SP3070E Datasheet, PDF (13/20 Pages) Exar Corporation – ±15kV ESD-Protected, 3.3V, 1/8 Load, Failsafe RS-485/RS422 Transceivers

Pin description
FULL DUPLEX
DEVICES
HALF
DUPLEX
DEVICES
SP3070E SP3071E SP3072E
SP3073E SP3074E SP3075E
SP3076E SP3077E SP3078E
PIN NUMBER
2
2
1
3
-
2
4
-
3
5
3
4
6, 7
4
5
9
5
-
10
6
-
11
7
-
-
-
7
12
8
-
-
-
6
14
1
8
1, 8, 13
-
-
PIN
NAME
PIN FUNCTION
RO
RE
DE
DI
GND
Y
Z
B
B
A
A
V_CC
NC
Receiver Output. When RE is low and if (A – B) ≥
-50mV, RO is High. If (A – B) ≤ - 200mV, RO is low.
Receiver Output Enable. When RE is low, RO is enabled.
When RE is high, RO is high impedance. RE should be
high and DE low to enter shutdown mode. RE is a hot-
swap input.
Driver Output Enable. When DE is high, outputs are
enabled. When DE is low, outputs are high impedance. DE
should be low and RE high to enter shutdown mode. DE is
a hot-swap input.
Driver Input. With DE high, a low level on DI forces
noninverting output low and inverting output high. Similarly,
a high level on DI forces noninverting output high and
inverting output low.
Ground
Noninverting Driver Output
Inverting Driver Output
Inverting Receiver Input
Inverting Receiver Input and Inverting Driver Output
Noninverting Receiver Input
Noninverting Receiver Input and Noninverting Driver
Output
Positive Supply V_CC . Bypass V_CC to GND with a 0.1uF
capacitor.
No Connect
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
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SP3070E-SP3078E_100_061109