Other Parts Discussed in Thread: SN74LS07 Hello,
My customer uses the SN74LS07, has a question.
He wants to know the input voltage range of Absolute Maximum Ratings,
because the input signal is under GND slightly.
There is only positive voltage value on…
Part Number: SN7407 Other Parts Discussed in Thread: SN7404 , SN74LS07 , SN74LVC07A , Hello,
Im having an issue with the SN7404 IC. The image bellow shows how it is designed. The R7 Resistor Array is used to pull down the 7407 input, so when the CN7 connector…
Hi Art,
The LS09 has a limit of 5.5V at the output. TTL outputs typically only can reach about 2.4V, so a pull-up resistor to 5V is a very significant improvement.
The SN74LS07 has the highest voltage outputs in all of the logic portfolio - they support…
Only logic gates with OE are designed to be able to disable the outputs when the supply voltage is too low.
The SN74LS07 has three diode drops for both the output transistor and the shunt transistor. It might work, but this is not something that is guaranteed…
TEMC,
The VIH for the SN74LS07 is 2V, and hence 3.3V should not be an issue even with the 5V Vcc.
In case, there is no 5V Vcc availability, then we may not have a one chip solution.
Hi Seema,
As per the datasheet specs, this device is not capable of handling voltages greater than 18V( normal ROC) and greater than 20V ( abs max).
You could consider using SN74LS07 open drain device.
With input at 3.3V, the output voltage can be pulled…
Hi Jeff,
The CD40109B-Q1 is not open-drain/open-collector.
I would recommend using the SN74LS07. It requires a 5V supply, but the inputs can be 3.3V and the output can be up to 30V -- and it is open-collector.
Part Number: TXS0108E Other Parts Discussed in Thread: SN74LS07 , SN74LV1T34 Hello,
For our test design, we need to convert varying voltage logic from our DUT (5V to 2.5V) to 3.3V TTL pic microcontroller.
Our DUT cannot drive the two TXS in series that…
Thank you Shreyas.
Your information was very helpful. I did not think of the capacitance issues.
With a total of 200pf for 20 shift registers at 4mhz (my clock speed) this would represent approx 198 ohms of load. At 5 volts this would be around 25ma…
Part Number: SN74LS244 Other Parts Discussed in Thread: SN74LS07 , SN74HC244 [ SN74LS244 ] Start-Up Behavior
Hi, My customer tests the SN74LS244 together with photo couple as drawing below. During their initial evaluation, they have seen unexpected pulse…