• - 交流-直流(AC-DC)控制器和稳压器
• - 直流-直流(DC-DC)控制器、转换器和稳压器
• - 电压和电流管理
• - 通讯IC
• - 驱动器
• - 热管理

• - 时钟及数据分配
• - 标准逻辑

• - 放大器和比较器
• - 模拟开关
• - 数字电位计
• - 接口
• - EMI和RFI滤波器

• - EEPROM存储器
• - 非易失性只读存储器(NVRAM)
• - SRAM存储器

说明

The SN75LBC968 is a nine-channel transceiver with active termination that drives and receives the signals from the single-ended, parallel data buses such as the Small Computer-Systems Interface (SCSI) bus. The features of the line drivers, receivers, and active-termination circuits provide the optimum signal-to-noise ratios for reliable data transmission. Integration of the termination and transceivers in the LinBiCMOS™ process provides the necessary analog-circuit performance, has low quiescent power, and reduces the capacitance presented to the bus over separate termination and I/O circuits.

The transceivers of the SN75LBC968 can be enabled to function as totem-pole or open-drain outputs. The open-drain mode drives the wired-OR lines of SCSI (BSY, SEL, and RST) by inputting the data to the direction control input DE/RE instead of the A input.

特性

• Nine Single-Ended SCSI Transceiver Channels With Active Termination
• Programmable Drivers Provide Active Negation (Totem Pole) or Wired-OR (Open Drain) Outputs
• 24-mA Current-Mode Active Termination With Common Nine-Channel Bus Enable
• Low Output Capacitance Presented to SCSI Bus, 13.5 pF Typ
• 3.3 V Compatible Logic Inputs Provide Bridge from 3 V Controllers to 5 V SCSI Bus
• Designed to Operate at 10-Million Data Transfers Per Second (Fast-SCSI)
• Controlled Driver Rise and Fall Times
       5 ns Min
• High-Receiver Input-Voltage Hysteresis
       500 mV Typ
• Receiver Input-Noise Pulse Filter
       5 ns Typ
• Each Driver and Receiver Meets ANSI X3.131-1994 (SCSI-2) and the Proposed SCSI-3 Standards
• Power-Up/Power-Down Glitch Protection
• High Impedance Driver With V_CC at 0 V

LinBiCMOS is a trademark of Texas Instruments Incorporated.