MAX3465–MAX3469
+5V, Fail-Safe, 40Mbps, Profibus RS-485/
RS-422 Transceivers
6 _______________________________________________________________________________________
Typical Operating Characteristics (continued)
(V
CC
= +5V, T
A
= +25°C, unless otherwise noted.)
DRIVER AND RECEIVER
PROPAGATION DELAYS
MAX3465 toc13
10ns/div
5V/div
5V/div
2V/div
Y, Z
DI
RO
R
DIFF
= 54Ω
DATA RATE = 20Mbps
ENABLE RESPONSE TIME
MAX3465 toc14
20ns/div
5V/div
1V/div
Y, Z
DE
R
DIFF
= 54Ω
EYE DIAGRAM
MAX3465 toc15
10ns/div
1V/div
Y, Z
R
DIFF
= 54Ω
DATA RATE = 20Mbps
PIN
FULL DUPLEX
HALF
DUPLEX
NAME FUNCTION
MAX3465/
MAX3466
MAX3467
MAX3468/
MAX3469
SHDN Shutdown. Drive SHDN high to enter low-power shutdown mode.
1 ——RO
Receiver Output. When RE is low and (A - B) ≥ -50mV, RO is high; if (A - B) ≤
-200mV, RO is low.
221RE
Receiver Output Enable. Drive RE low to enable RO; RO is high impedance
when RE is high. Drive RE high and DE low to enter low-power shutdown mode.
3 — 2DE
Driver Output Enable. Drive DE high to enable driver output. The driver
outputs are high impedance when DE is low. Drive RE high and DE low to
enter low-power shutdown mode.
4 — 3DI
Driver Input. With DE high, a low on DI forces the noninverting output low and
the inverting output high. Similarly, a high on DI forces the noninverting output
high and the inverting output low.
5 3 4 GND Ground
6, 7 4 5 TXP
Transmitter Phase. Connect TXP to GND, or leave unconnected for normal
transmitter phase/polarity. Connect TXP to V
CC
to invert the transmitter
phase/polarity. TXP has an internal 15µA pulldown.
8 ——Y Noninverting Driver Output
95— Z Inverting Driver Output
10 6 — B Inverting Receiver Input
11 7 — A Noninverting Receiver Input
12 8 — RXP
Receiver Phase. Connect RXP to GND, or leave unconnected for normal
receiver phase/polarity. Connect RXP to V
CC
to invert the receiver
phase/polarity. RXP has an internal 15µA pulldown.
13 ——V
CC
Positive Supply: +4.75V ≤ V
CC
≤ +5.25V. Bypass V
CC
to GND with a 0.1µF
capacitor.
14 1 8 B Inverting Receiver Input and Inverting Driver Output
—— 7 A Noninverting Receiver Input and Noninverting Driver Output
——
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