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6247, 6247CR, 6248

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Info of 6247
Info of 6247CR
Info of 6248

6247, 6247CR, 6248 Selling Leads, Datasheet

MFG:ytlic Package Cooled:VPT20 D/C:N/A

6247, 6247CR, 6248 Datasheet download

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Part Number: 6247

MFG: ytlic

Package Cooled: VPT20

D/C: N/A

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6247 General Description

The LM139 series consists of four independent precision voltage comparators. These were designed specifically to operate from a single power supply over a wide range of voltages. Operation from split power supplies is also possile and the low power supply current drain is independent of the magnitude of the power supply voltage. These comparators also have a unique characteristic in that the input common-mode voltage range includes ground, even though operated from a single power supply voltage.

Application area include limit comparators, simple analog to digital converters, pulse,squarewave and the time delay generators, wide range VCO, MOS clock timers, multivibrators and high voltage digital logic gates. The LM139 series was designed to directly interface with TTL and CMOS. When operated from both plus and minus power supplies, they will directly interface with MOS logic-where the low power drain of the LM339 is a distinct advantage over standard comparators.

6247 Maximum Ratings

Supply Voltage
                                                                       36Vdc or +18Vdc V+
Differential Input Voltage
(Note 5)
                                                                       36V
Output Voltage
                                                                       36V
Input Voltage
                                                                       -0.3V to +36V
Input Current
(Note 6)
     (Vin < -0.3Vdc)                                         50mA
Power Dissipation
(Note 2, 3)
       CERDIP                                                   400mW at TA = 125 C
      CERPACK                                                350mW at TA = 125 C
Maximum Junction Temperature
                                                                     175 C
Output Short-Circuit to GND
(Note 4)
                                                                     Continuous
Storage Temperature Range
                                                                     -65 C to +150 C
Operating Temperature Range
                                                                     -55 C to +125 C
Lead Temperature
   (Soldering, 10 seconds)                            260 C
Thermal Resistance
    ThetaJA
       CERDIP     (Still Air)                               103 C/W
                         (500LF/Min Air flow)             65 C/W
        CERPACK (Still Air                                 183 C/W
                  (500LF/Min Air flow)                    120 C/W
    ThetaJC
     CERDIP                                                  23 C/W
        CERPACK                                                23 C/W
ESD Tolerance
(Note 7)
                                                                      600V
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guranteed specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test conditions.

Note 2: The maximum power dissipation must be derated at elevated temperatures and is dictated by Tjmax (maximum junction temperature), ThetaJA (package junction to ambient thermal resistance), and TA (ambient temperature). The maximum allowable power dissipation at any temperature is Pdmax = (Tjmax -TA/ThetaJA or the number given in the Absolute Maximum Ratings, whichever is lower.

Note 3: The low bias dissipation and the ON-OFF characteristic of the outputs keeps the chip dissipation very small (Pd < 100mW), provided the output transistors are allowed to saturate.

Note 4: Short circuits from the output to V+ can cause excessive heating and eventual destruction. When considering short to ground, the maximum output current is approximately 20mA independent of the magnitude of V+.

Note 5: Positive excursions of input voltage may exceed the power supply level. As long as the other voltage remains within the common-mode range, the comparator will provide the proper output state. The low input voltage state must not be less than -3.0Vdc (or 0.3Vdc below the magnitude of the negative power supply, if used) (at 25 C).

6247 Features

MJLM139-X - Wide supply voltage range 5Vdc to 36Vdc
or +2.5V to +18Vdc
- Very low supply current drain (0.8mA Typ)
independent of supply voltage
- Low input biasing current                                      25nA
- Low input offset current                                        +5nA
and offset voltage                                                 +3mV
- Differential input voltage range
equal to the power supply voltage
- Low output saturation voltage                250mV at 4mA
- Output voltage compatible with TTL,
DTL, ECL, MOS and CMOS logic systems

6248 General Description

The LM140 monolithic 3-terminal positive voltage regulators employ internal current limiting, thermal shutdown and safe-area compensation, making them essentially indestructible. If adequate heat sinking is provided, they can deliver over 0.5A output current. They are intended as fixed voltage regulators in a wide range of applications including local (on-card) regulation for elimination of noise and distribution problems associated with single-point regulation. In addition to use as fixed voltage regulators,these devices can be used with external components to obtain adjustable output voltages and currents.

Considerable effort was expended to make the entire series of regulators easy to use and minimize the number of external components. It is not necessary to bypass the output,although this does improve transient response. Input bypassing is needed only if the regulator is located far from the filter capacitor of the power supply.

6248 Maximum Ratings

DC Input Voltage                                          35V
Internal Power Dissipation
(Note 2)
                                                                     Internally Limited
Maximum Junction Temperature
                                                                     150 C
Storage Temperature Range
                                                                      -65 C to +150 C
Lead Temperature
      Soldering, (10 seconds)                          300 C
Thermal Resistance
     ThetaJA
         (Still Air)                                                 232 C/W
         (500 LF/Min Air Flow)                             77 C/W
        ThetaJC                                                 15 C/W
ESD Susceptibility
(Note 3)
                                                                       2KV
Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur.Operating Conditions are conditions under which the device functions but the specification might not be guaranteed. For guaranteed specifications and test conditions see the Electrical Characteristics.

Note 2: The Maximum allowable power dissipation at any ambient temperature is a function of the maximum junction temperature for operation (TjMAX = 150 C), the junction-to-ambient thermal resistance (ThetaJA), and the ambient temperature (TA).PDMAX = (TjMAX - TA)/ThetaJA. If this dissipation is exceeded, the die temperature will rise above TjMAX and the electrical specifications do not apply. If the die temperature rises above 150 C, the device will go into the thermal shutdown.

Note 3: Human body model, 100pF discharged through 1.5K Ohms

6248 Features

- Output current in excess of 0.5A
- No external components
- Internal thermal overload protection
- Internal short circuit current-limiting
- Output transistor safe-area compensation

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