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
MAX3465/
MAX3466
MAX3467
MAX3468/
MAX3469
NAME FUNCTION
1 — — SHDN Shutdown. Drive SHDN high to enter low-power shutdown mode.
221RO
Receiver Output. When RE is low and (A - B) ≥ -50mV, RO is high; if (A - B) ≤
-200mV, RO is low.
3—2RE
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.
4—3DE
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. Do not leave RE unconnected when using
the MAX3466 or MAX3469.
534DI
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.
6, 7 4 5 GND Ground
8 — — TXP
Transmitter Phase. Connect TXP to GND, or leave unconnected for normal
transmitter phase/polarity. Connect TXP to V
CC
to invert the transmitter
hase/
olarit
. TXP has an internal 15
A
ulldown.
9 5 — Y Noninverting Driver Output
10 6 — Z Inverting Driver Output
11 7 — B Inverting Receiver Input
12 8 — A Noninverting Receiver Input
13 — — RXP
Receiver Phase. Connect RXP to GND, or leave unconnected for normal
receiver phase/polarity. Connect RXP to V
CC
to invert the receiver
hase/
olarit
. RXP has an internal 15
A
ulldown.
14 1 8 V
CC
P osi ti ve S up p l y: + 4.75V ≤ V
C C
≤ + 5.25V . Byp ass V
C C
to GN D w i th a 0.1µF cap acitor .
— — 7 B Inverting Receiver Input and Inverting Driver Output
— — 6 A Noninverting Receiver Input and Noninverting Driver Output