MAX3463 Просмотр технического описания (PDF) - Maxim Integrated
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MAX3463 Datasheet PDF : 14 Pages
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+5V, Fail-Safe, 20Mbps, Profibus RS-485/
RS-422 Transceivers
Typical Operating Characteristics (continued)
(VCC = +5V, TA = +25°C, unless otherwise noted.)
DRIVER AND RECEIVER
PROPAGATION DELAYS
MAX3460-64 toc13
ENABLE RESPONSE TIME
MAX3460-64 toc14
EYE DIAGRAM
DI 0
5V/div
DE
0
5V/div
Y, Z
2V/div
Y, Z
0
1V/div
RO 0
5V/div
0
10ns/div
20ns/div
10ns/div
Pin Description
MAX3460/
MAX3461
PIN
MAX3462
FULL DUPLEX
1
—
2
2
3
—
4
—
5
3
6, 7
4
8
—
9
5
10
6
11
7
12
8
13
—
14
1
—
—
—
—
MAX3463/
MAX3464
HALF
DUPLEX
—
1
2
3
4
5
—
—
—
—
—
—
8
7
6
NAME
FUNCTION
SHDN
RO
RE
DE
DI
GND
TXP
Y
Z
B
A
RXP
VCC
B
A
Shutdown. Drive SHDN high to enter low-power shutdown mode.
Receiver Output. When RE is low and (A - B) ≥ -50mV, RO is high; if (A - B) ≤
-200mV, RO is low.
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.
Driver Output Enable. Drive DE high to enable driver output. These outputs
are high impedance when DE is low. Drive RE high and DE low to enter low-
power shutdown mode.
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.
Ground
Transmitter Phase. Connect TXP to GND, or leave unconnected for normal
transmitter phase/polarity. Connect TXP to VCC to invert the transmitter
phase/polarity. TXP has an internal 15µA pulldown.
Noninverting Driver Output
Inverting Driver Output
Inverting Receiver Input
Noninverting Receiver Input
Receiver Phase. Connect RXP to GND, or leave unconnected for normal
receiver phase/polarity. Connect RXP to VCC to invert the receiver
phase/polarity. RXP has an internal 15µA pulldown.
Positive Supply: +4.75V ≤ VCC ≤ +5.25V. Bypass VCC to GND with a 0.1µF
capacitor.
Inverting Receiver Input and Inverting Driver Output
Noninverting Receiver Input and Noninverting Driver Output
6 _______________________________________________________________________________________
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