ISO7221C-HT

Name: ISO7221C-HT
Brand: TI
SKU: ISO7221C-HT
Price: 62.476 USD

ACTIVE

High Temperature Dual Channel, 1/1, 25Mbps Digital Isolator

Order now

Data sheet

document-pdfAcrobat Dual Digital Isolator . datasheet (Rev. A)

ISO7221C-HT

ACTIVE

Data sheet

Order now

Product details

Rating

High Temp

Integrated isolated power

No

Isolation rating

Basic

Number of channels

2

Forward/reverse channels

1 forward / 1 reverse

Default output

High

Data rate (max) (Mbps)

25

Surge isolation voltage (VIOSM) (VPK)

4000

Transient isolation voltage (VIOTM) (VPK)

4000

Withstand isolation voltage (VISO) (Vrms)

2500

CMTI (min) (V/µs)

15000

Operating temperature range (°C)

-55 to 175

Supply voltage (max) (V)

5.5

Supply voltage (min) (V)

2.8

Propagation delay time (typ) (µs)

0.036

Creepage (min) (mm)

4

Clearance (min) (mm)

4

Rating

High Temp

Integrated isolated power

No

Isolation rating

Basic

Number of channels

2

Forward/reverse channels

1 forward / 1 reverse

Default output

High

Data rate (max) (Mbps)

25

Surge isolation voltage (VIOSM) (VPK)

4000

Transient isolation voltage (VIOTM) (VPK)

4000

Withstand isolation voltage (VISO) (Vrms)

2500

CMTI (min) (V/µs)

15000

Operating temperature range (°C)

-55 to 175

Supply voltage (max) (V)

5.5

Supply voltage (min) (V)

2.8

Propagation delay time (typ) (µs)

0.036

Creepage (min) (mm)

4

Clearance (min) (mm)

4

SOIC (D)

8

29.4 mm² 4.9 x 6

1-, 5- and 25-Mbps Signaling Rate Options
- Low Channel-to-Channel Output Skew; 1 ns max
- Low Pulse-Width Distortion (PWD); 1 ns max
- Low Jitter Content; 1 ns Typ at 150 Mbps
4000-V_peak Isolation, 560 V_peak V_IORM
- UL 1577 Approved
- 50-kV/µs Typical Transient Immunity
Operates with 3.3-V or 5-V Supplies
4-kV ESD Protection
High Electromagnetic Immunity

1-, 5- and 25-Mbps Signaling Rate Options
- Low Channel-to-Channel Output Skew; 1 ns max
- Low Pulse-Width Distortion (PWD); 1 ns max
- Low Jitter Content; 1 ns Typ at 150 Mbps
4000-V_peak Isolation, 560 V_peak V_IORM
- UL 1577 Approved
- 50-kV/µs Typical Transient Immunity
Operates with 3.3-V or 5-V Supplies
4-kV ESD Protection
High Electromagnetic Immunity

The ISO7221 is a dual-channel digital isolator. To facilitate PCB layout, the channels are oriented in the opposite directions. This device has a logic input and output buffer separated by TI’s silicon-dioxide (SiO₂) isolation barrier, providing galvanic isolation of up to 4000 V. Used in conjunction with isolated power supplies, this device blocks high voltage, isolates grounds, and prevents noise currents on a data bus or other circuits from entering the local ground and interfering with or damaging sensitive circuitry.

A binary input signal is conditioned, translated to a balanced signal, then differentiated by the capacitive isolation barrier. Across the isolation barrier, a differential comparator receives the logic transition information, then sets or resets a flip-flop and the output circuit accordingly. A periodic update pulse is sent across the barrier to ensure the proper dc level of the output. If this dc-refresh pulse is not received every 4 µs, the input is assumed to be unpowered or not being actively driven, and the failsafe circuit drives the output to a logic high state.

The small capacitance and resulting time constant provide fast operation with signaling rates available from 0 Mbps (dc) to 150 Mbps⁽³⁾. The A-, B- and C-option devices have TTL input thresholds and a noise filter at the input that prevents transient pulses from being passed to the output of the device. The M-option devices have CMOS V_CC/2 input thresholds and do not have the input noise-filter and the additional propagation delay.

This device requires two supply voltages of 3.3 V, 5 V, or any combination. All inputs are 5-V tolerant when supplied from a 3.3-V supply and all outputs are 4-mA CMOS.

The ISO7221 is characterized for operation over the ambient temperature range of –55°C to 175°C.

The ISO7221 is a dual-channel digital isolator. To facilitate PCB layout, the channels are oriented in the opposite directions. This device has a logic input and output buffer separated by TI’s silicon-dioxide (SiO₂) isolation barrier, providing galvanic isolation of up to 4000 V. Used in conjunction with isolated power supplies, this device blocks high voltage, isolates grounds, and prevents noise currents on a data bus or other circuits from entering the local ground and interfering with or damaging sensitive circuitry.

A binary input signal is conditioned, translated to a balanced signal, then differentiated by the capacitive isolation barrier. Across the isolation barrier, a differential comparator receives the logic transition information, then sets or resets a flip-flop and the output circuit accordingly. A periodic update pulse is sent across the barrier to ensure the proper dc level of the output. If this dc-refresh pulse is not received every 4 µs, the input is assumed to be unpowered or not being actively driven, and the failsafe circuit drives the output to a logic high state.

The small capacitance and resulting time constant provide fast operation with signaling rates available from 0 Mbps (dc) to 150 Mbps⁽³⁾. The A-, B- and C-option devices have TTL input thresholds and a noise filter at the input that prevents transient pulses from being passed to the output of the device. The M-option devices have CMOS V_CC/2 input thresholds and do not have the input noise-filter and the additional propagation delay.

This device requires two supply voltages of 3.3 V, 5 V, or any combination. All inputs are 5-V tolerant when supplied from a 3.3-V supply and all outputs are 4-mA CMOS.

The ISO7221 is characterized for operation over the ambient temperature range of –55°C to 175°C.

filter

Find other Digital isolators

Download