Search tips
Showing 44 results View by: Thread Post Sort by

  • SN74HC165: QH ouput voltage abnormal

    TI Thinks Resolved
    Part Number: SN74HC165 Hi QH pin of SN74HC165PWT will jump from high level to low level (normally high level). When the input of SN74HC165 parallel port works normally, it is 10K resistance pull-up(CheckD1~D10). Is there any risk of damage to the…

  • SN74HC165: SN74HC165 Input Short to Ground Issue

    TI Thinks Resolved
    Part Number: SN74HC165 Hi, We are using SN74HC165 to read the parallel inputs from field& convert to serial. Attached the circuit for one of the input, such a way all 7-input are connected to SN74HC165. Based on the analysis of field failures, we observed…

  • SN74HC165-Q1: Inquiry about internal block

    TI Thinks Resolved
    Part Number: SN74HC165-Q1 HI team. My customer designed SN74HC165-Q1 without connecting GND. They proceeded to mass production with a mistaken circuit. But, It does operate actually output depending on Input. So, customer has question how did operate without…

  • SN74HC165: SN74HC165 is pulling significant current compared to what datasheet states.

    TI Thinks Resolved
    Part Number: SN74HC165 I'm using the SN74HC165 in my battery operated design. Without powering the SN74HC165, my circuit pulls around 90uA. When I power the SN74HC165, the current jumps around and is not steady. I've seen the current of my design jump…
    • Answered

  • SN74HC165: SN74HC165 . How much load do the CLK and SH/LD pins place on a micro controller, do I need to buffer?

    Resolved
    Part Number: SN74HC165 Other Parts Discussed in Thread: SN74LS04 , SN74LS07 , SN74HC244 Hello. I am currently working on a project which I wish to cascade 20 x SN74HC165 shift registers, thus reading 160 inputs. My concern is, can my micro controller…
    • Resolved

  • SN74HC165-Q1: VIH(max) at Vcc=5V.

    TI Thinks Resolved
    Part Number: SN74HC165-Q1 Other Parts Discussed in Thread: SN74HC165 Hi, team. My customer used SN74HC165-Q1 at Vdd = 5V. But VIH will be over Vcc(about 16~36V). There is no information in the datasheet as shown in the table below. So My customer asked…
    • Answered

  • SN74HC165: request schematic review

    Resolved
    Part Number: SN74HC165 Hello, I'd like to use TI's SN74HC165PW shift register at our network application. I have configured a 16-bit register with TI PISO shift register pair as shown in the attached below. Is there any problem in schematic? …
    • Resolved

  • SN74HC165: Q Output Issue

    TI Thinks Resolved
    Part Number: SN74HC165 Hi, My customer used the 74HC165 as in the following SCH. When using the high value cap for C13, C14, C15 as in the SCH, and add a high signal on the B and D(Other are low level), we found the Q output is wrong as followed: …
    • Answered

  • SN74HC165: QH State on Startup

    Resolved
    Part Number: SN74HC165 I'm using the SN74HC165NSR and upon power up, the QH pin will sometimes read 40 ohms and 1M+ ohms other times in reference to ground. I have a pullup resistor on the QH line which is also attached to a normally open switch. When…
    • Resolved
    • Answered

  • SN74HC165: malfunction depending on rise time clock signal

    Resolved
    Part Number: SN74HC165 Hi, we have malfunction of SN74HC165PW while using it with Vcc=5V, clock-signals of 1kHz and rise time to 50% of Vcc is about 80µs. With rise time to 50% of Vcc of about 9µs it works fine. Is there any requirement for the…
    • Resolved

Didn't find what you are looking for? Post a new question.