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
*Patent pending
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)
INDUSTRY STANDARD
PINOUT
TOP VIEW
PART
T1IN
Y1
1
2
3
4
5
6
7
8
16 V
CC
MAX3040
MAX3041
MAX3042B
MAX3043
MAX3044
MAX3045B
250k
2.5M
20M
250k
2.5M
20M
75174, 34C87, LTC487
75174, 34C87, LTC487
75174, 34C87, LTC487
26LS31
15 T4IN
14 Y4
13 Z4
Z1
EN12
Z2
MAX3040
MAX3041
MAX3042B
12 EN34
11 Z3
26LS31
Y2
26LS31
T2IN
GND
10 Y3
9
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.