ISO7240CF_10 Datasheet, PDF (1/27 Pages) Texas Instruments – HIGH SPEED QUAD DIGITAL ISOLATORS

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ISO7240CF, ISO7240C, ISO7240M
ISO7241C, ISO7241M
ISO7242C, ISO7242M
SLLS868L – SEPTEMBER 2007 – REVISED JANUARY 2010
HIGH SPEED QUAD DIGITAL ISOLATORS
Check for Samples: ISO7240CF, ISO7240C, ISO7240M, ISO7241C, ISO7241M, ISO7242C, ISO7242M
FEATURES
1
• Selectable Failsafe Output (ISO7240CF)
• 25 and 150-Mbps Signaling Rate Options
– Low Channel-to-Channel Output Skew;
1 ns Max
– Low Pulse-Width Distortion (PWD);
2 ns Max
– Low Jitter Content; 1 ns Typ at 150 Mbps
• Typical 25-Year Life at Rated Working Voltage
(see application note SLLA197 and Figure 17)
• 4000-V_peak Isolation, 560-V_peak V_IORM
– UL 1577 , IEC 60747-5-2 (VDE 0884, Rev 2),
IEC 61010-1, IEC 60950-1 and CSA
Approved
• 4 kV ESD Protection
• Operate With 3.3-V or 5-V Supplies
• High Electromagnetic Immunity
(see application report SLLA181)
• –40°C to 125°C Operating Range
APPLICATIONS
• Industrial Fieldbus
• Computer Peripheral Interface
• Servo Control Interface
• Data Acquisition
DESCRIPTION
The ISO7240, ISO7241 and ISO7242 are quad-channel digital isolators with multiple channel configurations and
output enable functions. These devices have logic input and output buffers separated by TI’s silicon dioxide
(SiO₂) isolation barrier. Used in conjunction with isolated power supplies, these devices block high voltage,
isolate grounds, and prevent noise currents from entering the local ground and interfering with or damaging
sensitive circuitry.
The ISO7240 has all four channels in the same direction while the ISO7241 has three channels the same
direction and one channel in opposition. The ISO7242 has two channels in each direction.
The 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 Vcc/2 input thresholds and do not
have the input noise-filter or the additional propagation delay.
The ISO7240CF has an input disable function on pin 7, and a selectable high or low failsafe-output function with
the CTRL pin (pin 10). 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 input disable function 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.
These devices may be powered from either 3.3-V or 5-V supplies on either side in any 3.3-V / 3.3-V, 5-V / 5-V,
5-V / 3.3-V, or 3.3-V / 5-V combination. Note that the signal input pins are 5-V tolerant regardless of the voltage
supply level being used.
These devices are characterized for operation over the ambient temperature range of –40°C to 125°C.
V_CC1
GND1
IN_A
IN_B
IN_C
IN_D
DISABLE
GND1
ISO7240CF
1
16
2
15
3
14
4
13
5
12
6
11
7
10
8
9
V_CC2 V_CC1
GND2 GND1
OUT_A IN_A
OUT_B IN_B
OUT_C IN_C
OUT_{D IND}
CTRL NC
GND2 GND1
ISO7240
1
16
2
15
3
14
4
13
5
12
6
11
7
10
8
9
V_CC2 V_CC1
GND2 GND1
OUT_A IN_A
OUT_B INB
OUT_C ^INC
OUT_D OUT_D
EN
EN₁
GND2 GND1
ISO7241
1
16
2
15
3
14
4
13
5
12
6
11
7
10
8
9
V_CC2
GND2
OUT_A
OUT_B
OUT_C
IN_D
EN₂
GND2
V_CC1
GND1
IN_A
IN_B
OUT_C
OUT_D
EN₁
GND1
ISO7242
1
16
2
15
3
14
4
13
5
12
6
11
7
10
8
9
V_CC2
GND2
OUT_A
OUT_B
IN_C
IN_D
EN₂
GND2
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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