SLLSEB6 – JULY 2012
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
PIN FUNCTIONS
ISO1540 and
ISO1541
NAME
VCC1
SDA1
SCL1
GND1
GND2
SCL2
SDA2
VCC2
I/O
PIN
1
2
3
4
5
6
7
8
ISO1540
-
I/O
I/O
-
-
I/O
I/O
-
ISO1541
-
I/O
I
-
-
O
I/O
-
DESCRIPTION
ISO1540
Supply Voltage, Side 1
Serial Data, Side 1 Input/Output
Ground, Side 1
Ground, Side 2
Serial Data Input/Output, Side 2
Supply Voltage, Side 2
ISO1541
Supply Voltage, Side 1
Serial Data, Side 1 Input/Output
Ground, Side 1
Ground, Side 2
Serial Data Input/Output, Side 2
Supply Voltage, Side 2
Serial Clock Input/Output, Side 1 Serial Clock Input, Side 1
Serial Clock Input/Output, Side 2 Serial Clock Output, Side 2
AVAILABLE OPTIONS
PRODUCT
ISO1540
4000-V
PK
and
2500-V
RMS (1)
ISO1541
(1)
D-8
SDA is Bidirectional
SCL is Unidirectional
IS1541
RATED ISOLATION PACKAGE
CHANNEL DIRECTION
Both SDA and SCL
are Bidirectional
MARKED AS
IS1540
ORDERING NUMBER
ISO1540D (rail)
ISO1540DR (reel)
ISO1541D (rail)
ISO1541DR (reel)
See the Regulatory Information table for detailed Isolation specifications.
Table 1. FUNCTION TABLE
(1)
POWER STATE
VCC1 or VCC2 < 2.1 V
VCC1 and VCC2 > 2.8 V
VCC1 and VCC2 > 2.8 V
VCC1 and VCC2 > 2.8 V
(1)
(2)
INPUT
X
L
H
Z
(2)
OUTPUT
Z
L
Z
?
H = High Level; L = Low Level; Z = High Impedance or Float; X = Irrelevant; ? = Indeterminate
Invalid input condition as an I
2
C system requires that a pull-up resistor to VCC is connected.
2
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