General Description
The MAX9392/MAX9393 dual 2 x 2 crosspoint switches
perform high-speed, low-power, and low-noise signal
distribution. The MAX9392/MAX9393 multiplex one of two
differential input pairs to either or both low-voltage differ-
ential signaling (LVDS) outputs for each channel.
Independent enable inputs turn on or turn off each differ-
ential output pair.
Four LVCMOS/LVTTL logic inputs (two per channel) con-
trol the internal connections between inputs and outputs.
This flexibility allows for the following configurations: 2 x 2
crosspoint switch, 2:1 mux, 1:2 splitter, or dual repeater.
This makes the MAX9392/MAX9393 ideal for protection
switching in fault-tolerant systems, loopback switching for
diagnostics, fanout buffering for clock/data distribution,
and signal regeneration.
Fail-safe circuitry forces the outputs to a differential low
condition for undriven inputs or when the common-
mode voltage exceeds the specified range. The
MAX9392 provides high-level input fail-safe detection
for LVDS, HSTL, and other GND-referenced differential
inputs. The MAX9393 provides low-level input fail-safe
detection for LVPECL, CML, and other V
CC
-referenced
differential inputs.
Ultra-low 98ps
(
P-P)
(max) pseudorandom bit sequence
(PRBS) jitter ensures reliable communications in high-
speed links that are highly sensitive to timing error,
especially those incorporating clock-and-data recovery,
or serializers and deserializers. The high-speed switch-
ing performance guarantees 1.5GHz operation and less
than 67ps (max) skew between channels.
LVDS inputs and outputs are compatible with the
TIA/EIA-644 LVDS standard. The LVDS outputs drive
100
loads. The MAX9392/MAX9393 are offered in
5mm x 5mm thin QFN with exposed paddle and 32-pin
TQFP packages and operate over the extended tem-
perature range (-40C to +85C).
Also see the MAX9390/MAX9391 for the crossflow version.
Applications
High-Speed Telecom/Datacom Equipment
Central-Office Backplane Clock Distribution
DSLAM
Protection Switching
Fault-Tolerant Systems
Features
o 1.5GHz Operation with 250mV Differential Output
Swing
o 2ps
RMS
(max) Random Jitter
o AC Specifications Guaranteed for 150mV
Differential Input
o Signal Inputs Accept Any Differential Signaling
Standard
o LVDS Outputs for Clock or High-Speed Data
o High-Level Input Fail-Safe Detection (MAX9392)
o Low-Level Input Fail-Safe Detection (MAX9393)
o +3.0V to +3.6V Supply Voltage Range
o LVCMOS/LVTTL Logic Inputs Control Signal
Routing
MAX9392/MAX9393
Anything-to-LVDS Dual 2 x 2
Crosspoint Switches
________________________________________________________________ Maxim Integrated Products
1
TOP VIEW
MAX9392
MAX9393
TQFP
32
28
29
30
31
25
26
27
INA1
INA1
V
CC
ASEL0
ASEL1
INA0
INA0
GND
10
13
15
14
16
11
12
9
ENB1
OUTB1
OUTB1
GND
ENB0
OUTB0
OUTB0
V
CC
17
18
19
20
21
22
23 OUTA0
24 V
CC
OUTA0
ENA0
GND
OUTA1
OUTA1
ENA1
2
3
4
5
6
7
8
BSEL1
INB1
INB1
BSEL0
INB0
INB0
1
GND
V
CC
PART
TEMP RANGE
PIN-PACKAGE
MAX9392EHJ
-40C to +85C
32 TQFP
MAX9392ETJ*
-40C to +85C
32 Thin QFN
MAX9393EHJ
-40C to +85C
32 TQFP
MAX9393ETJ*
-40C to +85C
32 Thin QFN
Pin Configurations
Ordering Information
19-2913; Rev 0; 8/03
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.
*Future product--contact factory for availability.
Pin Configurations continued at end of data sheet.
Functional Diagram and Typical Operating Circuit appear at
end of data sheet.
MAX9392/MAX9393
Anything-to-LVDS Dual 2 x 2
Crosspoint Switches
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(V
CC
= +3.0V to +3.6V, R
L
= 100
1%, EN_ _ = V
CC
, V
CM
= 0.05V to (V
CC
- 0.6V) (MAX9392), V
CM
= 0.6V to (V
CC
- 0.05V)
(MAX9393), T
A
= -40C to +85C, unless otherwise noted. Typical values are at V
CC
= +3.3V, |V
ID
| = 0.2V, V
CM
= +1.2V, T
A
= +25C,
unless otherwise noted.) (Notes 1, 2, and 3)
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.
V
CC
to GND ...........................................................-0.3V to +4.1V
IN_ _, IN_ _, OUT_ _, OUT_ _, EN_ _,
_SEL_ to GND..........................................-0.3V to (V
CC
+ 0.3V)
IN_ _ to IN_ _ ..........................................................................
3V
Short-Circuit Duration (OUT_ _, OUT_ _) ...................Continuous
Continuous Power Dissipation (T
A
= +70C)
32-Pin TQFP (derate 13.1mW/C
above +70C).............................................................1047mW
32-Pin 5mm x 5mm Thin QFN (derate 21.3mW/C
above +70C).............................................................1702mW
Junction-to-Ambient Thermal Resistance in Still Air
32-Pin TQFP............................................................+76.4C/W
32-Pin 5mm x 5mm Thin QFN....................................+47C/W
Junction-to-Case Thermal Resistance
32-Pin 5mm x 5mm Thin QFN......................................+2C/W
Operating Temperature Range ...........................-40C to +85C
Junction Temperature ......................................................+150C
Storage Temperature Range .............................-65C to +150C
Soldering Temperature (10s) ...........................................+300C
PARAMETER
SYM B O L CONDITIONS
MIN
TYP
MAX
UNITS
LVCMOS/LVTTL INPUTS (EN_ _, _SEL_)
Input High Voltage
V
IH
2.0
V
CC
V
Input Low Voltage
V
IL
0
0.8
V
Input High Current
I
IH
V
IN
= +2.0V to V
CC
0
20
A
Input Low Current
I
IL
V
IN
= 0 to +0.8V
0
10
A
DIFFERENTIAL INPUTS (IN_ _,
I
I
I
IN
N
N
N__
_
_ __
_
_)
Differential Input Voltage
V
ID
V
ILD
>
0 and V
IHD
<
V
CC
, Figure 1
0.1
3.0
V
MAX9392
0.05
V
CC
- 0.6
Input Common-Mode Range
V
CM
MAX9393
0.6
V
CC
- 0.05
V
MAX9392
|V
ID
|
< 3.0V
-50
+10
Input Current
I
IN_ _
,
I
IN_ _
MAX9393
|V
ID
|
< 3.0V
-10
+90
A
LVDS OUTPUTS (OUT_ _,
O
O
O
OU
U
U
UT
T
T
T__
_
_ __
_
_)
Differential Output Voltage
V
OD
R
L
= 100
, Figure 2
250
350
450
mV
Change in Magnitude of V
OD
Between Complementary Output
States
V
OD
Figure 2
1.0
50
mV
Offset Common-Mode Voltage
V
OS
Figure 2
1.125
1.25
1.375
V
Change in Magnitude of V
OS
Between Complementary Output
States
V
OS
Figure 2
1.0
50
mV
MAX9392/MAX9393
Anything-to-LVDS Dual 2 x 2
Crosspoint Switches
_______________________________________________________________________________________
3
AC ELECTRICAL CHARACTERISTICS
(V
CC
= +3.0V to +3.6V, f
IN
< 1.34GHz, t
R_IN
= t
F_IN
= 125ps, R
L
= 100
1%, |V
ID
| > 150mV, V
CM
= +0.075V to (V
CC
- 0.6V)
(MAX9392 only), V
CM
= +0.6V to (V
CC
- 0.075V) (MAX9393 only), EN_ _ = V
CC
, T
A
= -40C to +85C, unless otherwise noted. Typical
values are at V
CC
= +3.3V, |V
ID
| = 0.2V, V
CM
= +1.2V, f
IN
= 1.34GHz, T
A
= +25C, unless otherwise noted.) (Note 5)
Note 1: Measurements obtained with the device in thermal equilibrium. All voltages referenced to GND except V
ID
, V
OD
, and
V
OD
.
Note 2: Current into the device defined as positive. Current out of the device defined as negative.
Note 3: DC parameters tested at T
A
= +25C and guaranteed by design and characterization for T
A
= -40C to +85C.
Note 4: Current through either output.
Note 5: Guaranteed by design and characterization. Limits set at
6 sigma.
Note 6: t
SKEW
is the magnitude difference of differential propagation delays for the same output over same conditions. t
SKEW
=
|t
PHL
- t
PLH
|.
Note 7: Measured between outputs of the same device at the signal crossing points for a same-edge transition, under the same
conditions.
Note 8: Device jitter added to the differential input signal.
DC ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3.0V to +3.6V, R
L
= 100
1%, EN_ _ = V
CC
, V
CM
= 0.05V to (V
CC
- 0.6V) (MAX9392), V
CM
= 0.6V to (V
CC
- 0.05V)
(MAX9393), T
A
= -40C to +85C, unless otherwise noted. Typical values are at V
CC
= +3.3V, |V
ID
| = 0.2V, V
CM
= +1.2V, T
A
= +25C,
unless otherwise noted.) (Notes 1, 2, and 3)
PARAMETER
SYM B O L CONDITIONS
MIN
TYP
MAX
UNITS
V
OUT_ _
or V
OUT_ _
= 0
30
40
Output Short-Circuit Current
(Either Output Shorted to GND)
|I
OS
|
V
ID
=
100m V
( N ote 4)
V
OUT_ _
= V
OUT_ _
= 0
18
24
mA
Output Short-Circuit Current
(Outputs Shorted Together)
|I
OSB
|
V
ID
=
100mV, V
OUT_ _
= V
OUT_ _
(Note 4)
5.0
12
mA
SUPPLY CURRENT
Supply Current
I
CC
R
L
= 100
, EN_ _ = V
CC
68
98
mA
PARAMETER
SYM B O L CONDITIONS
MIN
TYP
MAX
UNITS
_SEL_ to Switched Output
t
SWITCH
Figure 3
1.1
ns
Disable Time to Differential
Output Low
t
PHD
Figure 4
1.7
ns
Enable Time to Differential
Output High
t
PDH
Figure 4
1.7
ns
Switching Frequency
f
MAX
V
OD
>
250mV
1.5
2.2
GHz
Low-to-High Propagation Delay
t
PLH
Figures 1, 5
294
410
574
ps
High-to-Low Propagation Delay
t
PHL
Figures 1, 5
286
402
555
ps
Pulse Skew |t
PLH
- t
PHL
|
t
SKEW
Figures 1, 5 (Note 6)
17
104
ps
Output-to-Output Skew
t
CCS
Figures 5, 6 (Note 7)
4
67
ps
Output Low-to-High Transition
Time (20% to 80%)
t
R
Figures 1, 5; f
IN
= 100MHz
112
142
185
ps
Output High-to-Low Transition
Time (80% to 20%)
t
F
Figures 1, 5; f
IN
= 100MHz
112
145
185
ps
Added Random Jitter
t
RJ
f
IN_ _
= 1.34GHz, clock pattern (Note 8)
2
ps
RMS
Added Deterministic Jitter
t
DJ
1.34Gbps, 2
23
- 1 PRBS (Note 8)
60
98
ps
P-P
MAX9392/MAX9393
Anything-to-LVDS Dual 2 x 2
Crosspoint Switches
4
_______________________________________________________________________________________
Typical Operating Characteristics
(V
CC
= +3.3V, |V
ID
| = 0.2V, V
CM
= +1.2V, f
IN
= 1.34GHz, T
A
= +25C, unless otherwise noted.)
SUPPLY CURRENT
vs. TEMPERATURE
MAX9392 toc01
TEMPERATURE (
C)
SUPPLY CURRENT (mA)
60
35
10
-15
55
60
65
70
75
80
50
-40
85
V
CC
= +3.6V
V
CC
= +3.0V
V
CC
= +3.3V
0
150
100
50
200
250
350
300
400
0
0.4 0.6
0.2
0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4
OUTPUT AMPLITUDE vs. FREQUENCY
MAX9392 toc02
FREQUENCY (GHz)
OUTPUT AMPLITUDE (mV)
OUTPUT RISE AND FALL TIMES
vs. TEMPERATURE
MAX9392 toc03
TEMPERATURE (
C)
RISE/FALL TIME (ps)
60
35
10
-15
130
140
150
160
170
180
120
-40
85
f
IN
= 100MHz
t
F
t
R
350
380
370
360
390
400
410
420
430
440
450
-40
10
-15
35
60
85
PROPAGATION DELAY
vs. TEMPERATURE
MAX9392 toc04
TEMPERATURE (
C)
PROPAGATION DELAY (ps)
MAX9392
DIFFERENTIAL INPUT CURRENT
vs. TEMPERATURE
MAX9392 toc05
TEMPERATURE (
C)
INPUT CURRENT (
A)
60
35
10
-15
-45
-40
-35
-30
-25
-20
-15
-10
-5
0
5
10
-50
-40
85
V
IN
= 3.0V
V
IN
= 0.1V
MAX9393
DIFFERENTIAL INPUT CURRENT
vs. TEMPERATURE
MAX9392 toc06
TEMPERATURE (
C)
INPUT CURRENT (
A)
60
35
10
-15
10
20
30
40
50
60
70
0
-40
85
V
IN
= 3.2V
V
IN
= 0.3V
MAX9392
INPUT CURRENT vs. V
IHD
MAX9392 toc07
V
IHD
(V)
INPUT CURRENT (
A)
3.3
3.0
2.4 2.7
0.6 0.9 1.2 1.5 1.8 2.1
0.3
-45
-40
-35
-30
-25
-20
-15
-10
-5
0
5
10
-50
0
3.6
V
CC
= +3V
IN_ _ OR IN_ _ = GND
V
CC
= +3.6V
MAX9393
INPUT CURRENT vs. V
ILD
MAX9392 toc08
V
ILD
(V)
INPUT CURRENT (
A)
3.3
3.0
2.4 2.7
0.6 0.9 1.2 1.5 1.8 2.1
0.3
0
10
20
30
40
50
60
70
80
-10
0
3.6
V
CC
= +3V
V
CC
= +3.6V
IN_ _ OR IN_ _ = V
CC
MAX9392/MAX9393
Anything-to-LVDS Dual 2 x 2
Crosspoint Switches
_______________________________________________________________________________________
5
PIN
NAME
FUNCTION
1, 12,
20, 25
GND
Ground
2
INB0
LVDS/HSTL (MAX9392) or LVPECL/CML (MAX9393) Noninverting Input. An internal 128k
resistor to V
CC
pulls
the input high when unconnected (MAX9392). An internal 68k
resistor to GND pulls the input low when
unconnected (MAX9393).
3
INB0
LVDS/HSTL (MAX9392) or LVPECL/CML (MAX9393) Inverting Input. An internal 128k
resistor to V
CC
pulls the
input high when unconnected (MAX9392). An internal 68k
resistor to GND pulls the input low when
unconnected (MAX9393).
4
BSEL0
Input Select for B0 Output. Selects the differential input to reproduce at the B0 differential outputs. Connect
BSEL0 to GND or leave open to select the INB0 (
INB0) set of inputs. Connect BSEL0 to V
CC
to select the INB1
(
INB1) set of inputs. An internal 435k
resistor pulls BSEL0 low when unconnected.
5, 16,
24, 29
V
CC
Power-Supply Input. Bypass each V
CC
to GND with 0.1F and 0.01F ceramic capacitors. Install both bypass
capacitors as close to the device as possible, with the 0.01F capacitor closest to the device.
6
INB1
LVDS/HSTL (MAX9392) or LVPECL/CML (MAX9393) Noninverting Input. An internal 128k
resistor to V
CC
pulls
the input high when unconnected (MAX9392). An internal 68k
resistor to GND pulls the input low when
unconnected (MAX9393).
7
INB1
LVDS/HSTL (MAX9392) or LVPECL/CML (MAX9393) Inverting Input. An internal 128k
resistor to V
CC
pulls the
input high when unconnected (MAX9392). An internal 68k
resistor to GND pulls the input low when
unconnected (MAX9393).
8
BSEL1
Input Select for B1 Output. Selects the differential input to reproduce at the B1 differential outputs. Connect
BSEL1 to GND or leave open to select the INB0 (
INB0) set of inputs. Connect BSEL1 to V
CC
to select the INB1
(
INB1) set of inputs. An internal 435k
resistor pulls BSEL1 low when unconnected.
9
ENB1
B1 Output Enable. Drive ENB1 high to enable the B1 LVDS outputs. An internal 435k
resistor pulls ENB1 low
when unconnected.
10
OUTB1
B1 LVDS Inverting Output. Connect a 100
termination resistor between OUTB1 and OUTB1 at the receiver
inputs to ensure proper operation.
11
OUTB1
B1 LVDS Noninverting Output. Connect a 100
termination resistor between OUTB1 and OUTB1 at the receiver
inputs to ensure proper operation.
13
ENB0
B0 Output Enable. Drive ENB0 high to enable the B0 LVDS outputs. An internal 435k
resistor pulls ENB0 low
when unconnected.
14
OUTB0
B0 LVDS Inverting Output. Connect a 100
termination resistor between OUTB0 and OUTB0 at the receiver
inputs to ensure proper operation.
15
OUTB0
B0 LVDS Noninverting Output. Connect a 100
termination resistor between OUTB0 and OUTB0 at the receiver
inputs to ensure proper operation.
Pin Description
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