SN54GTL16612 - 18 位 GTL/LVT 通用总线收发器

SN54GTL16612是TI德州仪器公司的一款无产品，SN54GTL16612是18 位 GTL/LVT 通用总线收发器，本站介绍了SN54GTL16612的封装应用图解、特点和优点、功能等，并给出了与SN54GTL16612相关的TI元器件型号供参考。

SN54GTL16612 - 18 位 GTL/LVT 通用总线收发器 - 无 - 背板逻辑器件（GTL/TTL/BTL/ECL收发器/转换器） - 德州仪器

产品描述

The 'GTL16612 devices are 18-bit UBT™ transceivers that provide LVTTL-to-GTL/GTL+ and GTL/GTL+-to-LVTTL signal-level translation. They combine D-type flip-flops and D-type latches to allow for transparent, latched, clocked, and clock-enabled modes of data transfer identical to the '16601 function. The devices provide an interface between cards operating at LVTTL logic levels and a backplane operating at GTL/GTL+ signal levels. Higher-speed operation is a direct result of the reduced output swing (<1 V), reduced input threshold levels, and OEC™ circuitry.

The user has the flexibility of using these devices at either GTL (VTT = 1.2 V and VREF = 0.8 V) or the preferred higher noise margin GTL+ (VTT = 1.5 V and VREF = 1 V) signal levels. GTL+ is the Texas Instruments derivative of the Gunning Transceiver Logic (GTL) JEDEC standard JESD 8-3. The B port normally operates at GTL or GTL+ signal levels, while the A-port and control inputs are compatible with LVTTL logic levels and are 5-V tolerant. VREF is the reference input voltage for the B port.

VCC (5 V) supplies the internal and GTL circuitry while VCC (3.3 V) supplies the LVTTL output buffers.

Data flow in each direction is controlled by output-enable (OEAB\ and OEBA\), latch-enable(LEAB and LEBA), and clock (CLKAB and CLKBA) inputs. The clock can be controlled by the clock-enable (CEAB\ and CEBA\) 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 CEAB\ is low and 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 if CEAB\ also is low. When OEAB\ is low, the outputs are active. When OEAB\ is high, the outputs are in the high-impedance state. Data flow for B to A is similar to that for A to B, but uses OEBA\, LEBA, CLKBA, and CEBA\.

These devices are fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.

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

产品特性

Members of Texas Instruments' Widebus™ Family
UBT™ Transceivers Combine D-Type Latches and D-Type Flip-Flops for Operation in Transparent, Latched, Clocked, or Clock-Enabled Modes
OEC™ Circuitry Improves Signal Integrity and Reduces Electromagnetic Interference
Translate Between GTL/GTL+ Signal Levels and LVTTL Logic Levels
Support Mixed-Mode (3.3 V and 5 V) Signal Operation on A-Port and Control Inputs
Identical to \x9216601 Function
Ioff Supports Partial-Power-Down Mode Operation
Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors on A Port
Distributed VCC and GND Pins Minimize High-Speed Switching Noise
Latch-Up Performance Exceeds 500 mA Per JESD 17

OEC, UBT, and Widebus are trademarks of Texas Instruments.

下面可能是您感兴趣的TI德州仪器公司无元器件

TI公司产品现货专家，订购TI公司产品不限最低起订量，TI芯片大陆现货即时发货，香港库存3-5天发货，海外库存7-10天发货

寻找全球TI代理商现货货源 - TI公司（德州仪器）电子元件在线订购