS

SW

VC2

N.C.

V

EE

1

V

EE

2

N.C.

VC3

CAP3

CAP2

V

EE

2

V

EE

I

DN

UP

N.C.

VCC3

QB

Q

VC1

SDB-ECL

SDB-TTL

SD-TTL

V

CC4

TM

V

CC1

N.C.

CAP1B

CAP1

D

V

CC2

V

CC

2

VC0

DB

V

EE1

SD-ECL

peak hold peak hold

∆V

– 3 –

CXB1577Q

Pin Description

No.

1

VEE3

–3.3V

/

–5V

Negative power supply for ECL output buffer.

Switches the identification maximum voltage amplitude. High voltage when open; the identification maximum voltage amplitude becomes 40mVp-p. Low voltage when connected to VEE; the amplitude becomes 20mVp-p.

2

ODIS

0V

(Open)

or

–3.3V

/

–5V

3

SW

0V

(Open)

or

–3.3V

/

–5V

Switches 3.3V/5V. Short this pin to Vcc for 3.3V between Vcc and VEE. Leave this pin open for 5V between Vcc and VEE.

No connected.

Negative power supply for digital block.

Negative power supply for analog block.

Chip temperature monitor.

4

VCC2

0V

6

VC2

0V

/

–1.7V

(Open)

7

N.C.

8 9

10

5

VEE2

–3.3V

/

–5V

VEE1

–3.3V

/

–5V

11

TM

–1.8V

/ –3.5V

Controls the output shutdown function. High voltage when open; the Q output is fixed to Low. Low voltage when connected to VEE; the D input results in the Q output with ECL level. TTL level is also available.

Symbol

Typical pin voltage

DC

AC

Equivalent circuit

Description

VCC2

VEE2

40k

60k

3

2

VCC2

VEE2

VREF

10k

300

5

VCC2

VEE2

6k

2k

Positive power supply for digital block.

10

11

VEE1

– 4 –

CXB1577Q

12

13

14 15

16

17

18

19 20

21

22

23

24

25

VCC1

VC0

N.C. CAP1B

CAP1

DB

D

VEE1 VCC2

N.C.

UP

DN

VEEI

VEE2

0V

–0.9V

to

–1.7V –0.9V

to

–1.7V

Positive power supply for analog block.

No connected.

Switches 3.3V/5V. Short this pin to Vcc for 3.3V between Vcc and VEE. Leave this pin open for 5V between Vcc and VEE.

Pins 15 and 16 connect a capacitor which determines the cut-off frequency for DC feedback block. Pins 17 and 18 are input pins for limiting amplifier block. Input the signal with AC coupled.

DC

AC

VCC3

VEE3

6k

2k

13

Negative power supply for analog block.

Positive power supply for digital block. No connected.

Connects a resistor for alarm level setting. Default voltage can be generated without an external resistor by shorting the VEEI pin to VEE.

Generates the default voltage between UP and DOWN. The voltage (8.0mV for input conversion) can be generated between UP and DOWN (Pins 22 and 23)

as alarm setting level

by connecting this pin to VEE.

–1.3V

–3.3V

/–5V

0V

–3.3V

/–5V

–3.3V

/–5V

16

15

1k

18

17

1k

V

CC1

V

EE1

2007.5k

100p

2007.5k

No.

Symbol

Typical pin voltage

Equivalent circuit

Description

23

24

VCC2

VEE2

100

22

986

100

140.9

VCS

SW

Negative power supply for digital block.

0V

/

–1.7V

(Open)

– 5 –

CXB1577Q

32

DC

AC

26

CAP2

–1.8V

Connects a peak hold circuit capacitor for alarm block. 470pF should be connected to Vcc each.

CAP2 pin connects a peak hold capacitor for alarm level setting block. CAP3 pin connects a peak hold capacitor for limiting amplifier signal.

26

VCC2

VEE2

80

200

5µA

10p

27

CAP3

–1.8V

28

29 30

31

VC3

VEE4 N.C. VCC4

0V

/–1.7V

(Open)

–3.3V

/–5V

0V

Switches 3.3V/5V. Short this pin to Vcc for 3.3V between Vcc and VEE. Leave this pin open for 5V between Vcc and VEE.

VCC2

VEE2

80

200

5µA

10p

27

VCC3

VEE3

6k

2k

28

VC1

0V

–1.7V

(Open)

Switches 3.3V/5V. Short this pin to Vcc for 3.3V between Vcc and VEE. Leave this pin open for 5V between Vcc and VEE.

VCC3

VEE3

6k

2k

32

No.

Symbol

Typical pin voltage

Equivalent circuit

Description

Negative power supply for TTL output buffer.

No connected. Positive power supply for TTL

output buffer.

– 6 –

CXB1577Q

DC

AC

33

SD-TTL

VEE

or

VEE +

3V

Alarm signal TTL level output.

VCC4

VEE4

33

40k

34

SDB-TTL

VEE

or

VEE +

3V

3536SD-ECL

SDB-ECL

–0.9V

or

–1.7V

–0.9V

or

–1.7V

Alarm signal ECL level output. Terminate this pin in 510Ω to V

EE

at

VEE = 5V; in 270Ω

to V

EE at VEE

= 3.3V.

VCC4

VEE4

40k

34

36

35

VCC3

VEE3

No.

Symbol

Typical pin voltage

Equivalent circuit

Description

Alarm signal TTL level output.

– 7 –

CXB1577Q

DC

AC

37

Q

–0.9V

or

–1.7V

Data signal output. Terminates this pin in 50Ω to VTT = Vcc–2V.

VCC3

VEE3

38

37

38 QB

–0.9V

or

–1.7V

39

40

VCC3

N.C.

0V

No.

Symbol

Typical pin voltage

Equivalent circuit

Description

Positive power supply for ECL output buffer.

No connected.