Sony CXB1573R Datasheet

Post-Amplifier for Optical Fiber Communication Receiver
Description
The CXB1573R 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.
Features
Output disable function (TTL input)
Signal detection function (TTL/ECL output)
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 +6 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
D/DB input voltage Vcc – 2 to Vcc V
ODIS input voltage VEE – 0.5 to VEE + 5.5 V
Recommended Operating Conditions
Supply voltage VCC – VEE 3.3 ± 0.2 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
Termination resistance (for alarm 1) RTA1 240 to 300
Termination resistance (for alarm 2) RTA2 460 to 560
Operating temperature Ta –40 to +85 °C
Structure
Bipolar silicon monolithic IC
– 1 –
E98401-PS
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.
CXB1573R
32 pin LQFP (Plastic)
– 2 –
CXB1573R
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
26
27
28
29
30
31
32
1
V
EE
3
ODIS
SW
VccX
V
EE
2
V
EE
1
TM
VccZ
CAP3
CAP2
V
EE
2
V
EE
I
DN
UP
VCC3
QB
Q
SDB-ECL
SDB-TTL
SD-TTL
V
CC4
V
CC1
VccY
CAP1B
CAP1
D
V
CC2
V
CC
2
DB
V
EE1
SD-ECL
peak hold peak hold
V
– 3 –
CXB1573R
Pin Description
Pin
No.
1
VEE3
0
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
0
or
3.3
(Open)
3
SW
0
or
3.3
(Open)
Positive power supply for digital block.
Negative power supply for digital block.
Negative power supply for analog block.
Chip temperature monitor.
4
VCC2 3.3
3.3
5
VccX
6
7
VEE2
0
VEE1
0
8
TM
1.6
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 (V)
DC
AC
Equivalent circuit
Description
VCC2
VEE2
40k
60k
3
2
VCC2
VEE2
VREF
10k
10k
300
Positive power supply for digital block.
VEE1
7
8
9
VCC1
3.3
Positive power supply for analog block.
– 4 –
CXB1573R
11
12
13
14
15
16
17
18
19
20
CAP1B
CAP1
DB
D
VEE1
VCC2
UP
DN
VEEl
VEE2
1.6 to
2.4
1.6 to
2.4
Pins 11 and 12 connect a capacitor which determines the cut-off frequency for DC feedback block. Pins 13 and 14 are input pins for limiting amplifier block. Input the signal with AC coupled.
DC
AC
Negative power supply for analog block.
Positive power supply for digital block.
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 17 and 18)
as alarm setting level by
connecting this pin to VEE.
2
2
0
3.3
0
0
1k
1k
V
CC1
V
EE1
2007.5k
100p
2007.5k
11
12
13
14
Pin No.
Symbol
Typical pin voltage (V)
Equivalent circuit
Description
VCC2
VEE2
100
986
100
140.9
140.9
VCS
SW
SW
17
18
19
Negative power supply for digital block.
Positive power supply for analog block.
3.3
10
VccY
– 5 –
CXB1573R
DC
AC
21
CAP2
1.5 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.
VCC2
VEE2
80
200
5µA
10p
21
22
CAP3
1.5
24
25
VEE4
VCC4
0
3.3
VCC2
VEE2
80
200
5µA
10p
22
Pin
No.
Symbol
Typical pin voltage (V)
Equivalent circuit
Description
Negative power supply for TTL output buffer.
Positive power supply for TTL output buffer.
26
SD-TTL
VEE
or
2.2
Alarm signal TTL level output.
VCC4
VEE4
40k
26
Positive power supply for ECL output buffer.
3.323
VccZ
– 6 –
CXB1573R
DC
AC
27
SDB-TTL
VEE
or
2.2
28
29
SD-ECL
SDB-ECL
1.6 or
2.4
1.6 or
2.4
Alarm signal ECL level output. Terminate this pin in 270to VEE.
VCC4
VEE4
40k
27
VCC3
VEE3
28 29
Pin
No.
Symbol
Typical pin voltage (V)
Equivalent circuit
Description
Alarm signal TTL level output.
30
Q
1.6 or
2.4
Data signal output. Terminates this pin in 50to VTT = Vcc – 2V.
VCC3
VEE3
30
31
31 QB
1.6 or
2.4
32
VCC3
3.3
Positive power supply for ECL output buffer.
– 7 –
CXB1573R
Supply current Q/QB High output voltage Q/QB Low output voltage SD-ECL/SDB-ECL High output voltage SD-ECL/SDB-ECL Low output voltage
SD-TTL/SDB-TTL High output voltage
SD-TTL/SDB-TTL Low output voltage SW High input voltage
SW Low input voltage SW High input current SW Low input current ODIS High input voltage ODIS Low input voltage ODIS High input current ODIS Low input current D/DB input resistance TM voltage
Electrical Characteristics
DC Characteristics
Item
IEE VOH VOL VOH-E VOL-E
VOH-T
VOL-T VIHSW
VILSW IIHSW IILSW VIHOD VILOD IIHOD IILOD Rin VTM
50to VTT
270to VEE
IOH = –0.4mA Ta = 0 to +85°C
IOL = 2mA Ta = 0 to +85°C
at SW pin Open: High
at ODIS pin Open: High
VIH = Vcc VIL = VEE
Iin = 1mA
–74 VCC – 1100 VCC – 1860 VCC – 1100 VCC – 1900
2.2
VCC – 0.5
0
–100
2.0 0
–400
765
1.2
–51
1020
VCC – 860
VCC – 1620
VCC – 860
VCC – 1620
0.5
VCC
0.5 10
VCC + 0.5
0.8 20
1275
2.0
mA
mV
V
µA
V
µA
V
Symbol Min. Typ. Max. UnitConditions
VCC = 3.3 ± 0.2V, VEE = GND, Ta = –40 to +85°C
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