MAX14945 Datasheet, PDF (11/21 Pages) Maxim Integrated Products – 2.75kVRMS Isolated 500kbps Half-Duplex RS-485

MAX14945
2.75kV_RMS Isolated 500kbps Half-Duplex RS-485/
RS-422 Transceiver with ±30kV ESD Protection
Typical Operating Characteristics (continued)
(VDDA – VGNDA = 3.3V, VDDB – VGNDB = 5V, VGNDA = VGNDB, and TA = +25°C, unless otherwise noted.)
DRIVER ENABLE/DISABLE
500
DELAY vs. TEMPERATURE _toc10
450
400
350
300
250
t_DZL
t_DZH
200
150
100
t_DLZ
t_DHZ
50
0
-45 -30 -15 0 15 30 45 60 75 90
TEMPERATURE (°C)
DRIVER
PROPAGATION DELAY
R_L = 54Ω
C_L = 50pF
toc11
TXD
2V/div
0V
A
2V/div
B
2V/div
200ns/div
RECEIVER
PROPAGATION DELAY
C_L = 15pF
toc12
RXD
2V/div
0V
A
2V/div
200ns/div
B
2V/div
V_DDA SUPPLY CURRENT
8
vs. DATA RATE
toc13
7
6
5
4
3
2
1
0
0
100
200
300
400
500
DATA RATE (kbps)
V_DDB SUPPLY
90
CURRENT vs. DATA RATE _toc14
80
54Ω LOAD
70
60
50
40
120Ω LOAD
30
20
NO LOAD
10
0
0
100
200
300
400
500
DATA RATE (kbps)
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