MAX3967
270Mbps SFP LED Driver
________________________________________________________________ Maxim Integrated Products 1
TCNOM
1
2
3
4
5
6
7 8 9 101112
13
14
15
16
17
18
192021222324
TC
PB1
PB2
PB3
V
EEOUT
OUT+
OUT+
OUT-
N.C.
V
CCOUT
V
CCOUT
V
CC
N.C.
MON
MODSET
IN-
IN+
V
CC
VEETX_DISABLE
TCMIN
TOP VIEW
THE EXPOSED PAD MUST BE CONNECTED TO GROUND FOR
PROPER THERMAL AND ELECTRICAL PERFORMANCE
MAX3967
V
EEOUT
OUT-
THIN QFN (4mm x 4mm)
Pin Configuration
19-3252; Rev 0; 5/04
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Ordering Information
PART TEMP RANGE PIN-PACKAGE
MAX3967ETG -40°C to +85°C 24 Thin QFN
MAX3967E/D -40°C to +85°C Dice*
General Description
The MAX3967 is a programmable LED driver for fiber
optic transmitters operating at data rates up to
270Mbps. The circuit contains a high-speed current driver with programmable temperature coefficient (tempco), adjustments for LED prebias voltage, and a disable
feature. The circuit accepts PECL data inputs, and
operates from a single +2.97V to +5.5V power supply.
The SFP LED driver can switch up to 100mA into typical
high-speed light-emitting diodes. As temperature
increases, the device’s modulation current increases
with a tempco that is programmable from 2500ppm/°C
to 12,000ppm/°C. The modulation current is programmed with a single external resistor.
The MAX3967’s LED prebias voltage is programmable
from 400mV to 925mV. The prebias circuit produces
peaking current, which improves the LED switching
speed.
Complementary current outputs help to maintain a constant supply current, reducing EMI and supply noise
generated by the transmitter module. The MAX3967 is
available in die form, or in a 4mm x 4mm, 24-pin thin
QFN package.
Applications
Multimode LED Transmitters
Fast Ethernet/FDDI
155Mbps LAN ATM Transceivers
ESCON Receivers
SFP Transceivers
Features
♦ TX_DISABLE for SFP Compatibility
♦ Single +2.97V to +5.5V Power Supply
♦ Adjustable Temperature Compensation
♦ Adjustable Modulation Current
♦ Complementary Output Reduces Supply Noise
♦ Programmable LED Prebias Voltage
♦ Available in 24-Pin QFN or Die
Typical Operating Circuits appear at end of data sheet.
*Dice are tested and guaranteed only at T
A
= +25°C.
查询MAX3967供应商
MAX3967
270Mbps SFP LED Driver
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
Supply Voltage at VCC, V
CCOUT
(
V
EE
,
V
EEOUT
= 0V) ..............................................-0.5V to +7V
Current into OUT+, OUT-................................-40mA to +160mA
Differential Output Voltage (OUT+ to OUT-) .........-3.3V to +3.3V
Voltage at PB1, PB2, PB3,
IN+, IN-, OUT+, OUT-, TX_DISABLE......-0.5V to (V
CC
+ 0.5V)
Voltage at TCMIN, TCNOM, TC, MODSET, MON ....-0.5V to +2V
Continuous Power Dissipation (T
A
= +85°C)
24-Lead Thin QFN (derate 20.8mW/C
°
above +85°C).............................................................1354mW
Operating Junction Temperature Range...........-40°C to +150°C
Die Attach Temperature...................................................+400°C
Storage Temperature Range.............................-50°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
(Load as specified in Figure 1; VCC= +2.97V to +5.5V (at the VCCpins); V
EE, VEEOUT
= 0V; TA= -40°C to +85°C, unless otherwise
noted. Temperature coefficients are referenced to T
A
= +25°C. Typical values are at VCC= +3.3V, TA= +25°C, unless otherwise
noted. Dice are tested at T
A
= +25°C only.)
PARAMETER
CONDITIONS
UNITS
Data Input High Voltage Referenced to VCC, DC-coupled input
V
Data Input Low Voltage Referenced to VCC, DC-coupled input
V
Supply Current I
CC
(Note1) 30 39 mA
Input Current at IN+ or IN- -50 +50 µA
TA = -40°C 110
TA = +25°C 124
R
MODSET
= 698Ω
(Note 2)
T
A
= +85°C 139
TA = -40°C14
TA = +25°C18
R
MODSET
= 3.0kΩ
(Note 3)
T
A
= +85°C22
Modulation Current
(Note 3)
75
mA
PB1, PB2, PB3 = (open, open, open)
PB1, PB2, PB3 = (VEE, VEE, open)
Prebias Voltage
PB1, PB2, PB3 = (V
EE
, VEE, VEE)
V
Maximum tempco (TC open)
Nominal tempco (TC shorted to TCNOM)
Temperature Coefficient of
Modulation Current
Minimum tempco (TC shorted to TCMIN)
ppm/°C
Prebias Resistor
66 78 90 Ω
TX_DISABLE Resistance Resistance to VEE (Note 4) 50 65 100 kΩ
TX_DISABLE High V
IH
2.0 V
TX_DISABLE Low V
IL
0.8 V
Monitor Gain
I
MON
/ I
MODSET
, V
MON
< 1.1V,
R
MODSET
= 1kΩ, TC = TCMIN
1
A/A
Note 1: R
MODSET
= 1kΩ. Excludes I
OUT
+ and I
OUT
-, TX_DISABLE high or low.
Note 2: TC connected to TCMIN.
Note 3: V
CC
=
+3.3V, V
LED
=
1.55V, prebias voltage programmed at 0.625V (nominal), T
A
= +25°C. R
MODSET
= 1kΩ, (programs
approximately 80mA), TC connected to TCNOM.
Note 4: The TX_DISABLE pin is internally pulled low. The driver is enabled when TX_DISABLE is left open.
SYMBOL
MIN TYP MAX
-1.165 -0.880
-1.810 -1.475
66.0
R
PREBIAS
0.368 0.400 0.451
0.575 0.625 0.696
0.848 0.925 1.026
12,000
3600
2500
0.92
84.5
1.08
MAX3967
270Mbps SFP LED Driver
_______________________________________________________________________________________ 3
AC ELECTRICAL CHARACTERISTICS
(Load as specified in Figure 1, unless otherwise noted. VCC= +2.97V to +5.5V (at the VCCpins), R
MODSET
= 1kΩ, TA= -40°C to
+85°C. Input data edge speed = 1ns (typ), PB1 = PB2 = V
EE
, PB3 = open. Typical values are at VCC= +3.3V, TC connected to
TCNOM, T
A
= +25°C.) (Note 5)
PARAMETER
CONDITIONS
UNITS
Data Input Range Differential input
mV
P-P
Output-Current Edge Speed
615
ps
Output-Current Pulse-Width
Correction (PWC)
Note 6 -80 ps
266Mbps (Note 7) 140
Output-Current Data-Dependent
Jitter
DJ
155Mbps (Note 8) 150 250
ps
P-P
Random Jitter RJ 3
ps
RMS
TX_DISABLE Assert Time t_off
Time from rising edge of TX_DISABLE to
output at 10% of steady state
0.5 µs
TX_DISABLE Negate Time t_on
Time from rising edge of TX_DISABLE to
output at 90% of steady state
0.5 µs
Power-On Time t_init
Time from V
CC
> 2.97V to output at 90% of
steady state
0.1 2 ms
Figure 1. MAX3967 Output Test Loads
SWITCHING DIODE
OSCILLOSCOPE
OUT-
L1
OUT+
OUT+
OUT-
AC ELECTRICAL LOADDC ELECTRICAL LOAD
FOR PREBIAS VOLTAGE
DC ELECTRICAL LOAD
(EXCEPT PREBIAS VOLTAGE)
OUT+
OUT-
MAX3967MAX3967MAX3967
V
CC
V
CC
V
LED
1.55V
50Ω
5Ω
50Ω
0.1µF
0.1µF
FERRITE
BEAD
V
CC
V
PREBIAS
Note 5: AC characteristics are guaranteed by design and characterization.
Note 6: PWC = (width
CURRENT ON
- width
CURRENT OFF
) / 2.
Note 7: Test pattern is a K28.5 (0011 1110 1011 0000 0101) transmitted at 266Mbps.
Note 8: Test pattern is equivanlent to a 2
13
- 1 PRBS containing 72 consecutive zeros or 72 consecutive ones.
SYMBOL
20% to 80%, input is a 12.5MHz square wave 300
MIN TYP MAX
500 2400
1230
0.01
0.01
MAX3967
270Mbps SFP LED Driver
4 _______________________________________________________________________________________
Typical Operating Characteristics
(MAX3967ETG in Maxim evaluation board, VCC= +3.3V, PB1 = PB2 = VEE, PB3 = open, TC connected to TCNOM, R
MODSET
= 1kΩ,
TA= +25°C, unless otherwise noted.)
40
38
36
34
32
30
28
26
24
22
20
-40 -20 -10-30 0 10 20 30 40 50 60 70 80 90
SUPPLY CURRENT
vs. TEMPERATURE
MAX3967 toc01
AMBIENT TEMPERATURE (°C)
SUPPLY CURRENT (mA)
EXCLUDES CURRENT INTO OUT+ AND OUT-
VCC = 5.0V
VCC = 3.3V
0
40
20
80
60
100
120
-40 20 40-20 0 60 80
MODULATION CURRENT
vs. TEMPERATURE
MAX3967 toc02
AMBIENT TEMPERATURE (°C)
MODULATION CURRENT (mA)
MINIMUM TEMPCO
NOMINAL TEMPCO
MAXIMUM TEMPCO
0
40
20
80
60
100
120
0608020 40 100 120 140
DIE MODULATION CURRENT
vs. TEMPERATURE
MAX3967 toc03
JUNCTION TEMPERATURE (°C)
MODULATION CURRENT (mA)
MINIMUM TEMPCO
NOMINALTEMPCO
MAXIMUM TEMPCO
100,000
1000
1 10 100
MODULATION CURRENT TEMPCO
vs. R
TC
MAX3967 toc04
RTC (kΩ)
MODULATION CURRENT TEMPCO (ppm/
°
C)
10,000
200
10
500 1k 10k
MODULATION CURRENT
vs. R
MODSET
MAX3967 toc05
R
MODSET
(Ω)
MODULATION CURRENT (mA)
100
MINIMUM TEMPCO
NOMINALTEMPCO
MAXIMUM TEMPCO
200
10
500
1k
8k
DIE MODULATION CURRENT
vs. R
MODSET
MAX3967 toc06
R
MODSET
(Ω)
MODULATION CURRENT (mA)
100
MAXIMUM TEMPCO
NOMINALTEMPCO
MINIMUM TEMPCO
EYE DIAGRAM (ELECTRICAL)
266Mbps
MAX3967 toc07
500ps/div
PATTERN = 2
31
- 1 PRBS
EYE DIAGRAM (OPTICAL)
155Mbps
MAX3967 toc08
1ns/div
RECEIVER BW = 200MHz, VCC = 2.97V, TA = +85°C,
P
AVE
= -17.1dBm, PATTERN = 2
31
- 1 PRBS
EYE DIAGRAM (OPTICAL)
155Mbps
MAX3967 toc09
1ns/div
RECEIVER BW = 200MHz, VCC = 5.5V, TA = -40°C,
P
AVE
= -15.8dBm, PATTERN = 2
31
- 1 PRBS
MAX3967
270Mbps SFP LED Driver
_______________________________________________________________________________________ 5
EYE DIAGRAM (OPTICAL)
155Mbps
MAX3967 toc10
1ns/div
RECEIVER BW = 200MHz, VCC = 5.5V, TA = +85°C,
P
AVE
= -17.1dBm, PATTERN = 2
31
- 1 PRBS
EYE DIAGRAM (OPTICAL)
155Mbps
MAX3967 toc11
1ns/div
RECEIVER BW = 200MHz, VCC = 2.97V, TA = -40°C,
P
AVE
= -15.8dBm, PATTERN = 2
31
- 1 PRBS
0
2
1
4
3
5
6
0 102030405060708090
RANDOM JITTER
vs. TEMPERATURE
MAX3967 toc12
AMBIENT TEMPERATURE (°C)
RANDOM JITTER (ps
RMS
)
VCC = 5.0V
MINIMUM TEMPCO
VCC = 3.3V
MAXIMUM TEMPCO
TX_DISABLE NEGATE TIME
MAX3967 toc13
4ns/div
LED
OUTPUT
TX_DISABLE
t_on
TX_DISABLE ASSERT TIME
MAX3967 toc14
4ns/div
LED
OUTPUT
TX_DISABLE
t_off
Typical Operating Characteristics (continued)
(MAX3967ETG in Maxim evaluation board, VCC= 3.3V, PB1 = PB2 = VEE, PB3 = open, TC connected to TCNOM, R
MODSET
= 1kΩ,
TA= +25°C, unless otherwise noted.)
MAX3967
Detailed Description
The MAX3967 provides a flexible current drive for the
modulation of fiber optic light-emitting diodes (LEDs).
The circuit is designed to be used with +3.3V or +5V
power supplies. The IC provides up to 100mA of modulation current. An adjustable prebias current source
sets the LED prebias voltage. An integrated resistor
provides passive peaking and optical pulse-width compensation.
Figure 2 shows a block diagram of the MAX3967, which
comprises a reference-voltage generator, modulationcurrent generator, input buffer with disable, prebiascurrent generator, main output driver, complementary
output driver, and LED-compensation network.
Temperature Compensation
The reference-voltage generator circuit provides two
voltage sources that create modulation-current temperature compensation. A positive modulation-current temperature coefficient (tempco) is useful to compensate
for the temperature characteristics of typical fiber optic
LEDs. The first source has a temperature-stable output.
The second source has a temperature-increasing output with a tempco of approximately 12,000ppm/°C (relative to +25°C). A resistor-divider between the two
reference generators programs the modulation-current
tempco. For maximum modulation-current tempco,
leave the TC pin disconnected. For a tempco of
approximately 3600ppm/°C, connect TC to TCNOM. To
obtain the minimum tempco, connect TCMIN to TC.
Intermediate tempco values can be programmed by
connecting an external resistor (RTC) between TCMIN
and TC.
Input Buffer
The inputs are connected to the PECL-compatible differential input buffer. If left unconnected, IN+ is internally pulled to a PECL low and IN- is pulled to a PECL
high, causing low current at OUT+. The input impedance of IN+ and IN- is approximately 50kΩ.
270Mbps SFP LED Driver
6 _______________________________________________________________________________________
PIN NAME FUNCTION
1 TCNOM Shorting TC to TCNOM provides a modulation tempco of approximately 3600 ppm/°C.
2TC
A resistor (R
TC
) connected between the TC and TCMIN pins sets the tempco of the modulation
current. Leaving R
TC
unconnected provides the maximum tempco.
3, 4, 5
Programs the Prebias Voltage at the OUT+ Pin (Table 1)
6, 7 V
EEOUT
Ground for the Output-Current Drivers
8, 9 OUT+ Current Output Pins
10, 11 OUT- Complementary Current Output Pins
12, 16 N.C. Not Connected
13, 14 V
CCOUT
Supply Connection for the Output-Current Drivers
15, 19 V
CC
Provides Current to the Internal Amplifiers
17 MON The Current Sourced from the MON Pin is Proportional to the Modulator Current
18 MODSET A Resistor from MODSET to VEE Programs the LED Modulation Current
20 IN- Inverting Data Input
21 IN+ Noninverting Data Input
22
Transmit Disable. When high, the current at the OUT+ pins is in the low state. The transmitter is
enabled when TX_DISABLE is open.
23 V
EE
Ground for internal amplifiers.
24 TCMIN Shorting TC to TCMIN provides the minimum modulation-current tempco.
Pin Description
PB1, PB2, PB3
TX_DISABLE
Modulation-Current Generator
The modulation-current generator circuit provides control of the modulation-current amplitude. This amplitude
is determined by the voltage at the MODSET pin and
external resistor R
MODSET.
Do not connect bypass capacitors at the MODSET pin.
Capacitance at this pin increases high-frequency output noise. The MON pin provides an optional modulation-current monitor. The current sourced from the MON
pin is 1/96 of the modulation current. If used, the pin
should be connected to V
EE
through a resistor. The
resistance must be chosen so the voltage on MON
does not exceed 1.1V. If not used, leave MON open.
Prebias Current Generator
A prebias voltage (V
PREBIAS
) can be applied to the
LED to improve switching speed. The prebias current
generator creates a current that flows through the 78Ω
prebias resistor in the output stage, creating a prebias
voltage. The prebias voltage can be adjusted by selectively connecting pins PB1, PB2, and PB3 to V
EE
. Table 1
describes the functions of PB1, PB2, and PB3.
Output Current Drivers
The modulation-current reference is switched and
amplified by the output stages.
LED package lead inductance causes ringing and
overshoot, which can be compensated with an RC filter
network. The MAX3967 includes 35Ω and 12pF of inter-
MAX3967
270Mbps SFP LED Driver
_______________________________________________________________________________________ 7
Figure 2. Functional Diagram
12pF
MODULATIONCURRENT
GENERATOR
REFERENCE-VOLTAGE GENERATOR
PREBIAS-CURRENT
GENERATOR
COMPLEMENTARY
OUTPUT
24X
MAIN
OUTPUT
24X
V
TEMP
TCMIN
PB1 PB2 PB3
TCNOM
TC
MODSET MON
1.2V
OUT-
OUT+
IN-
IN+
INPUT
BUFFER
GAIN 4X
MAX3967
R
MODSET
V
CCOUT
TX_DISABLE
50Ω
35Ω
5Ω
V
CC
R
PREBIAS
78Ω
10
0
MAX3967
nal compensation. The compensation network can be
optimized by adding additional components between
V
CCOUT
and OUT+.
The MAX3967 includes a complementary output driver,
which is switched 180° out of phase with the main output. This configuration helps to maintain constant current flow from the voltage supply, reducing noise and
EMI. A large diode and a 5Ω resistor are connected in
series with the negative output (OUT-) to emulate the
LED load at OUT+.
Peaking Current
The prebias resistor provides peaking current to improve
the LED switching speed. The peaking magnitude is
given by the following equation:
The peaking amplitude is equal for rising and falling
data transitions.
Design Procedure
Select an LED
For best performance, select a high-efficiency, lowinductance LED. LED inductance causes large voltage
swings and ringing.
Program the Modulation-Current Tempco
Select a modulation-current tempco that provides nearly constant LED output power as temperature varies.
For the minimum tempco, connect TCMIN to the TC pin.
For a tempco of approximately 3600ppm/°C, connect
TC to TCNOM and leave TCMIN unconnected. For the
maximum tempco, leave TCMIN, TCNOM, and TC
unconnected.
See the Modulation-Current Tempco vs. R
TC
graph in
the Typical Operating Characteristics to program a cus-
tom tempco. From the graph, determine the appropriate
resistor and connect it between TCMIN and TC.
For example, if an LED requires a 5000ppm/°C tempco,
choose RTCof 8.3kΩ.
Program the Modulation Current
Determine the required modulation current at TA= +25°C.
Then select the appropriate value of R
MODSET
from the
Modulation Current vs. R
MODSET
graph in the Typical
Operating Characteristics.
For example, to program 75mA modulation current, the
graph indicates an R
MODSET
value of 750Ω for maximum tempco (12,000ppm/°C) and 1kΩ for nominal
tempco (3600ppm/°C). By interpolation, choose an
R
MODSET
of 792Ω for a tempco of 5000ppm/°C.
Program Prebias Voltage
Determine the LED prebias voltage that produces an
acceptable trade-off between peaking current and extinction ratio. See Table 1 for PB1, PB2, and PB3 settings.
Layout Considerations
For optimum performance, total load inductance should
not exceed 10nH. Load inductance includes LED
inductance, LED package lead inductance, and circuitboard traces. Keep the connections between the
MAX3967 OUT pins and the LED as short as possible
to minimize inductance.
Chip-and-wire (hybrid) technology reduces package
inductance significantly, and provides the best possible
performance.
Use good high-frequency layout techniques and a
multilayer board with an uninterrupted ground plane.
Power supplies should be capacitively bypassed to the
ground plane with surface-mount capacitors located
near the power-supply pins.
I
PEAK
LED PREBIAS
V-V
78
=
Ω
270Mbps SFP LED Driver
8 _______________________________________________________________________________________
Table 1. LED Prebias Voltage
PB1 PB2 PB3
PREBIAS (V)
Open Open Open 0.400
V
EE
Open Open 0.475
Open V
EE
Open 0.550
V
EE
V
EE
Open 0.625
Open Open V
EE
0.700
V
EE
Open V
EE
0.775
Open V
EE
V
EE
0.850
V
EE
V
EE
V
EE
0.925
Applications Information
Wire-Bonding Die
The MAX3967 utilizes gold metalization, which provides
high reliability. Make connections to the die with gold
wire only, using ball-bonding techniques. Use caution if
attempting wedge-bonding. Pad size is 4 mils x 4 mils
(100µm). Die thickness is typically 15 mils (375µm).
Exposed-Pad Package
The exposed pad on the 24-pin QFN provides a very
low thermal resistance path for heat removal from
the IC.
Chip Information
TRANSISTOR COUNT: 327
SUBSTRATE CONNECTED TO V
EE
PROCESS: BIPOLAR
DIE THICKNESS: 15 mils
MAX3967
270Mbps SFP LED Driver
_______________________________________________________________________________________ 9
Input Terminations
PECL
OUTPUT
IN+
V
CC
V
CC
V
CC
- 2V
50Ω
3.3 82 130
R1 R2
5.0 68 180
R1
R2
RF OR NON-PECL
OUTPUT
IN+
SINGLE-ENDED TERMINATION IS SHOWN. IN- SHOULD BE TERMINATED SIMILARLY.
MAX3967
MAX3967
Figure 3. Input Terminations
MAX3967
270Mbps SFP LED Driver
10 ______________________________________________________________________________________
MODSET
TCTCNOMTCMIN
TX_DISABLEDISABLE
PB3PB2PB1
INMON
IN+
FERRITE BEAD
MAX3967
10kΩ
V
EEOUT
C
IN
V
CCOUT
V
CC
R
MODSET
R
MON
OUT+
OUT-
V
EE
+3.3V
SFP TRANSMITTER WITH DIGITAL MONITOR
82Ω
+3.3V
120Ω
82Ω
+3.3V
120Ω
C
IN
DIAGNOSTIC
IC
DIFFERENTIAL
DATA
Typical Operating Circuits
10kΩ
+3.3V
+3.3V
SFP TRANSMITTER
+3.3V
V
TX_DISABLEDISABLE
CC
V
CCOUT
FERRITE BEAD
OUT-
DIFFERENTIAL
DATA
C
C
82Ω
IN
IN
120Ω
82Ω
MAX3967
IN+
IN-
PB3PB2PB1
120Ω
OUT+
V
EEOUT
V
EE
MODSET
TCTCNOMTCMIN
R
MODSET
MAX3967
270Mbps SFP LED Driver
______________________________________________________________________________________ 11
MODSET
TC
R
TC
*
TCNOMTCMIN
TX_DISABLE
*OPTIONAL COMPONENT
DISABLE
PECL
DATA
PB3PB2PB1
INMON
IN+
FERRITE BEAD
MAX3967
V
EEOUT
V
CCOUT
V
CC
R
MODSET
OUT+
OUT-
V
EE
V
CC
SFF TRANSMITTER WITH DISABLE
Typical Operating Circuits (continued)
MODSET
TCTCNOMTCMIN
TX_DISABLE
PECL
DATA
PB3PB2PB1
IN-
IN+
FERRITE BEAD
MAX3967
V
EEOUT
V
CCOUT
V
CC
R
MODSET
OUT+
OUT-
V
EE
V
CC
SFF TRANSMITTER WITHOUT DISABLE
MON
MAX3967
270Mbps SFP LED Driver
12 ______________________________________________________________________________________
1
2
3
4
5
6
7
8
9
10
11 12
13
14
15
16
17
1819202122
1
2
3
4
5
6
7
8
9
10
11 12
13
14
15
16
17
1819202122
TCMIN
TCNOM
TC
PB1
PB2
PB3
OUT+ OUT+ OUT- OUT-
MON
MODSET
IN-IN+
TX_DISABLE
1.17mm
(46.1 mils)
(0, 0)
1.83mm
(72.0 mils)
V
CC
V
CC
V
CCOUT
V
EEOUT
V
EEOUT
V
CCOUT
V
EE
Chip Topography
Pad Coordinates
COORDINATES (µm)
PAD
NUMBER
XY
BP1 TCMIN 0 1464
BP2 TCNOM 0 1268
BP3 TC 0 1060
BP4 PB1 0 876
BP5 PB2 0 744
BP6 PB3 0 560
BP7 V
EEOUT
0 116
BP8 V
EEOUT
00
BP9 OUT+ 180 0
BP10 OUT+ 296 0
BP11 OUT- 480 0
BP12 OUT- 596 0
BP13 V
CCOUT
804 0
BP14 V
CCOUT
804 124
BP15 V
CC
804 528
BP16 MON 804 1032
BP17 MODSET 804 1240
BP18 V
CC
804 1464
BP19 IN- 624 1464
BP20 IN+ 492 1464
BP21
308 1464
BP22 V
EE
176 1464
PAD NAME
TX_DISABLE
MAX3967
270Mbps SFP LED Driver
______________________________________________________________________________________ 13
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages
.)
24L QFN THIN.EPS
C
1
2
21-0139
PACKAGE OUTLINE
12, 16, 20, 24L THIN QFN, 4x4x0.8mm
PART PACKAGE TYPE
PACKAGE
CODE
MAX3967ETG
24 thin QFN
T2444-4
(4mm x 4mm x 0.8mm)
MAX3967
270Mbps SFP LED Driver
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
14 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
Package Information(continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages
.)
C
2
2
21-0139
PACKAGE OUTLINE
12, 16, 20, 24L THIN QFN, 4x4x0.8mm
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