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19-1523; Rev 0; 11/99
MAX3264/MAX3265 Evaluation Kits
General Description
The MAX3264 evaluation kit (EV kit) (data rate up to
1.25Gbps) evaluates the MAX3264/MAX3268 limiting
amplifiers. The MAX3265 EV kit (data rate up to
2.5Gbps) evaluates the MAX3265/MAX3269 limiting
amplifiers.
These EV kits allow easy programming of the loss-of-
signal (LOS) threshold and provide layout options for
alternate termination configurations. The circuit
includes space for a user-supplied preamplifier and
photodiode pair mounted in a TO-46 can. Both EV kits
have evaluation sites for a 16-pin TSSOP with electrical
input, a 10-pin µMAX with electrical input, and a 10-pin
µMAX with optical input (not installed). See Figure 1 for
an overview of possible configurations.
o
Easy LOS Threshold Programming
o
Allow Alternate Output Terminations
o
Circuit Includes Space for TO-46 PIN-TIA Optical
Input
o
1.25Gbps Data Rate (MAX3264EVKIT)
2.5Gbps Data Rate (MAX3265EVKIT)
Features
Evaluate: MAX3264/MAX3265/MAX3268/MAX3269
Ordering Information
PART
TEMP. RANGE IC PACKAGE
0°C to +70°C
0°C to +70°C
16 TSSOP* (MAX3264),
10 µMAX* (MAX3268)
16 TSSOP* (MAX3265),
10 µMAX* (MAX3269)
Component Suppliers
MAX3264EVKIT-SO
SUPPLIER
AVX
Murata
Sprague
Zetex USA
PHONE
803-649-0690
814-237-1431
516-435-1110
516-543-7100
FAX
803-626-3123
814-238-0490
516-435-1824
516-864-7630
*Exposed pad packages
MAX3265EVKIT-SO
Note:
Please indicate that you are using the MAX3264 or
MAX3265 EV kit when contacting these component suppliers.
MAX3264EV
U1
1
2
3
4
5
6
7
8
U2
µMAX
INPUT
1
2
3
4
5
16 TSSOP
16
15
14
13
TSSOP OUTPUT
12
11
10
9
10
µMAX
10
9
µMAX
OUTPUT
8
7
6
MAX3265EV
U1
1
2
3
4
5
6
7
8
U2
10-PIN
µMAX
PACKAGE WITH ELECTRICAL INPUT
(Preassembled)
µMAX
INPUT
1
2
3
4
5
16 TSSOP
16
15
14
13
TSSOP OUTPUT
12
11
10
9
10
µMAX
10
9
µMAX
OUTPUT
8
7
6
MAX3264
TSSOP INPUT
16-PIN TSSOP PACKAGE
(Preassembled)
TSSOP INPUT
MAX3268
MAX3264/65/68/69 EVALUATION BOARD
U3
1
2
3
4
5
10
µMAX
10
9
OPTO OUTPUT
8
7
6
10-PIN
µMAX
PACKAGE WITH OPTICAL INPUT
(Not Assembled)
MAX3264/65/68/69 EVALUATION BOARD
U3
1
2
3
4
5
10
µMAX
10
9
OPTO OUTPUT
8
7
6
Figure 1. Overview of Layout Topographies
________________________________________________________________
Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
MAX3269
MAX3265
MAX3264/MAX3265 Evaluation Kits
Evaluate: MAX3264/MAX3265/MAX3268/MAX3269
Component List
DESIGNATION
C1, C4, C6,
C9–C11,
C14–C17,C19,
C30–C32
C2, C3, C7, C8,
C12, C13
C5, C26, C27
C18, C20,
C21, C28, C29,
C33, C34
C22, C23
C24, C25
R1, R2
R3, R12
R4, R13
R5, R8, R9, R15,
R16, R17
R7, R14
R10, R11
QTY
DESCRIPTION
1000pF ±10%, 10V ceramic
capacitors (0603)
0.01µF ±10%, 10V ceramic
capacitors (0603)
0.1µF ±10%, 10V ceramic capacitors
Not installed
33µF ±10%, 16V tantalum caps
AVX TAJC336K016
2.2µF ±10%, 10V ceramic
capacitors (1206)
100Ω ±1% resistors (0603)
50kΩ variable resistors
5kΩ variable resistors
Not installed
None
2
2
330Ω ±5% resistors (0603)
0Ω resistors (0603)
None
1
1
U3
None
3
DESIGNATION
L1, L2
L3
J2–J5, J7, J8, J10,
J11
J6, J18–J20
J13, J14
J22
D1, D2
D3
U1
U2
2
2
2
2
2
6
1
2
1
1
1
QTY
2
1
8
4
DESCRIPTION
Ferrite beads
Murata BLM21A102S (0603)
Not installed
SMA connectors (edge mount)
2-pin headers (0.1in centers)
Not placed
3-pin header (0.1in centers)
Red LEDs
Not installed
MAX3264CUE (MAX3264EVKIT)
MAX3265CUE (MAX3265EVKIT)
MAX3268CUB (MAX3264EVKIT)
MAX3269CUB (MAX3265EVKIT)
Not installed
Shunts for J6, J22, and J18 or J19
or J20
MAX3264 or MAX3265 EV kit circuit
board, Rev. B
MAX3264/MAX3265/MAX3268/
MAX3269 data sheet
14
6
3
7
Quick Start
MAX3264/MAX3265 TSSOP Package
1) Install a shunt on J18 to apply power (J19, J20 open).
2) Install a shunt on terminals 1 and 2 of J22 to disable
squelch.
3) Connect OUT+ and OUT- to a 50Ω terminated oscil-
loscope.
4) Apply an input (10mVp-p to 1.2Vp-p) to J4 and J5.
5) Connect a +3.0V to +5.5V power supply to the VCC
pad, then connect the power-supply ground to the
GND pad.
6) Adjust the LOS threshold with R3 and R4.
3) Connect OUT+ and OUT- to a 50Ω terminated oscil-
loscope.
4) Apply 2V to VCC, ground to GND, and a -1.0V to
-3.5V power supply to VEE.
5) Adjust the LOS threshold with R12 and R13.
Detailed Description
LOS Voltage Threshold Adjustment
Potentiometers R3, R4, R12, and R13 adjust the V
TH
voltage, which programs the LOS threshold. Refer to
the MAX3264/MAX3265/MAX3268/MAX3269 data sheet
for details.
CML Output Buffer
The MAX3264/MAX3265 CML output circuits provide
high tolerance to impedance mismatches and inductive
connectors. The output current can be set for either of
two levels. When the LEVEL pin is left unconnected (J6
open), the output current is approximately 16mA.
Connecting the LEVEL pin to ground (J6 closed) sets
the output current to approximately 20mA.
MAX3268/MAX3269 µMAX Package
with Electrical Input
1) Install a shunt on J19 to apply power (J18, J20 open).
2) Apply an input (10mVp-p to 1.2Vp-p) to J7 and J8.
2
_______________________________________________________________________________________
MAX3264/MAX3265 Evaluation Kits
Evaluate: MAX3264/MAX3265/MAX3268/MAX3269
VCC1
C2
0.01µF
1
C5
0.1µF
J4
J5
C8
0.01µF
J6
R4
5k
R3
50k
C7
0.01µF
2
3
4
5
6
7
8
1
2
3
CW
1
2
3
CW
CAZ1
CAZ2
V
EE
IN+
IN-
GND
LEVEL
TH
TP5
N.C.
16
15
14
13
12
VCC1
10
9
TP2
LOS-
D1
NOT
INSTALLED
R7
330Ω
TP1
LOS+
C4
1000pF
VCC1
C10
1000pF
C1
1000pF
R2
100Ω
C3
0.01µF
J3
J22
1
VCC1
R1
100Ω
VCC1
J2
U1
MAX3264
MAX3265
SQUELCH
V
CC
OUT+
OUT-
V
CC
LOS+
LOS-
D3
R5
330Ω
Figure 2. MAX3264/MAX3265 EV Kits Schematic (TSSOP Package)
R10
0Ω
VEE1
C11
1000pF
VCC2
C14
1000pF
R8
NOT INSTALLED
R9
NOT INSTALLED
VCC2
7
6
C16
1000pF
R11
0Ω
J11
D2
R14
330Ω
C17
1000pF
VEE1
SP3
SP4
SEE TABLE 2 FOR
ALTERNATE OUTPUT TERMINATIONS.
SP7
SHORT
J10
VCC2
J7
J8
C12
0.01µF
1
2
3
V
EE
IN+
IN-
GND
TH
U2
MAX3268
MAX3269
V
CC
OUT+
OUT-
V
CC
LOS-
10
9
8
OPEN OPEN
C13
0.01µF
VEE1
1
2
VEE1
4
5
R13
5k 3
C15
1000pF
R12
1 50k
2
3
CW
TP6
TP3
CW
Figure 3. MAX3264/MAX3265 EV Kits Schematic (µMAX Package with Electrical Input)
L2
PC BOARD POWER
DISTRIBUTION
J15
VCC
C22
33µF
C24
2.2µF
C27
0.1µF
J18
C19
1000pF
J19
C9
1000pF
C6
1000pF
VCC2
C31
1000pF
L1
J17
VEE
VCC3
VCC3
1
2
3
C29
1000pF
C28
0.1µF
C34
0.01µF
R17
100Ω
4
5
10
9
8
7
6
TP4
VCC3
C21
0.01µF
J14
C18
1000pF
C32
1000pF
R15
100Ω
SP1 SP2
R16
100Ω
OPEN OPEN
SEE TABLE 3 FOR
ALTERNATE OUTPUT
TERMINATIONS.
C30
1000pF
C20
0.01µF
C23
33µF
C25
2.2µF
C26
0.1µF
J20
VCC1
J16
GND
VCC3
VEE1
J13
COMPONENTS NOT
INSTALLED FOR OPTICAL
CONFIGURATION
L3
J21
C33
0.01µF
V
EE
IN+
IN-
GND
TH
U3
MAX3268
MAX3269
V
CC
OUT+
OUT-
V
CC
LOS-
VCC3
Figure 4. MAX3264/MAX3265 EV Kits Schematic (µMAX Package with Optical Input)
_______________________________________________________________________________________
3
MAX3264/MAX3265 Evaluation Kits
Evaluate: MAX3264/MAX3265/MAX3268/MAX3269
Table 1. Jumpers and Potentiometers
NAME
J18
J19
J20
J22 (Pins 1–2)
J22 (Pins 2–3)
R3, R4
R12, R13
FUNCTION
Applies power to U1
Applies power to U2
Applies power to U3
Disables squelch
Enables squelch
Adjusts LOS threshold of U1 (0Ω is
clockwise)
Adjusts LOS threshold of U2 (0Ω is
clockwise)
SP3
SP4
SP7
NAME
SP1
SP2
FUNCTION
Solder jumper for alternate terminations
(Table 3)
Solder jumper for alternate terminations
(Table 3)
Solder jumper for alternate terminations
(Table 2)
Solder jumper for alternate terminations
(Table 2)
Normally shorted
Table 2. Output Terminations for Electrical Input (U2)
OUTPUT LOGIC
OUTPUT TERMINATIONS
CONFIGURATION 1 (Default)
V
CC
= 2V
U2
MAX3268
MAX3269
CONDITIONS
OUT+
R10
0Ω
Z
O
= 50Ω
Z
O
= 50Ω
R11
0Ω
OSCILLOSCOPE
OUT-
V
EE
= -1.0V TO -3.5V
50Ω
50Ω
SP3 open, SP4 open,
R8 = R9 = do not install,
R10 = R11 = 0Ω,
V
CC
= 2V,
V
EE
= -1.0V to -3.5V,
GND = 0V,
oscilloscope is
referenced to ground
0V
CONFIGURATION 2
V
CC
= 3V TO 5.5V
PECL
MAX3268CUB/
MAX3269CUB
U2
MAX3268
MAX3269
OUT+
R8
330Ω
R10
0.1µF
Z
O
= 50Ω
Z
O
= 50Ω
OSCILLOSCOPE
OUT-
V
EE
= 0V
R9
330Ω
R11
0.1µF
50Ω
50Ω
SP3 closed, SP4 open,
R8 = R9 = 330Ω,
R10 = R11 = 0.1µF,
V
CC
= 3V to 5.5V,
V
EE
= GND = 0V
V
EE
= 0V
0V
CONFIGURATION 3
V
CC
= 3V TO 5.5V
U2
MAX3268
MAX3269
OUT+
R10
0Ω
Z
O
= 50Ω
Z
O
= 50Ω
R11
0Ω
OSCILLOSCOPE
OUT-
V
EE
= 0V
50Ω
50Ω
SP3 open, SP4 open,
R8 = R9 = do not install,
R10 = R11 = 0Ω,
V
CC
= 3V to 5.5V,
V
EE
= GND = 0V,
oscilloscope must be
referenced to V
CC
- 2V
V
CC
- 2V
4
_______________________________________________________________________________________
MAX3264/MAX3265 Evaluation Kits
Evaluate: MAX3264/MAX3265/MAX3268/MAX3269
Table 2. Output Terminations for Electrical Input (U2) (continued)
OUTPUT LOGIC
CONFIGURATION 4
V
CC
= 3V TO 5.5V
V
CC
= 3V TO 5.5V
R8
100Ω
R10
0.1µF
Z
O
= 50Ω
Z
O
= 50Ω
R9
100Ω
R11
0.1µF
50Ω
50Ω
OSCILLOSCOPE
OUTPUT TERMINATIONS
CONDITIONS
CML
MAX3265CUB
U2
MAX3265
OUT+
OUT-
V
EE
= 0V
SP3 open, SP4 closed,
R8 = R9 = 100Ω,
R10 = R11 = 0.1µF,
V
CC
= 3V to 5.5V,
V
EE
= GND = 0V
0V
Table 3. Output Terminations for Optical Input (U3)
OUTPUT LOGIC
CONFIGURATION 1
V
CC
= 3V TO 5.5V
U3
MAX3268
MAX3269
OUTPUT TERMINATIONS
CONDITIONS
OUT+
R15
330Ω
C20
0.1µF
Z
O
= 50Ω
Z
O
= 50Ω
OSCILLOSCOPE
OUT-
R16
330Ω
V
EE
= 0V
V
EE
= 0V
C21
0.1µF
50Ω
50Ω
SP1 closed, SP2 open,
R15 = R16 = 330Ω,
C20 = C21 = 0.1µF,
V
CC
= 3V to 5.5V,
V
EE
= GND = 0V
0V
PECL
MAX3268CUB/
MAX3269CUB
CONFIGURATION 2
V
CC
= 3V TO 5.5V
U3
MAX3268
MAX3269
OUT+
C20
0Ω
Z
O
= 50Ω
Z
O
= 50Ω
C21
0Ω
OSCILLOSCOPE
OUT-
V
EE
= 0V
50Ω
50Ω
SP1 open, SP2 open,
R15 = R16 = do not install,
C20 = C21 = 0Ω,
V
CC
= 3V to 5.5V,
V
EE
= GND = 0V,
oscilloscope must
be referenced to
V
CC
- 2V
V
CC
- 2V
CONFIGURATION 3
V
CC
= 3V TO 5.5V
V
CC
= 3V TO 5.5V
OUT+
R15
100Ω
C20
0.1µF
Z
O
= 50Ω
Z
O
= 50Ω
R16
100Ω
C21
0.1µF
50Ω
50Ω
OSCILLOSCOPE
CML
MAX3265CUB
U3
MAX3265
OUT-
V
EE
= 0V
SP1 open, SP2 closed,
R15 = R16 = 100Ω,
C20 = C21 = 0.1µF,
V
CC
= 3V to 5.5V,
V
EE
= GND = 0V
0V
_______________________________________________________________________________________
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