SN74CBT16244C
- Member of the Texas Instruments Widebus™ Family
- Undershoot Protection for Off-Isolation on A and B Ports Up to –2 V
- Bidirectional Data Flow, With Near-Zero Propagation Delay
- Low ON-State Resistance (ron)
- Characteristics (ron = 3
Typical) - Low Input/Output Capacitance Minimizes Loading and Signal Distortion (Cio(OFF) = 5.5 pF Typical)
- Data and Control Inputs Provide Undershoot Clamp Diodes
- Low Power Consumption (ICC = 3 µA Max)
- VCC Operating Range From 4 V to 5.5 V
- Data I/Os Support 0 to 5-V Signaling Levels (0.8-V, 1.2-V, 1.5-V, 1.8-V, 2.5-V, 3.3-V, 5-V)
- Control Inputs Can Be Driven by TTL or 5-V/3.3-V CMOS Outputs
- Ioff Supports Partial-Power-Down Mode Operation
- Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
- ESD Performance Tested Per JESD 22
- 2000-V Human-Body Model (A114-B, Class II)
- 1000-V Charged-Device Model (C101)
- Supports Both Digital and Analog Applications: PCI Interface, USB Interface, Memory Interleaving, Bus Isolation, Low-Distortion Signal Gating
Widebus is a trademark of Texas Instruments.
The SN74CBT16244C is a high-speed TTL-compatible FET bus switch with low ON-state resistance (ron), allowing for minimal propagation delay. Active Undershoot-Protection Circuitry on the A and B ports of the SN74CBT16244C provides protection for undershoot up to –2 V by sensing an undershoot event and ensuring that the switch remains in the proper OFF state.
The SN74CBT16244C is organized as four 4-bit bus switches with separate output-enable (1OE\, 2OE\, 3OE\, 4OE\) inputs. It can be used as four 4-bit bus switches, two 8-bit bus switches, or as one 16-bit bus switch. When OE\ is low, the associated 4-bit bus switch is ON, and the A port is connected to the B port, allowing bidirectional data flow between ports. When OE\ is high, the associated 4-bit bus switch is OFF, and the high-impedance state exists between the A and B ports.
This device is fully specified for partial-power-down applications using Ioff. The Ioff feature ensures that damaging current will not backflow through the device when it is powered down.
To ensure the high-impedance state during power up or power down, 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.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | SN74CBT16244C datasheet (Rev. A) | 2003/10/15 | |||
| 應用說明 | Selecting the Correct Texas Instruments Signal Switch (Rev. E) | PDF | HTML | 2022/6/2 | |||
| 應用說明 | Multiplexers and Signal Switches Glossary (Rev. B) | PDF | HTML | 2021/12/1 | |||
| Application brief | Eliminate Power Sequencing with Powered-off Protection Signal Switches (Rev. C) | PDF | HTML | 2021/1/6 |
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