SP3070-3078E Datasheet, PDF (16/19 Pages) Sipex Corporation – 15kV ESD-Protected, 3.3V, 1/8 Load, Failsafe RS-485/RS422 Transceivers

DRIVER OUTPUT PROTECTION
Two mechanisms prevent excessive output
current and power dissipation caused by
faults or by bus contention. First, current
limit on the ouput stage, provides immediate
protection against short circuits over the
whole common-mode voltage range. Sec-
ond, a thermal-shutdown circuit, forces the
driver outputs into a high-impedance state if
the die temperature becomes excessive.
LINE LENGTH
The RS-485/RS422 standard covers line
lengths up to 4000ft.
DETAILED DESCRIPTION
TYPICAL APPLICATIONS
The SP3072E, SP3075E and SP3078E
transceivers are designed for bidirectional
data communications on multipoint bus trans-
mission lines.
To minimize reflections, terminate the line at
both ends in its characteristic impedance,
and keep stub lengths off the main line as
short as possible. The slew-rate-limited
SP3070 - SP3075E are more tolerant of
imperfect termination.
PARTS SELECTOR GUIDE
PART
NUMBER
SP3070E
SP3071E
SP3072E
SP3073E
SP3074E
SP3075E
SP3076E
SP3077E
SP3078E
Half/Full
Duplex
Full
Full
Half
Full
Full
Half
Full
Full
Half
Datarate
Mbps
0.25
0.25
0.25
0.5
0.5
0.5
16
16
16
Shut-
down
Receiver
Driver Enable
Trans.
On Bus
Pin
Count
Industry Standard
Pinout
Pin
Compatible
Upgrade from:
Yes
Yes
256
14 MAX3070E, 75180
No
No
256
8 MAX 3071E, 75179
SP3493
Yes
Yes
256
8 MAX 3072E, 75176
SP3483
Yes
Yes
256
14 MAX 3073E, 75180
No
No
256
8 MAX 3074E, 75179
Yes
Yes
256
8 MAX 3075E, 75176
SP3494
Yes
Yes
256
14 MAX 3076E, 75180
SP3491
No
No
256
8 MAX3077E, 75179
SP3490
Yes
Yes
256
8 ^{MAX 3078E, 75176}
SP3485,
SP3481
Date: 03/28/05
SP3070E - SP3078E Family, ±15kV ESD-Protected, Failsafe RS-485/RS422 Transceivers
16
© Copyright 2005 Sipex Corporation