MAX3293 Datasheet, PDF (1/11 Pages) Maxim Integrated Products – 20Mbps, +3.3V, SOT23 RS-485/ RS-422 Transmitters

19-2770; Rev 1; 2/03
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 communication
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 thermal-
shutdown circuitry protect the driver against excessive
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
Pin Configuration
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
MAX3293AUT-T
MAX3294AUT-T
MAX3295AUT-T
TEMP RANGE
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
PIN-
PACKAGE
6 SOT23-6
6 SOT23-6
6 SOT23-6
PART
MAX3293AUT-T
MAX3294AUT-T
MAX3295AUT-T
Selector Guide
MAXIMUM
DATA RATE
(Mbps)
0.25
2.5
20
SLEW-RATE TOP
LIMITED MARK
Yes
ABNI
Yes
ABNJ
No
ABNK
Typical Operating Circuit
TOP VIEW
DI 1
6Y
V_CC 2
DE 3
MAX3293
MAX3294
MAX3295
5 GND
4Z
SOT23-6
Z
DI
D
Y
DE
MAX3293
MAX3294
MAX3295
120Ω
R
RO
MAX3280E
MAX3281E
MAX3283E
MAX3284E
________________________________________________________________ Maxim Integrated Products 1
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.