ISO7420FE Datasheet, PDF (1/19 Pages) Texas Instruments – Low-Power Dual Channel Digital Isolators

ISO7420E, ISO7420FE
ISO7421E, ISO7421FE
www.ti.com
SLLSE45B – DECEMBER 2010 – REVISED JANUARY 2011
Low-Power Dual Channel Digital Isolators
Check for Samples: ISO7420E, ISO7420FE, ISO7421E, ISO7421FE
FEATURES
1
•2 Signaling Rate > 50 Mbps
• For Devices with Suffix F, Output is Low in
Fail-Safe Mode
• Low Power Consumption: Typical I_CC per
Channel (3.3V Supplies):
– ISO7420: 1.4 mA at 1 Mbps, 2.5 mA at 25
Mbps
– ISO7421: 1.8 mA at 1 Mbps, 2.8 mA at 25
Mbps
• Low Propagation Delay: 7 ns (Typical)
• Low Pulse Skew: 200 ps (Typical)
• Wide T_A Range Specified: –40°C to 125°C
• 50 KV/ms Transient Immunity, Typical
• Isolation Barrier Life: > 25 Years
• Operates from 3V to 5.5V Supply Levels
• Narrow Body SOIC-8 Package
APPLICATIONS
• Opto-Coupler Replacement in:
– Industrial FieldBus
– ProfiBus
– ModBus
– DeviceNet™ Data Buses
– Servo Control Interface
– Motor Control
– Power Supplies
– Battery Packs
SAFETY AND REGULATORY
APPROVALS
• 2.5 KV_RMS for 1 minute per UL 1577
• CSA Component Acceptance Notice 5A
• IEC 60747-5-2 (VDE 0884 Rev. 2)
• IEC 60950-1 and IEC 61010-1 End Equipment
Standards
• All Approvals Pending
DESCRIPTION
ISO7420E, ISO7420FE, ISO7421E and ISO7421FE provide galvanic isolation up to 2.5 KV_RMS for 1 minute per
UL. These devices have two isolated channels. Each channel has a logic input and output buffer separated by a
silicon dioxide (SiO₂) insulation barrier. Used in conjunction with isolated power supplies, these devices prevent
noise currents on a data bus or other circuit from entering the local ground and interfering with or damaging
sensitive circuitry. The suffix F indicates low-output option in fail-safe condition (see Table 1).
These devices have TTL input thresholds and operate from 3V to 5.5V supplies. All inputs are 5V tolerant when
supplied from a 3.3V supply.
ISO7420
D Package
(Top View)
ISO7421
D Package
(Top View)
V_CC1
1
INA 2
INB 3
GND1 4
8
V_CC2
V_CC1
1
7 OUTA OUTA 2
6 OUTB
INB 3
5 GND2 GND1 4
8
V_CC2
7 INA
6 OUTB
5 GND2
1
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Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
DeviceNet is a trademark of Texas Instruments.
2
UNLESS OTHERWISE NOTED this document contains
PRODUCTION DATA information current as of publication date.
Products conform to specifications per the terms of Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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