ISL4489EIBZ-T Intersil, ISL4489EIBZ-T Datasheet - Page 9

• Manufacturer Part Number: ISL4489EIBZ-T
• Description: IC TXRX RS-485/422 LP HS 14-SOIC
• Manufacturer: Intersil
• Type: Transceiverr

Specifications of ISL4489EIBZ-T

• Number Of Drivers/receivers: 1/1
• Protocol: RS422, RS485
• Voltage - Supply: 4.5 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 14-SOIC (3.9mm Width), 14-SOL
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ESD Protection
All pins on these devices include class 3 Human Body
Model (HBM) ESD protection structures, but the RS-485
pins (driver outputs and receiver inputs) incorporate
advanced structures allowing them to survive ESD events
in excess of ±15kV HBM. The RS-485 pins are particularly
vulnerable to ESD damage because they typically connect
to an exposed port on the exterior of the finished product.
Simply touching the port pins, or connecting a cable, can
Typical Performance Curves
-100
-120
160
140
120
100
FIGURE 6. DRIVER OUTPUT CURRENT vs DIFFERENTIAL
FIGURE 8. DRIVER OUTPUT CURRENT vs SHORT CIRCUIT
-20
-40
-60
-80
80
60
40
20
90
80
70
60
50
40
30
20
10
0
0
0
-7 -6
ISL4489E
OUTPUT VOLTAGE
VOLTAGE
-4
DIFFERENTIAL OUTPUT VOLTAGE (V)
1
-2
Y OR Z = LOW
OUTPUT VOLTAGE (V)
ISL4491E
0
2
9
2
4
3
Y OR Z = HIGH
ISL4489E
6
V
CC
ISL4491E
= 5V, T
8
4
ISL4489E, ISL4491E
10
A
= 25°C; Unless Otherwise Specified
12
5
cause an ESD event that might destroy unprotected ICs.
These new ESD structures protect the device whether or
not it is powered up, protect without allowing any latchup
mechanism to activate, and without degrading the RS-485
common mode range of -7V to +12V. This built-in ESD
protection eliminates the need for board level protection
structures (e.g., transient suppression diodes), and the
associated, undesirable capacitive load they present.
FIGURE 7. DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs
400
350
300
250
200
150
100
50
3.6
3.4
3.2
2.8
2.6
2.4
2.2
3
2
-40
-40
FIGURE 9. SUPPLY CURRENT vs TEMPERATURE
-25
-25
TEMPERATURE
ISL4489E, DE = X, RE = X
ISL4491E, DE = X, RE = X
0
TEMPERATURE (°C)
TEMPERATURE (°C)
0
R
DIFF
25
25
= 100Ω
R
50
50
DIFF
= 54Ω
75
75
FN6074.3
85
85