74LVT16543ADL数据手册集成电路（IC）的缓冲器驱动器接收器收发器规格书PDF

描述 Description

3.3V LVT 16-bit registered transceiver (3-State) - The 74LVT16543A is a high-performance BiCMOS product designed for Vcc operation at 3.3V. The device can be used as two 8-bit transceivers or one 16-bit transceiver. The 74LVT16543A contains two sets of eight D-type latches, with separate control pins for each set. Using data flow from A to B as an example, when the A-to-B Enable (nEAB) input and the A-to-B Latch Enable (nLEAB) input are Low, the A-to-B path is transparent. A subsequent Low-to-High transition of the nLEAB signal puts the A data into the latches where it is stored and the B outputs no longer change with the A inputs. With nEAB and nOEAB both Low, the 3-State B output buffers are active and display the data present at the outputs of the A latches. Control of data flow from B to A is similar, but using the nEBA, nLEBA, and nOEBA inputs. Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.

特性 Features

·16-bit universal bus interface
·3-State buffers
·Output capability: +64 mA / -32 mA
·TTL input and output switching levels
·Input and output interface capability to systems at 5 V supply
·Bus-hold data inputs eliminate the need for external pull-up resistors to hold unused inputs
·Live insertion/extraction permitted
·Power-up 3-State
·Power-up reset
·No bus current loading when output is tied to 5 V bus
·Latch-up protection exceeds 500 mA per JEDEC Std 17
·ESD protection exceeds 2000 V per MIL STD 883 Method 3015 and 200 V per Machine Model