ISO7420E_1112 Datasheet, PDF (1/25 Pages) Texas Instruments – Low-Power Dual Channel Digital Isolators

ISO7420E, ISO7420FE, ISO7420FCC
ISO7421E, ISO7421FE, ISO7421FCC
www.ti.com
SLLSE45D – DECEMBER 2010 – REVISED DECEMBER 2011
Low-Power Dual Channel Digital Isolators
Check for Samples: ISO7420E, ISO7420FE, ISO7420FCC, ISO7421E, ISO7421FE, ISO7421FCC
FEATURES
1
•2 Signaling Rate > 50 Mbps
• For Devices with Suffix F, Output is Low in
Default 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 (E-Grade)
• Low Pulse Skew: 200 ps Typical (E-Grade)
• Wide T_A Range Specified: –40°C to 125°C
• 50 KV/μs 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
• 3000 V_RMS / 4242 V_PK Isolation per DIN EN
60747-5-2 (VDE 0884 Part 2)
• 2.5 KV_RMS Isolation for 1 minute per UL 1577
• CSA Component Acceptance Notice #5A
• IEC 60950-1 and IEC 61010-1 End Equipment
Standards
• All Agencies Approvals Completed
DESCRIPTION
ISO7420x and ISO7421x provide galvanic isolation up to 2500 V_RMS for 1 minute per UL and 4242 V_PK per VDE.
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 conditions (see Table 1). E-grade devices
have no integrated noise filter and thus have fast propagation delays. CC-grade devices have integrated
10ns-filters for harsh environments where short noise pulses may be present at the device input pins.
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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