Isolators

ISO1540DR

Active

2.5-KVRMS, ISOLATED BIDIRECTIONAL CLOCK, BIDIRECTIONAL I2C ISOLATOR

Deep-Dive with AI

Search across all available documentation for this part.

DocumentsUnderstanding Transient Drive Strength vs. DC Drive Strength in Level-Shifters (Rev. A)Designing an Isolated I2C Bus interface by using digital isolators (Rev. A)+12

Isolators

ISO1540DR

Active

Texas Instruments

2.5-KVRMS, ISOLATED BIDIRECTIONAL CLOCK, BIDIRECTIONAL I2C ISOLATOR

Deep-Dive with AI

DocumentsUnderstanding Transient Drive Strength vs. DC Drive Strength in Level-Shifters (Rev. A)Designing an Isolated I2C Bus interface by using digital isolators (Rev. A)+12

Specifications Series Pricing Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	ISO1540DR

Channel Type	Bidirectional
Common Mode Transient Immunity (Min) [Min]	25 kV/µs
Data Rate	1 Mbps
Inputs - Side 1/Side 2 [custom]	2
Inputs - Side 1/Side 2 [custom]	2
Isolated Power	False
Mounting Type	Surface Mount
Number of Channels [custom]	2
Operating Temperature [Max]	125 °C
Operating Temperature [Min]	-40 °C
Package / Case	8-SOIC
Package / Case [x]	0.154 in
Package / Case [y]	3.9 mm
Pulse Width Distortion (Max)	80 ns, 21 ns
Supplier Device Package	8-SOIC
Technology	Capacitive Coupling
Type	I2C
Voltage - Isolation	2500 Vrms
Voltage - Supply [Max]	5.5 V
Voltage - Supply [Min]	3 V

ISO1540-Q1 Series

Automotive, 2.5-kVrms, isolated bidirectional clock, bidirectional I2C isolator

Part	Grade	Technology	Voltage - Supply [Max]	Voltage - Supply [Min]	Channel Type	Inputs - Side 1/Side 2 [custom]	Inputs - Side 1/Side 2 [custom]	Common Mode Transient Immunity (Min) [Min]	Supplier Device Package	Data Rate	Qualification	Pulse Width Distortion (Max)	Type	Package / Case	Package / Case [y]	Package / Case [x]	Mounting Type	Voltage - Isolation	Number of Channels [custom]	Operating Temperature [Max]	Operating Temperature [Min]
Texas Instruments ISO1540QDQ1	Automotive	Capacitive Coupling	5.5 V	3 V	Bidirectional	2	2	25 kV/µs	8-SOIC	1 Mbps	AEC-Q100	21 ns 80 ns	I2C	8-SOIC	3.9 mm	0.154 in	Surface Mount	2500 Vrms	2	125 °C	-40 °C
Texas Instruments ISO1540DR		Capacitive Coupling	5.5 V	3 V	Bidirectional	2	2	25 kV/µs	8-SOIC	1 Mbps		21 ns 80 ns	I2C	8-SOIC	3.9 mm	0.154 in	Surface Mount	2500 Vrms	2	125 °C	-40 °C
Texas Instruments ISO1540QDRQ1	Automotive	Capacitive Coupling	5.5 V	3 V	Bidirectional	2	2	25 kV/µs	8-SOIC		AEC-Q100	21 ns 80 ns	I2C	8-SOIC	3.9 mm	0.154 in	Surface Mount	2500 Vrms	2	125 °C	-40 °C

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Cut Tape (CT)	1	$ 5.59
		10	$ 3.75
		25	$ 3.27
		100	$ 2.74
		250	$ 2.48
		500	$ 2.32
		1000	$ 2.19
	Digi-Reel®	1	$ 5.59
		10	$ 3.75
		25	$ 3.27
		100	$ 2.74
		250	$ 2.48
		500	$ 2.32
		1000	$ 2.19
	Tape & Reel (TR)	2500	$ 2.05
Newark	Each (Supplied on Cut Tape)	1	$ 5.24
		10	$ 5.01
		25	$ 4.76
		50	$ 4.56
		100	$ 4.36
		250	$ 4.22
		500	$ 4.12
		1000	$ 4.05
Texas Instruments	LARGE T&R	1	$ 3.23
		100	$ 2.83
		250	$ 1.99
		1000	$ 1.60

Description

General part information

ISO1540-Q1 Series

The ISO1540-Q1 and ISO1541-Q1 devices are low-power, bidirectional isolators that are compatible with I2C interfaces. These devices have logic input and output buffers that are separated by Texas Instruments Capacitive Isolation technology using a silicon dioxide (SiO2) barrier. When used with isolated power supplies, these devices block high voltages, isolate grounds, and prevent noise currents from entering the local ground and interfering with or damaging sensitive circuitry.

This isolation technology provides for function, performance, size, and power consumption advantages when compared to optocouplers. The ISO1540-Q1 and ISO1541-Q1 devices enable a complete isolated I2C interface to be implemented within a small form factor.

The ISO1540-Q1 has two isolated bidirectional channels for clock and data lines while the ISO1541-Q1 has a bidirectional data and a unidirectional clock channel. The ISO1541-Q1 is useful in applications that have a single controller while the ISO1540-Q1 is suitable for multi-controller applications. For applications where clock stretching by the target is possible, the ISO1540-Q1 device should be used.