19-2143; Rev 1; 12/01
±10kV ESD-Protected, Quad 5V RS-485/RS-422
Transmitters
The MAX3040–MAX3045 is a family of 5V quad RS485/RS-422 transmitters designed for digital data transmission over twisted-pair balanced lines. All transmitter
outputs are protected to ±10kV using the Human Body
Model. In addition the MAX3040–MAX3045 withstand
±4kV per IEC 1000-4-4 Electrical Fast Transient/Burst
Stressing. The MAX3040/MAX3043 (250kbps) and the
MAX3041/MAX3044 (2.5Mbps) are slew-rate limited
transmitters that minimize EMI and reduce reflections
caused by improperly terminated cables, thus allowing
error-free transmission.
The MAX3040–MAX3045 feature a hot-swap capability
that eliminates false transitions on the data cable during
power-up or hot insertion. The MAX3042B/MAX3045B
are optimized for data transfer rates up to 20Mbps, the
MAX3041/MAX3044 for data rates up to 2.5Mbps, and
the MAX3040/MAX3043 for data rates up to 250kbps.
The MAX3040–MAX3045 offer optimum performance
when used with the MAX3093E or MAX3095 5V quad
differential line receivers or MAX3094E/MAX3096 3V
quad differential line receivers.
The MAX3040–MAX3045 are ESD-protected pin-compatible, low-power upgrades to the industry-standard
‘SN75174 and ‘DS26LS31C. They are available in spacesaving TSSOP, narrow SO, and wide SO packages.
Features
♦ ESD Protection: ±10kV—Human Body Model
♦ Single +5V Operation
♦ Guaranteed Device-to-Device Skew
(MAX3040/MAX3041/MAX3043/MAX3044)
♦ Pin-Compatible with ‘SN75174, ‘26LS31C and
LTC487
♦ Hot-Swappable for Telecom Applications
♦ Up to 20Mbps Data Rate (MAX3042B/MAX3045B)
♦ Slew-Rate Limited (Data Rates at 2.5Mbps and
250kbps)
♦ 2nA Low-Power Shutdown Mode
♦ 1mA Operating Supply Current
♦ ±4kV EFT Fast Transient Burst Immunity per IEC
1000-4-4
♦ Level 2 Surge Immunity per IEC 1000-4-5,
Unshielded Cable Model
♦ Ultra-Small 16-Pin TSSOP, 16-Pin Narrow SO, and
Wide 16-Pin SO
Ordering Information
DATA
RATE
PART
TEMP RANGE
MAX3040CUE
0°C to +70°C
16 TSSOP
250kbps
MAX3040CSE
0°C to +70°C
16 Narrow SO
250kbps
Telecommunications Equipment
MAX3040CWE
0°C to +70°C
16 Wide SO
250kbps
Industrial Motor Control
MAX3040EUE
-40°C to +85°C
16 TSSOP
250kbps
Transmitter for ESD-Sensitive Applications
MAX3040ESE
-40°C to +85°C
16 Narrow SO
250kbps
Hand-Held Equipment
MAX3040EWE -40°C to +85°C
16 Wide SO
250kbps
Industrial PLCs
Ordering Information continued at end of data sheet.
Applications
Networking
PART
Pin Configurations
Selector Guide
DATA RATE
(bps)
INDUSTRY STANDARD
PINOUT
PIN-PACKAGE
TOP VIEW
T1IN 1
16 VCC
MAX3040
250k
75174, 34C87, LTC487
Y1 2
15 T4IN
MAX3041
2.5M
75174, 34C87, LTC487
Z1 3
MAX3042B
20M
75174, 34C87, LTC487
EN12 4
MAX3043
250k
26LS31
Z2 5
MAX3044
2.5M
26LS31
Y2 6
11 Z3
MAX3045B
20M
26LS31
T2IN 7
10 Y3
GND 8
9
14 Y4
MAX3040
MAX3041
MAX3042B
13 Z4
12 EN34
T3IN
16 TSSOP/SO
Pin Configurations continued at end of data sheet.
________________________________________________________________ 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
MAX3040–MAX3045
General Description
