ISO1211
Every spec below is cited to the manufacturer datasheet. Pick your exact ordering code, compare the closest alternatives, then ask the assistant what it means for your design.
What the ISO1211 family does
The ISO1211 and ISO1212 are isolated 24V to 60V digital input receivers compliant to IEC 61131-2 Type 1, 2, and 3 characteristics. These devices support 9V to 300V DC and AC inputs with a wide supply range of 2.25V to 5.5V, handling up to 4Mbps data rates and ±60V input tolerance. The ISO1211 offers a single-channel SOIC-8 package while the ISO1212 provides dual-channel SSOP-16 functionality. They are typically used in programmable logic controller digital input modules, motor drive I/O, position feedback systems, and CNC control applications. Their accurate current limit and high transient immunity simplify system design and reduce board temperatures compared to traditional optocoupler solutions.
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Every number above is cited straight from the datasheet — ask what they mean for your design, and the assistant answers from the same source documents.
Ordering code:
ISO1211 datasheet parameters
| Parameter | Min | Typ | Max | Conditions | Source |
|---|---|---|---|---|---|
| quiescent current | — | 600 µA | 1 mA | ISO1211ISO1212EN = VCC1; icc1; VCC1VOLTAGE SUPPLY | TI datasheet, p. 10 — 5.9 Electrical Characteristics—DC Specification |
| output current | — | — | 4 mA | VCC1 = 5V; iol; 5.3 Recommended Operating Conditions | TI datasheet, p. 5 — 5.3 Recommended Operating Conditions |
| supply voltage range | 2.25 V | — | 5.5 V | vcc1; 5.3 Recommended Operating Conditions | TI datasheet, p. 5 — 5.3 Recommended Operating Conditions |
| operating temperature | -40 °C | — | 125 °C | ta; 5.3 Recommended Operating Conditions | TI datasheet, p. 5 — 5.3 Recommended Operating Conditions |
| power dissipation | — | — | 450 mW | ISO1211 | TI datasheet, p. 6 — 5.5 Power Ratings |
| isolation voltage | — | 2.5 kV | — | TI datasheet, p. 17 — Table 7-1. Device Features | |
| propagation delay | — | 10 ns | 15 ns | Input rise and fall times = 10ns, seeFigure 6-1; tphl; 5.10 Switching Characteristics—AC Specification | TI datasheet, p. 11 — 5.10 Switching Characteristics—AC Specification |
| rise time | — | 3 ns | — | Input rise and fall times = 10ns, seeFigure 6-1; tr; 5.10 Switching Characteristics—AC Specification | TI datasheet, p. 11 — 5.10 Switching Characteristics—AC Specification |
| output voltage low | — | — | 400 mV | VCC1 = 4.5V; IOH = 4mAVCC1 = 3V; IOH = 3mAVCC1 = 2.25V; IOH = 2mA, seeFigure 6-1; vol; LOGIC I/O | TI datasheet, p. 10 — 5.9 Electrical Characteristics—DC Specification |
| cmti | 25 GV/s | 70 GV/s | — | SeeFigure 6-5; cmti; 5.10 Switching Characteristics—AC Specification | TI datasheet, p. 11 — 5.10 Switching Characteristics—AC Specification |
| output count | — | 1 | — | TI datasheet, p. 3 — 4 Pin Configuration and Functions | |
| channel count | — | 1 | — | TI datasheet, p. 17 — Table 7-1. Device Features |
ISO1212 datasheet parameters
| Parameter | Min | Typ | Max | Conditions | Source |
|---|---|---|---|---|---|
| quiescent current | — | 600 µA | 1 mA | ISO1211ISO1212EN = VCC1; icc1; VCC1VOLTAGE SUPPLY | TI datasheet, p. 10 — 5.9 Electrical Characteristics—DC Specification |
| output current | — | — | 4 mA | VCC1 = 5V; iol; 5.3 Recommended Operating Conditions | TI datasheet, p. 5 — 5.3 Recommended Operating Conditions |
| supply voltage range | 2.25 V | — | 5.5 V | vcc1; 5.3 Recommended Operating Conditions | TI datasheet, p. 5 — 5.3 Recommended Operating Conditions |
| operating temperature | -40 °C | — | 125 °C | ta; 5.3 Recommended Operating Conditions | TI datasheet, p. 5 — 5.3 Recommended Operating Conditions |
| power dissipation | — | — | 900 mW | ISO1212 | TI datasheet, p. 6 — 5.5 Power Ratings |
| isolation voltage | — | 2.5 kV | — | TI datasheet, p. 17 — Table 7-1. Device Features | |
| propagation delay | — | 10 ns | 15 ns | Input rise and fall times = 10ns, seeFigure 6-1; tphl; 5.10 Switching Characteristics—AC Specification | TI datasheet, p. 11 — 5.10 Switching Characteristics—AC Specification |
| rise time | — | 3 ns | — | Input rise and fall times = 10ns, seeFigure 6-1; tr; 5.10 Switching Characteristics—AC Specification | TI datasheet, p. 11 — 5.10 Switching Characteristics—AC Specification |
| output voltage low | — | — | 400 mV | VCC1 = 4.5V; IOH = 4mAVCC1 = 3V; IOH = 3mAVCC1 = 2.25V; IOH = 2mA, seeFigure 6-1; vol; LOGIC I/O | TI datasheet, p. 10 — 5.9 Electrical Characteristics—DC Specification |
| cmti | 25 GV/s | 70 GV/s | — | SeeFigure 6-5; cmti; 5.10 Switching Characteristics—AC Specification | TI datasheet, p. 11 — 5.10 Switching Characteristics—AC Specification |
| output count | — | 2 | — | TI datasheet, p. 4 — 4 Pin Configuration and Functions | |
| channel count | — | 2 | — | TI datasheet, p. 17 — Table 7-1. Device Features |
Closest matches to ISO1211
Si8610BB-B-IS
7.5× higher power dissipation, 2.0× lower output voltage low, 1.4× lower cmti
Si8610BC-B-IS
7.5× higher power dissipation, 2.0× lower output voltage low, 1.5× higher isolation voltage
ADuM1200AR
3.3× higher rise time, 2.5× higher quiescent current, 2.0× lower cmti
ADuM1201ARZ
3.3× higher rise time, 2.0× lower cmti, 1.3× lower operating temperature
ISO7240C
11.0× higher power dissipation, 4.5× lower isolation voltage, 1.5× lower rise time
Si8230
6.7× higher rise time, 3.7× lower propagation delay, 3.3× higher quiescent current
ISO1540
5.2× higher power dissipation, 4.4× lower isolation voltage, 3.3× lower propagation delay
ISO7220M
19.5× higher power dissipation, 4.5× lower isolation voltage, 3.7× higher propagation delay
Design help
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