ISO7421E-Q1 Datasheet, PDF (1/18 Pages) Texas Instruments – Low-Power Dual Digital Isolators

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ISO7421E-Q1
SLLSEA5B – MARCH 2012 – REVISED JUNE 2012
Low-Power Dual Digital Isolators
Check for Samples: ISO7421E-Q1
FEATURES
1
• Qualified for Automotive Applications
• AEC-Q100 Qualified with the following results:
– Device Temperature Grade 1: -40°C to
+125°C Ambient Operating Temperature
Range
– Device HBM ESD Classification Level H3A
– Device CDM ESD Classification Level C4
• Propagation Delay Less Than 20 ns
• Low Power Consumption
• Wide Ambient Temperature: –40°C to 125°C
• Safety and Regulatory Approvals
– 4 kV peak Maximum Isolation, 2.5 kVrms
per UL 1577, IEC/VDE and CSA Approved,
IEC 60950-1, IEC 61010-1 End Equipment
Standards Approved. All Approvals
Pending.
• 50 kV/µs Transient Immunity Typical
• Operates From 3.3 V or 5 V Supply and Logic
Levels
APPLICATIONS
• Opto-Coupler Replacement in:
– Servo Control Interface
– Motor Control
– Power Supply
– Battery Packs
DESCRIPTION
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.
ISO7421E-Q1
GND1 1
16
NC 2
15
VCC1 3
14
OUTA 4
13
INB 5
12
NC 6
11
GND1 7
10
NC ⁸
9
NC = No Internal Connection
GND2
NC
VCC2
INA
OUTB
NC
NC
GND2
1
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2012, Texas Instruments Incorporated