Features: ` 0-Mbps (DC) to 25 Mbps Signaling Rate
Low Channel-to-Channel Output Skew;
2 ns Max
Low Pulse-Width Distortion (PWD);
2.5 ns Max
` Typical 25-Year Life at Rated Working Voltage (see application note SLLA197 and Figure 11)
` 4000-Vpeak Isolation, 560 Vpeak VIORM
UL 1577 , IEC 60747-5-2 (VDE 0884, Rev 2),
IEC 61010-1 and CSA Approved
` 4 kV ESD Protection
` Operates with 3.3-V or 5-V Supplies
` High Electromagnetic Immunity (see application note SLLA181)
`40 to 125 Operating Range
Application· Flat Plasma Display Panels
· Industrial Fieldbus
· Computer Peripheral Interface
· Servo Control Interface
· Data AcquisitionPinout
Specifications
|
VALUE |
UNIT |
|
VCCSupply voltage(2), VCC1, VCC2 |
0.5 to 6 |
V |
| VIVoltage at IN, OUT, EN |
0.5 to 6 |
V |
| IO Output current |
±15 |
mA |
ESDElectrostatic
discharge |
Human Body Model |
Electrostatic discharge JEDEC Standard
22, Test Method A114-C.01 |
All pins |
±4 |
KV |
| Field-Induced-Charged Device Model |
JEDEC Standard 22, Test Method C101 |
±1 |
| Machine Model |
ANSI/ESDS5.2-1996 |
±200 |
V |
| TJ Maximum junction temperature |
170 |
|
(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) All voltage values are with respect to network ground terminal and are peak voltage values.
DescriptionThe ISO7240CF is a quad-channel digital isolator with an input disable function and a selectable high or low failsafe-output function with the CTRL pin (pin 10). The device has logic input and output buffers separated by TI's silicon dioxide (SiO2) isolation barrier. When used in conjunction with isolated power supplies, the device blocks high voltage, isolates grounds, and prevents noise currents from entering the local ground and interfering with or damaging sensitive circuitry.
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 for more than 4 ms, the input is assumed to be unpowered or not being actively driven, and the failsafe circuit drives the output to the logic state selected by the user.
The failsafe-output is a logic high when a logic-high is placed on the CTRL pin or it is left unconnected. If a logic-low signal is applied to the CTRL pin, the failsafe-output becomes a logic-low output state.
The ISO7240CF also includes an input disable function that prevents data from being passed across the isolation barrier to the output. When the inputs are disabled, the outputs are set by the CTRL pin.
This device may be powered from either 3.3-V or 5-V supplies on either side in any combination. Note that the signal input pins are 5-V tolerant regardless of the voltage supply level being used.
The device is characterized for operation over the ambient temperature range of 40 to 125.
ISO7240CF Data Sheet
