ISO7421ED

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Texas Instruments

DUAL-CHANNEL, 1/1, 50-MBPS DIGITAL ISOLATOR

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ISO7421ED

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Texas Instruments

DUAL-CHANNEL, 1/1, 50-MBPS DIGITAL ISOLATOR

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Description Specifications Series Pricing CAD Documents

Description

General part information

ISO7421 Series

The ISO7421E-Q1 provides double galvanic isolation of up to 2.5 KVrms for 1 minute per UL. This digital isolator has two isolation channels in a bi-directional configuration. Each isolation channel has a logic input and output buffer separated by a silicon oxide (SiO2) insulation barrier. Used in conjunction with isolated power supplies, these devices prevent noise currents on a data bus or other circuits from entering the local ground and interfering with or damaging sensitive circuitry.

The devices have TTL input thresholds and require two supply voltages, 3.3 V or 5 V, or any combination. All inputs are 5-V tolerant when supplied from a 3.3-V supply.

Note:The ISO7421E-Q1 is specified for signaling rates up to 50 Mbps. Due to their fast response time, under most cases, these devices will also transmit data with much shorter pulse widths. Designers should add external filtering to remove spurious signals with input pulse duration < 20 ns if desired.

Technical Specifications

Parameters and characteristics for this part

Specification	ISO7421ED

Channel Type	Unidirectional
Common Mode Transient Immunity (Min)	25 kV/µs
Data Rate	50 Mbps
Fall Time (Typ)	1.7 ns
Inputs - Side 1	1
Inputs - Side 2	1
Isolated Power	No
Mounting Type	Surface Mount
Number of Channels	2
Operating Temperature (Max)	125 °C
Operating Temperature (Min)	-40 °C
Package Length	0.154 in
Package Name	8-SOIC
Package Width	3.9 mm
Propagation Delay tpHL (Max)	11 ns
Propagation Delay tpLH (Max)	11 ns
Pulse Width Distortion (Max)	3.7 ns
Rise Time (Typ)	1.8 ns
Technology	Capacitive Coupling
Type	General Purpose
Voltage - Isolation	2500 Vrms
Voltage - Supply (Maximum)	5.5 V
Voltage - Supply (Minimum)	3 V

ISO7421 Series

Automotive, dual-channel, 1/1, 50-Mbps digital isolator

Part	Channel Type	Package Length	Package Name	Package Width	Type	Isolated Power	Technology	Propagation Delay tpHL (Max)	Propagation Delay tpLH (Max)	Pulse Width Distortion (Max)	Inputs - Side 1	Inputs - Side 2	Mounting Type	Voltage - Isolation	Rise Time (Typ)	Fall Time (Typ)	Operating Temperature (Min)	Operating Temperature (Max)	Voltage - Supply (Range 2 Minimum)	Voltage - Supply (Range 1 Minimum)	Voltage - Supply (Range 1 Maximum)	Voltage - Supply (Range 2 Maximum)	Data Rate	Number of Channels	Common Mode Transient Immunity (Min)	Voltage - Supply (Maximum)	Voltage - Supply (Minimum)	Grade	Qualification
Texas Instruments ISO7421DR	Unidirectional	0.154 in	8-SOIC	3.9 mm	General Purpose	No	Capacitive Coupling	14 ns	14 ns	3.7 ns	1	1	Surface Mount	2500 Vrms	1 ns	1 ns	-40 °C	105 °C	4.75 V	3.15 V	3.45 V	5.25 V	1 Mbps	2	25 kV/µs
Texas Instruments ISO7421ED	Unidirectional	0.154 in	8-SOIC	3.9 mm	General Purpose	No	Capacitive Coupling	11 ns	11 ns	3.7 ns	1	1	Surface Mount	2500 Vrms	1.8 ns	1.7 ns	-40 °C	125 °C					50 Mbps	2	25 kV/µs	5.5 V	3 V
Texas Instruments ISO7421AQDRQ1	Unidirectional	0.154 in	8-SOIC	3.9 mm	General Purpose	No	Capacitive Coupling	14 ns	14 ns	3.7 ns	1	1	Surface Mount	2500 Vrms	1 ns	1 ns	-40 °C	125 °C					50 Mbps	2	25 kV/µs	5.5 V	3 V	Automotive	AEC-Q100
Texas Instruments ISO7421MDREP	Unidirectional	0.154 in	8-SOIC	3.9 mm	General Purpose	No	Capacitive Coupling	14 ns	14 ns	4 ns	1	1	Surface Mount	2500 Vrms	1 ns	1 ns	-55 °C	125 °C	4.5 V	3 V	3.6 V	5.5 V	1 Mbps	2	25 kV/µs
Texas Instruments ISO7421FEDR	Unidirectional	0.154 in	8-SOIC	3.9 mm	General Purpose	No	Capacitive Coupling	11 ns	11 ns	3.7 ns	1	1	Surface Mount	2500 Vrms	1.8 ns	1.7 ns	-40 °C	125 °C					50 Mbps	2	25 kV/µs	5.5 V	3 V
Texas Instruments ISO7421D	Unidirectional	0.154 in	8-SOIC	3.9 mm	General Purpose	No	Capacitive Coupling	14 ns	14 ns	3.7 ns	1	1	Surface Mount	2500 Vrms	1 ns	1 ns	-40 °C	105 °C	4.75 V	3.15 V	3.45 V	5.25 V	1 Mbps	2	25 kV/µs
Texas Instruments ISO7421FED	Unidirectional	0.154 in	8-SOIC	3.9 mm	General Purpose	No	Capacitive Coupling	11 ns	11 ns	3.7 ns	1	1	Surface Mount	2500 Vrms	1.8 ns	1.7 ns	-40 °C	125 °C					50 Mbps	2	25 kV/µs	5.5 V	3 V
Texas Instruments ISO7421EQDWRQ1	Unidirectional	0.295 in	16-SOIC	7.5 mm	General Purpose	No	Capacitive Coupling	14 ns	14 ns	3.7 ns	1	1	Surface Mount	2500 Vrms	1 ns	1 ns	-40 °C	125 °C	4.75 V	3.15 V	3.45 V	5.25 V	50 Mbps	2	25 kV/µs			Automotive	AEC-Q100
Texas Instruments ISO7421QDRQ1	Unidirectional	0.154 in	8-SOIC	3.9 mm	General Purpose	Yes	Capacitive Coupling	14 ns	14 ns	3.7 ns	1	1	Surface Mount	2500 Vrms	1 ns	1 ns	-40 °C	125 °C	4.75 V	3.15 V	3.45 V	5.25 V	1 Mbps	2	25 kV/µs
Texas Instruments ISO7421EDR	Unidirectional	0.154 in	8-SOIC	3.9 mm	General Purpose	No	Capacitive Coupling	11 ns	11 ns	3.7 ns	1	1	Surface Mount	2500 Vrms	1.8 ns	1.7 ns	-40 °C	125 °C					50 Mbps	2	25 kV/µs	5.5 V	3 V