19-2143; Rev 1; 12/01
±±0ꢀk ꢁEDꢂ-rotected, Quad 5k REꢂ485/REꢂ422
Transmitters
General Description
Features
The MAX3040–MAX3045 is a family of 5V quad RS-
485/RS-422 transmitters designed for digital data trans-
mission over twisted-pair balanced lines. All transmitter
outputs are protected to ±±0ꢀV using the ꢁuman ꢂody
Model. In addition the MAX3040–MAX3045 withstand
±4ꢀV per IꢃE ±000-4-4 ꢃlectrical ꢄast Transient/ꢂurst
Stressing. The MAX3040/MAX3043 (250ꢀbps) and the
MAX304±/MAX3044 (2.5Mbps) are slew-rate limited
transmitters that minimize ꢃMI and reduce reflections
caused by improperly terminated cables, thus allowing
error-free transmission.
♦ ESD Protection: ±±10kV—Humn ꢀoꢁd ꢂoꢁeꢃ
♦ Singꢃe +5k Opermtion
♦ GHmrmnteeꢁ Device-to-Device S0ew
(ꢂAX3141/ꢂAX314±/ꢂAX3143/ꢂAX3144)
♦ Pin-Coupmtibꢃe with ‘SN75±74, ‘26LS3±C mnꢁ
LTC487
♦ —ot-Swmppmbꢃe for Teꢃecou Appꢃicmtions
♦ Up to 21ꢂbps Dmtm Rmte (ꢂAX3142ꢀ/ꢂAX3145ꢀ)
♦ Sꢃew-Rmte Liuiteꢁ (Dmtm Rmtes mt 2.5ꢂbps mnꢁ
2510bps)
The MAX3040–MAX3045 feature a hot-swap capability
that eliminates false transitions on the data cable during
power-up or hot insertion. The MAX3042ꢂ/MAX3045ꢂ
are optimized for data transfer rates up to 20Mbps, the
MAX304±/MAX3044 for data rates up to 2.5Mbps, and
the MAX3040/MAX3043 for data rates up to 250ꢀbps.
The MAX3040–MAX3045 offer optimum performance
when used with the MAX3093ꢃ or MAX3095 5V quad
differential line receivers or MAX3094ꢃ/MAX3096 3V
quad differential line receivers.
♦ 2nA Low-Power ShHtꢁown ꢂoꢁe
♦ ±uA Opermting SHppꢃd CHrrent
♦ ±40k EꢄT ꢄmst Trmnsient ꢀHrst ꢅuuHnitd per ꢅEC
±111-4-4
♦ Leveꢃ 2 SHrge ꢅuuHnitd per ꢅEC ±111-4-5,
Unshieꢃꢁeꢁ Cmbꢃe ꢂoꢁeꢃ
♦ Uꢃtrm-Sumꢃꢃ ±6-Pin TSSOP, ±6-Pin Nmrrow SO, mnꢁ
Wiꢁe ±6-Pin SO
The MAX3040–MAX3045 are ꢃSD-protected pin-compat-
ible, low-power upgrades to the industry-standard
‘SN75±74 and ‘DS26LS3±E. They are available in space-
saving TSSOP, narrow SO, and wide SO pacꢀages.
Ordering Information
DATA
PART
TEꢂP RANGE PꢅN-PACKAGE
RATE
ꢂAX3141EUꢃ
MAX3040ESꢃ
MAX3040EWꢃ
0°E to +70°E ±6 TSSOP
0°E to +70°E ±6 Narrow SO
0°E to +70°E ±6 Wide SO
250ꢀbps
250ꢀbps
250ꢀbps
250ꢀbps
250ꢀbps
250ꢀbps
Applications
Telecommunications ꢃquipment
Industrial Motor Eontrol
MAX3040ꢃUꢃ -40°E to +85°E ±6 TSSOP
MAX3040ꢃSꢃ -40°E to +85°E ±6 Narrow SO
MAX3040ꢃWꢃ -40°E to +85°E ±6 Wide SO
Transmitter for ꢃSD-Sensitive Applications
ꢁand-ꢁeld ꢃquipment
Ordering Information continued at end of data sheet.
Industrial PLEs
Networꢀing
-in Configurations
Eelector Guide
DATA RATE
(bps)
ꢅNDUSTRY STANDARD
PꢅNOUT
TOP VIEW
PART
T1IN
Y1
1
2
3
4
5
6
7
8
16 V
CC
MAX3040
MAX304±
MAX3042ꢂ
MAX3043
MAX3044
MAX3045ꢂ
250ꢀ
2.5M
20M
250ꢀ
2.5M
20M
75±74, 34E87, LTE487
75±74, 34E87, LTE487
75±74, 34E87, LTE487
26LS3±
15 T4IN
14 Y4
13 Z4
Z1
EN12
Z2
MAX3040
MAX3041
MAX3042B
12 EN34
11 Z3
26LS3±
Y2
26LS3±
T2IN
GND
10 Y3
9
T3IN
±6 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.