SN74LVTH16501 3.3-V ABT 18-Bit Universal Bus Transceivers With 3-State Outputs | TI.com

SN74LVTH16501 (ACTIVE) 3.3-V ABT 18-Bit Universal Bus Transceivers With 3-State Outputs

3.3-V ABT 18-Bit Universal Bus Transceivers With 3-State Outputs - SN74LVTH16501
Datasheet
 

Description

The ’LVTH16501 devices are 18-bit universal bus 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.

Data flow in each direction is controlled by output-enable (OEAB and OEBA), latch-enable (LEAB and LEBA), and clock (CLKAB and CLKBA) inputs. For A-to-B data flow, the devices operate in the transparent mode when LEAB is high. When LEAB is low, the A data is latched if CLKAB is held at a high or low logic level. If LEAB is low, the A data is stored in the latch/flip-flop on the low-to-high transition of CLKAB. When OEAB is high, the outputs are active. When OEAB is low, the outputs are in the high-impedance state.

Data flow for B to A is similar to that of A to B but uses OEBA, LEBA, and CLKBA. The output enables are complementary (OEAB is active high and OEBA is active low).

Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors with the bus-hold circuitry is not recommended.

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 and OE should be tied to GND through a pulldown resistor; the minimum value of the resistor is determined by the current-sinking/current-sourcing 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.

Features

  • Members of the Texas Instruments
    Widebus™ Family
  • UBT™ Transceiver Combines D-Type
    Latches and D-Type Flip-Flops for
    Operation in Transparent, Latched, or
    Clocked Mode
  • 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
  • Typical VOLP (Output Ground Bounce)
    <0.8 V at VCC = 3.3 V, TA = 25°C
  • Ioff and Power-Up 3-State Support Hot
    Insertion
  • Bus Hold on Data Inputs Eliminates the
    Need for External Pullup/Pulldown
    Resistors
  • Distributed VCC and GND Pins Minimize
    High-Speed Switching Noise
  • Flow-Through Architecture Optimizes PCB Layout
  • Latch-Up Performance Exceeds 500 mA Per JESD 17
  • ESD Protection Exceeds JESD 22
    • 2000-V Human-Body Model (A114-A)
    • 200-V Machine Model (A115-A)

Widebus and UBT are trademarks of Texas Instruments.

Parametrics

Compare all products in Universal bus transceiver (UBT) Email Download to Excel
Part number Order Technology Family VCC (Min) (V) VCC (Max) (V) Channels (#) IOL (Max) (mA) IOH (Max) (mA) ICC @ nom voltage (Max) (mA) Input type Output type Rating Operating temperature range (C) Package Group
SN74LVTH16501 Order now LVT     2.7     3.6     18     64     -32     5     TTL-Compatible CMOS     3-State     Catalog     -40 to 85     SSOP | 56
TSSOP | 56