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PDF MAX3294 Data sheet ( Hoja de datos )
| Número de pieza | MAX3294 | |
| Descripción | SOT23 RS-485 / RS-422 Transmitters | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MAX3294 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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MAX3293–MAX3295
20Mbps, +3.3V, SOT23 RS-485/
RS-422 Transmitters
General Description
The MAX3293/MAX3294/MAX3295 low-power, high-
speed transmitters for RS-485/RS-422 commu-
nication operate from a single +3.3V power supply.
These devices contain one differential transmitter.
The MAX3295 transmitter operates at data rates up
to 20Mbps, with an output skew of less than 5ns, and
a guaranteed driver propagation delay below 25ns.
The MAX3293 (250kbps) and MAX3294 (2.5Mbps) are
slew-rate limited to minimize EMI and reduce reflections
caused by improperly terminated cables.
The MAX3293/MAX3294/MAX3295 output level is guar-
anteed at +1.5V with a standard 54Ω load, compliant
with RS-485 specifications. The transmitter draws 5mA
of supply current when unloaded, and 1µA in low-power
shutdown mode (DE = GND).
Hot-swap circuitry eliminates false transitions on the data
cable during circuit initialization or connection to a live
backplane, and short-circuit current limiting and ther-
mal-shutdown circuitry protect the driver against exces-
sive power dissipation.
The MAX3293/MAX3294/MAX3295 are offered in a
6-pin SOT23 package, and are specified over the
automotive temperature range.
Applications
●● RS-485/RS-422 Communications
●● Clock Distribution
●● Telecom Equipment
●● Automotive
●● Security Equipment
●● Point-of-Sale Equipment
●● Industrial Control
Typical Operating Circuit
DI Z
DY
DE
120Ω
MAX3293
MAX3294
MAX3295
R RO
MAX3280E
MAX3281E
MAX3283E
MAX3284E
Features
●● Space-Saving 6-Pin SOT23 Package
●● 250kbps/2.5Mbps/20Mbps Data Rates Available
●● Operate from a Single +3.3V Supply
●● ESD Protection
±9kV–Human Body Model
●● Slew-Rate Limited for Errorless Data Transmission
(MAX3293/MAX3294)
●● 1µA Low-Current Shutdown Mode
●● -7V to +12V Common-Mode Input Voltage Range
●● Current Limiting and Thermal Shutdown for
Driver-Overload Protection
●● Hot-Swap Inputs for Telecom Applications
●● Automotive Temperature Range (-40°C to +125°C)
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX3293AUT+T
-40°C to +125°C 6 SOT23-6
MAX3294AUT+T
-40°C to +125°C 6 SOT23-6
MAX3295AUT+T
-40°C to +125°C 6 SOT23-6
MAX3295AUT/V+T -40°C to +125°C 6 SOT23-6
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
/V denotes automotive-qualified package.
Selector Guide
PART
MAX3293AUT+T
MAXIMUM SLEW-
DATA RATE RATE
(Mbps)
LIMITED
0.25
Yes
MAX3294AUT+T
2.5
Yes
MAX3295AUT+T
MAX3295AUT/V+T
20
20
No
No
TOP
MARK
ABNI or
ABVH
ABNJ or
ABVI
ABNK or
ABVJ
+ACSB
Pin Configuration appears at end of data sheet.
19-2770; Rev 4; 12/14
1 page  
MAX3293–MAX3295
Test Circuits and Timing Diagrams
Y
VOD
Z
R
R
Figure 1. Driver DC Test Load
VOC
3V
DE
DI Y
Z
VID
RDIFF
CL
CL
Figure 2. Driver Timing Test Circuit
3V
DI
0V
1.5V
f = 1MHz, tR 3ns, tF 3ns
tPLH tPHL
1.5V
1/2 VO
Z
VO
Y
1/2 VO
VO
VDIFF 0V
-VO
10%
tR
VDIFF = V (Y) - V (Z)
90% 90%
tF
tSKEW = | tPLH - tPHL |
Figure 3. Driver Propagation Delays
10%
20Mbps, +3.3V, SOT23 RS-485/
RS-422 Transmitters
OUTPUT
UNDER TEST
RL
CL
VCC
S1
S2
Figure 4. Enable/Disable Timing Test Load
3V
DE
0V
1.5V
1.5V
tZL(SHDN), tZL
tLZ
Y, Z
VOL 2.3V OUTPUT NORMALLY LOW
OUTPUT NORMALLY HIGH
Y, Z
2.3V
0V
tZH(SHDN), tZH
tHZ
Figure 5. Driver Enable and Disable Times
VOL+ 0.25V
VOH- 0.25V
www.maximintegrated.com
Maxim Integrated │ 5
5 Page 
MAX3293–MAX3295
20Mbps, +3.3V, SOT23 RS-485/
RS-422 Transmitters
Revision History
REVISION
NUMBER
3
4
REVISION
DATE
3/11
12/14
DESCRIPTION
Added lead-free parts to the Ordering Information and Selector Guide tables
Added MAX3295AUT/V+T to Ordering Information
PAGES
CHANGED
1
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits)
shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. © 2014 Maxim Integrated Products, Inc. │ 11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet MAX3294.PDF ] | |
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