Maxim MAX9370 Lvttl/ttl-to-differential lvpecl/pecl translator Datasheet

19-2377; Rev 0; 4/02
LVTTL/TTL-to-Differential LVPECL/PECL
Translators
The MAX9370/MAX9371/MAX9372 LVTTL/TTL-to-differential LVPECL/PECL translators are designed for highspeed communication signal and clock driver
applications. The MAX9370/MAX9372 are dual
LVTTL/TTL-to-LVPECL/PECL translators that operate in
excess of 1GHz. The MAX9371 is a single translator.
The MAX9370/MAX9371 operate over a wide 3.0V to
5.25V supply range, allowing high-performance clock
or data distribution in systems with a nominal 3.3V or
5.0V supply. The MAX9372 is designed to operate from
3.0V to 3.6V.
The devices default to output high if the input is disconnected. They feature low 270ps propagation delay. The
MAX9370/MAX9371/MAX9372 employ industry-standard flow-through pinouts. These devices are specified
for operation from -40°C to +85°C, and are offered in
space-saving, 8-pin SOT23, µMAX, and SO packages.
Features
♦ Guaranteed 1GHz Operating Frequency at 600mV
Differential Output
♦ 270ps Propagation Delay
♦ 10ps Output-to-Output Skew (MAX9370/MAX9372)
♦ Wide Supply Range: 3.0V to 5.25V
(MAX9370/MAX9371)
♦ ESD Protection > 2kV (Human Body Model)
♦ Output High with Input Open
♦ Available in Small 8-Pin SOT23, µMAX, and SO
Packages
♦ Improved Upgrades to MC100EL22, MC100EPT20,
MC100EPT22
Ordering Information
TEMP RANGE
PIN-PACKAGE
MAX9370EKA-T*
PART
-40°C to +85°C
8 SOT23-8
MAX9370EUA*
-40°C to +85°C
8 µMAX
MAX9370ESA
-40°C to +85°C
8 SO
MAX9371EKA-T*
-40°C to +85°C
8 SOT23-8
MAX9371EUA*
-40°C to +85°C
8 µMAX
Base Station
MAX9371ESA
-40°C to +85°C
8 SO
Mass Storage
MAX9372EKA-T*
-40°C to +85°C
8 SOT23-8
MAX9372EUA*
-40°C to +85°C
8 µMAX
Applications
Precision Clock/Data Level Translation
Central Office Clock Distribution
DSLAM/DLC
Pin Configurations/Functional Diagrams appears at end of
data sheet.
MAX9372ESA
-40°C to +85°C
8 SO
*Future product—contact factory for availability.
Typical Operating Circuit
MAX9370
MAX9371
MAX9372
PECL/LVPECL
RECEIVER
Z0 = 50Ω
Q_
TTL/LVTTL
INPUT
D
Q_
Z0 = 50Ω 50Ω
50Ω
VCC - 2.0V
________________________________________________________________ Maxim Integrated Products
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.
1
MAX9370/MAX9371/MAX9372
General Description
MAX9370/MAX9371/MAX9372
LVTTL/TTL-to-Differential LVPECL/PECL
Translators
ABSOLUTE MAXIMUM RATINGS
VCC to GND (MAX9370/MAX9371) .......................-0.3V to +5.5V
VCC to GND (MAX9372) ........................................-0.3V to +4.0V
D_ to GND ..................................................-0.3V to (VCC + 0.3V)
Q_, Q_ to GND ...........................................-0.3V to (VCC + 0.3V)
Continuous Output Current ................................................50mA
Surge Output Current........................................................100mA
Junction-to-Ambient Thermal Resistance in Still Air
8-Pin SOT23..............................................................+112°C/W
8-Pin µMAX…............................................................+221°C/W
8-Pin SO....................................................................+170°C/W
Junction-to-Ambient Thermal Resistance with
500LFPM Airflow
8-Pin SOT23................................................................+78°C/W
8-Pin µMAX…............................................................+155°C/W
8-Pin SO......................................................................+99°C/W
Junction-to-Case Thermal Resistance
8-Pin SOT23................................................................+80°C/W
8-Pin µMAX…..............................................................+39°C/W
8-Pin SO......................................................................+40°C/W
Continuous Power Dissipation (TA = +70°C)
8-Pin SO (derate 5.9mW/°C above +70°C)...................470mW
8-Pin µMAX (derate 4.5mW/°C above +70°C) ..............362mW
8-Pin SOT23 (derate 8.9mW/°C above +70°C).............714mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature .....................................................+150°C
Storage Temperature Range .............................-60°C to +150°C
Soldering Temperature (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
(VCC = 3.0V to 5.25V for MAX9370/MAX9371, VCC = 3.0V to 3.6V for MAX9372, outputs terminated with 50Ω ±1% to VCC - 2.0V.
Typical values are at VCC = 3.3V, VIH = 2.4V, VIL = 0.4V, unless otherwise noted.) (Notes 1, 2, 3)
PARAMETER
SYMBOL
CONDITIONS
-40°C
MIN
TYP
+25°C
MAX
MIN
TYP
+85°C
MAX
MIN
TYP
MAX
UNITS
LVTTL INPUTS (D_)
Input High
Voltage
VIH
Input Low
Voltage
VIL
Input Low
Current
IIL
2.0
VD = 0.5V
VD = 2.7V
Input High
Current
IIH
Input Clamp
Voltage
-50
2.0
2.0
V
0.8
0.8
0.8
V
-100
-100
-100
µA
+10
-50
+10
-50
+10
VD = VCC,
MAX9370/
MAX9371
130
130
130
VD = VCC,
MAX9372
20
20
20
IIL or IIH = 18mA
-1.2
-1.2
-1.2
µA
V
LVPECL/PECL OUTPUTS (Q_, Q_)
Output High
Voltage
Output Low
Voltage
2
VOH
VOL
MAX9370
VCC 1.085
VCC 0.895
VCC 1.025
VCC 0.895
VCC 1.025
VCC 0.895
MAX9371/
MAX9372
VCC 1.145
VCC 0.895
VCC 1.145
VCC 0.895
VCC 1.145
VCC 0.895
MAX9370
VCC 1.83
VCC 1.62
VCC 1.81
VCC 1.62
VCC 1.81
VCC 1.62
MAX9371/
MAX9372
VCC 1.945
VCC 1.695
VCC 1.945
VCC -1.695
VCC 1.945
VCC 1.695
_______________________________________________________________________________________
V
V
LVTTL/TTL-to-Differential LVPECL/PECL
Translators
(VCC = 3.0V to 5.25V for MAX9370/MAX9371, VCC = 3.0V to 3.6V for MAX9372, outputs terminated with 50Ω ±1% to VCC - 2.0V.
Typical values are at VCC = 3.3V, VIH = 2.4V, VIL = 0.4V, unless otherwise noted.) (Notes 1, 2, 3)
PARAMETER
SYMBOL
CONDITIONS
Differential
Output Swing
(VOH - VOL)
-40°C
MIN
TYP
+25°C
MAX
600
MIN
TYP
+85°C
MAX
600
MIN
TYP
MAX
600
UNITS
mV
SUPPLY CURRENT
Power-Supply
Current
(Note 4)
ICC
MAX9370/
MAX9372
18
28
20
28
22
28
MAX9371
9.5
16
10.5
16
11.5
16
mA
AC ELECTRICAL CHARACTERISTICS
(VCC = 3.0V to 5.25V for MAX9370/MAX9371, VCC = 3.0V to 3.6V for MAX9372, outputs terminated with 50Ω ±1% to VCC - 2.0V, input
frequency ≤ 1.0GHz, input transition time = 125ps (20% to 80%), VIH = 2.0V, VIL = 0.8V. Typical values are at VCC = 3.3V, VIH =
2.4V, VIL = 0.4V, unless otherwise noted.) (Note 5)
PARAMETER
SYMBOL
CONDITIONS
-40°C
MIN
TYP
+25°C
MAX
Maximum
Toggle
Frequency
fMAX
VOH - VOL ≥
600mV
1.0
1.5
Input-toOutput
Propagation
Delay
tPLH,
tPHL
Figure 1
200
270
400
Output-toOutput Skew
tSKQQ
MAX9370/
MAX9372
(Note 6)
10
50
Output Rise/
Fall Time
tR, tF
Figure 1
Added
Deterministic
Jitter
tDJ
1Gbps 223 - 1
PRBS pattern
(Note 7)
Added
Random Jitter
tRJ
1GHz clock
(Note 7)
80
250
+85°C
MIN
TYP
1.0
1.5
200
270
400
7
50
80
MAX
250
TYP
1.0
1.5
200
270
400
ps
7
50
ps
250
ps
80
MAX
UNITS
MIN
GHz
40
60
40
60
40
60
ps(P-P)
0.23
0.8
0.23
0.8
0.23
0.8
ps(RMS)
Note 1: Measurements are made with the device in thermal equilibrium.
Note 2: Current into a pin is defined as positive. Current out of a pin is defined as negative.
Note 3: DC parameters are production tested at TA = +25°C. DC limits are guaranteed by design and characterization over the full
operating temperature range.
Note 4: All pins are open except VCC and GND.
Note 5: Guaranteed by design and characterization. Limits are set to ±6 sigma.
Note 6: Measured between outputs of the same part at the signal crossing points under identical conditions for a same-edge transition.
Note 7: Device jitter added to the input signal.
_______________________________________________________________________________________
3
MAX9370/MAX9371/MAX9372
DC ELECTRICAL CHARACTERISTICS (continued)
Typical Operating Characteristics
(MAX9371, VCC = 3.3V, VIH = 2.4V, VIL = 0.4V, outputs terminated with 50Ω to VCC - 2V, input transition time = 125ps (20% to 80%),
TA = +25°C, unless otherwise noted.)
DIFFERENTIAL OUTPUT VOLTAGE
(VOH - VOL) vs. FREQUENCY
MAX9370/MAX9372
18
14
MAX9371
10
600
400
-40
-15
10
35
60
FALLING EDGE
RISING EDGE
220
180
0
85
240
200
200
0
6
0.4
0.8
1.2
1.6
2.0
-40
FREQUENCY (GHz)
TEMPERATURE (°C)
-15
10
PROPAGATION DELAY vs. TEMPERATURE
PROPAGATION DELAY (ps)
MAX9370 toc04
290
280
270
260
250
240
-40
-15
10
35
35
TEMPERATURE (°C)
300
60
85
TEMPERATURE (°C)
4
MAX9370 toc03
800
f = 100MHz
TRANSITION TIME (ps)
22
TRANSITION TIME vs. TEMPERATURE
260
MAX9370 toc02
ALL INPUTS AND OUTPUTS ARE OPEN
1000
DIFFERENTIAL OUTPUT VOLTAGE (mV)
26
MAX9370 toc01
SUPPLY CURRENT vs. TEMPERATURE
SUPPLY CURRENT (mA)
MAX9370/MAX9371/MAX9372
LVTTL/TTL-to-Differential LVPECL/PECL
Translators
_______________________________________________________________________________________
60
85
LVTTL/TTL-to-Differential LVPECL/PECL
Translators
PIN
NAME
FUNCTION
SO
µMAX
SOT23
1
8
Q0
2
7
Q0
Inverting Differential LVPECL/PECL Output 0. Typically terminate with 50Ω resistor to VCC - 2V.
3
6
Q1
Noninverting Differential LVPECL/PECL Output 1. Typically terminate with 50Ω resistor to VCC - 2V.
4
5
Q1
Inverting Differential LVPECL/PECL Output 1. Typically terminate with 50Ω resistor to VCC - 2V.
5
2
GND
6
4
D1
LVTTL/TTL Input 1. LVTTL/TTL input for translator corresponding to output Q1 and Q1.
7
3
D0
LVTTL/TTL Input 0. LVTTL/TTL input for translator corresponding to output Q0 and Q0.
8
1
VCC
Positive Supply Voltage. Bypass VCC to GND with 0.1µF and 0.01µF ceramic capacitors. Place the
capacitors as close to the device as possible with the smaller value capacitor closest to the device.
Noninverting Differential LVPECL/PECL Output 0. Typically terminate with 50Ω resistor to VCC - 2V.
Ground. Provide a low-impedance connection to ground plane.
Pin Description for the MAX9371
PIN
FUNCTION
NAME
SO
µMAX
SOT23
1, 4, 6
4, 5, 8
N.C.
2
7
Q
Noninverting Differential LVPECL/PECL Output. Typically terminate with 50Ω resistor to VCC - 2V.
3
6
Q
Inverting Differential LVPECL/PECL Output. Typically terminate with 50Ω resistor to VCC - 2V.
5
2
GND
7
3
D
8
1
VCC
No Connection. No internal connection.
Ground. Provide a low-impedance connection to ground plane.
LVTTL/TTL Input
Positive Supply Voltage. Bypass VCC to GND with 0.1µF and 0.01µF ceramic capacitors. Place the
capacitors as close to the device as possible with the smaller value capacitor closest to the device.
Detailed Description
The MAX9370/MAX9371/MAX9372 LVTTL/TTL-to-differential LVPECL/PECL translators are designed for highspeed communication signal and clock driver
applications. The MAX9370/MAX9372 are dual LVTTLto-LVPECL/PECL translators that operate in excess of
1GHz. The MAX9371 is a single translator. The
MAX9370/MAX9371 operate over a wide 3.0V to 5.25V
supply range, allowing high-performance clock or data
distribution in systems with a nominal 3.3V or 5.0V supply. The MAX9372 is optimized for 3.0V to 3.6V operation. These devices feature low 270ps propagation
delay and 40ps peak-to-peak deterministic jitter.
Inputs and Outputs
The MAX9370/MAX9371/MAX9372 inputs accept standard LVTTL/TTL levels. The input has pullup circuitry that
drives the outputs to a differential high if the inputs are
open. The outputs are differential LVPECL/PECL levels.
Applications Information
Output Termination
Terminate outputs with 50Ω to VCC - 2V or use an equivalent Thevenin termination. Use the same terminate on
each output for the lowest output-to-output skew. When a
single-ended signal is taken from a differential output,
terminate both outputs. For example, if Q is used as a
single-ended output, terminate both Q and Q.
_______________________________________________________________________________________
5
MAX9370/MAX9371/MAX9372
Pin Description for the MAX9370/MAX9372
MAX9370/MAX9371/MAX9372
LVTTL/TTL-to-Differential LVPECL/PECL
Translators
Ensure that the output currents do not exceed the continuous safe output current limit or surge output current
limit as specified in the Absolute Maximum Ratings
table. Under all operating conditions, the device’s total
thermal limits should be observed.
Supply Bypassing
Bypass VCC to GND with high-frequency surface-mount
ceramic 0.1µF and 0.01µF capacitors in parallel and as
close to the device as possible, with the 0.01µF capacitor closest to the device. Use multiple parallel vias to
minimize parasitic inductance.
PC Board Traces
Input and output trace characteristics affect the performance of the MAX9370/MAX9371/MAX9372. Connect
each differential output to a 50Ω characteristic impedance
trace. Minimize the number of vias to prevent impedance
discontinuities. Reduce reflections by maintaining the 50Ω
characteristic impedance through connectors and across
cables. Reduce skew within a differential pair by matching the electrical length of the traces.
Chip Information
TRANSISTOR COUNT: 358
PROCESS: Bipolar
VIH
50%
50%
D_
VIL
tPLH
tPHL
VOH
Q_
VOH - VOL
VOL
Q_
80%
VOH - VOL
80%
0V (DIFFERENTIAL)
VOH - VOL
20%
20%
Q_ - Q_
tR
tF
Figure 1. Input-to-Output Propagation Delay and Transition Timing Diagram
6
_______________________________________________________________________________________
LVTTL/TTL-to-Differential LVPECL/PECL
Translators
N.C.
1
8
VCC
VCC
1
Q
2
7
D
GND
Q
3
6
N.C.
N.C.
4
5
GND
MAX9371
8
N.C.
2
7
Q
D
3
6
Q
N.C.
4
5
N.C.
SO/µMAX
MAX9371
SOT23
MAX9370/MAX9372
MAX9370/MAX9372
Q0
1
8
VCC
VCC
1
8
Q0
Q0
2
7
D0
GND
2
7
Q0
Q1
3
6
D1
D0
3
6
Q1
Q1
4
5
GND
D1
4
5
Q1
SO/µMAX
SOT23
_______________________________________________________________________________________
7
MAX9370/MAX9371/MAX9372
Pin Configurations/Functional Diagrams
Package Information
SOT23, 8L.EPS
(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.)
4X S
8
E
ÿ 0.50±0.1
8
INCHES
DIM
A
A1
A2
b
H
c
D
e
E
H
0.6±0.1
1
L
1
α
0.6±0.1
S
BOTTOM VIEW
D
MIN
0.002
0.030
MAX
0.043
0.006
0.037
0.010
0.014
0.005
0.007
0.116
0.120
0.0256 BSC
0.116
0.120
0.188
0.198
0.016
0.026
6∞
0∞
0.0207 BSC
8LUMAXD.EPS
MAX9370/MAX9371/MAX9372
LVTTL/TTL-to-Differential LVPECL/PECL
Translators
MILLIMETERS
MAX
MIN
0.05
0.75
1.10
0.15
0.95
0.25
0.36
0.13
0.18
2.95
3.05
0.65 BSC
2.95
3.05
4.78
5.03
0.41
0.66
0∞
6∞
0.5250 BSC
TOP VIEW
A1
A2
e
FRONT VIEW
A
α
c
b
L
SIDE VIEW
PROPRIETARY INFORMATION
TITLE:
PACKAGE OUTLINE, 8L uMAX/uSOP
APPROVAL
DOCUMENT CONTROL NO.
21-0036
8
REV.
J
1
1
_______________________________________________________________________________________
LVTTL/TTL-to-Differential LVPECL/PECL
Translators
9LUCSP, 3x3.EPS
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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 9
© 2002 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
MAX9370/MAX9371/MAX9372
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.)
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