SN75176 SN75176BP 75176 Buffers & Line Drivers IC

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Manufacturer: VARIOUS
Manufacturer Part No: SN75176BP
Package / Case: PDIP-8
RoHS: Yes


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SKU A-762
Manufacturer VARIOUS
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  1. Dated, but Tried and True RS-485 Transceiver
    I bought some of these for use in prototypes of a system I have been designing that uses RS-485 for communication. I have not actually used them in application yet, but I thought I'd at least make people aware of what they are getting if they buy these.
    For my application, I initially bought some of TI's SN65HVD12IDREP devices based on some parametric searching. They are not cheap and I bought these SN75176 from Tayda to avoid squandering them.
    You can do a lot with these, but let me list some important limitations and comparisons:
    - It's 5V-only device (my application is 3.3V)
    - You need to provide external fail-safe biasing
    - It uses quite a bit of power even with outputs disabled
    - I *BELIEVE* they are roughly the same speed (the 3.3V device I have has multiple speed options)
    - Similar output current capability
    - Modern ICs present a smaller load (fractional, like 1/8) to the bus, allowing more transceivers to exist on one bus.

    The take-away here is that this is a tried and true device, but being as old as it is, it wastes a lot of quiescent power. I would definitely not use this for battery-powered applications. You also need to remember to include fail-safe biasing externally.

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