SN74LVTH16543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

The 'LVTH16543 devices are 16-bit registered transceivers designed for low-voltage (3.3-V) VCC operation, but with the capability to provide a TTL interface to a 5-V system environment. These devices can be used as two 8-bit transceivers or one 16-bit transceiver. Separate latch-enable (LEAB\\ or LEBA\\) and output-enable (OEAB\\ or OEBA\\) inputs are provided for each register to permit independent control in either direction of data flow. The A-to-B enable (CEAB\\) input must be low to enter data from A or to output data from B. If CEAB\\ is low and LEAB\\ is low, the A-to-B latches are transparent; a subsequent low-to-high transition of LEAB\\ puts the A latches in the storage mode. With CEAB\\ and OEAB\\ both low, the 3-state B outputs are active and reflect the data present at the output of the A latches. Data flow from B to A is similar but requires using the CEBA\\, LEBA\\, and OEBA\\ inputs. Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.When VCC is between 0 and 1.5 V, the devices are in the high-impedance state during power up or power down. However, to ensure the high-impedance state above 1.5 V, OE\\ should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. These devices are fully specified for hot-insertion applications using Ioff and power-up 3-state. The Ioff circuitry disables the outputs, preventing damaging current backflow through the devices when they are powered down. The power-up 3-state circuitry places the outputs in the high-impedance state during power up and power down, which prevents driver conflict. The SN54LVTH16543 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74LVTH16543 is characterized for operation from -40°C to 85°C.

特性 Features

• Members of the Texas InstrumentsWidebusTM Family
• State-of-the-Art Advanced BiCMOS Technology (ABT) Design for 3.3-V Operation and Low Static-Power Dissipation
• Support Mixed-Mode Signal Operation (5-V Input and Output Voltages With 3.3-V VCC)
• Support Unregulated Battery Operation Down to 2.7 V
• Ioff and Power-Up 3-State Support Hot Insertion
• Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors
• Typical VOLP (Output Ground Bounce) CC = 3.3 V, TA = 25°C
• Distributed VCC and GND Pin Configuration Minimizes High-Speed Switching Noise
• Flow-Through Architecture Optimizes PCB Layout
• Latch-Up Performance Exceeds 500 mA Per JESD 17
• ESD Protection Exceeds 2000 V Per MIL-STD-883, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0)
• Package Options Include Plastic Shrink Small-Outline (DL) and Thin Shrink Small-Outline (DGG) Packages and 380-mil Fine-Pitch Ceramic Flat (WD) Package Using 25-mil Center-to-Center Spacings Widebus is a trademark of Texas Instruments Incorporated.