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SN74HC245DWR

Octal 3-state bus transceiver, 2-6V, 12ns tpd, +/-6mA drive, SOIC-20

6162

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制造商零件：

SN74HC245DWR

包装：

SOIC-20 (12.8 x 10.3 x 2.45 mm)

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说明

产品概览

The SN74HC245DWR from Texas Instruments is an octal bus transceiver with 3-state outputs providing bidirectional data communication between buses. It features direction control, output enable, 12ns propagation delay, and operates from 2V to 6V in a 20-pin SOIC package.

主要规格

功能 Octal Bus Transceiver
渠道 8
电源电压 2V to 6V
传播延迟 12ns (typ)
Output Drive +/-6mA @ 5V
输出类型 3 州
工作温度 -40 to 85 C
包装 SOIC-20

特点

  • Wide operating voltage range: 2V to 6V
  • High-current 3-state outputs drive bus lines directly
  • Low power consumption: 80uA max ICC
  • Typical propagation delay of 12ns
  • Direction control (DIR) and output enable (OE)
  • Non-inverting data path

应用

  • Microprocessor bus interfacing
  • Memory address/data bus buffering
  • Level translation between voltage domains
  • Data acquisition system bus isolation
  • Industrial control bus driving

The SN74HC245DWR from Texas Instruments is an octal bus transceiver with 3-state outputs designed for asynchronous bidirectional communication between data buses. The device allows data transmission from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the direction-control (DIR) input. The output-enable (OE) input can be used to disable the device, effectively isolating the buses. With a wide operating voltage range of 2V to 6V, the device is compatible with both 3.3V and 5V systems. The high-current 3-state outputs can drive bus lines directly or up to 15 LSTTL loads. Low power consumption of 80uA maximum ICC makes it suitable for power-sensitive applications. The device features a typical propagation delay of 12ns and non-inverting data path. It is available in a 20-pin SOIC package rated for -40 to 85 C operation.

The SN74HC245DWR operates as a bidirectional bus switch with tri-state outputs. Key subsystems include: (1) Direction Control Logic – the DIR input selects whether data flows from A-to-B (DIR=HIGH) or B-to-A (DIR=LOW); (2) Output Enable Logic – the active-low OE input controls the 3-state output buffers; when OE is HIGH, all outputs are high-impedance, isolating the buses; (3) Eight Bidirectional Channels – each channel consists of a pair of tri-state buffers with complementary enable logic ensuring only one direction is active at a time; (4) Input Clamp Diodes – provide protection against voltage overshoot and enable interfacing with voltages exceeding VCC through current-limiting resistors. The non-inverting architecture preserves data polarity through the transceiver.

针脚 名称 类型 功能
1 DIR 输入 Direction control (HIGH: A to B, LOW: B to A)
2-9 A1-A8 输入/输出 Bus A data input/output lines
10 接地 地面 Ground connection
11-18 B8-B1 输入/输出 Bus B data input/output lines
19 OE 输入 Output enable (active low)
20 VCC 电源 Power supply (2V to 6V)
  • Microprocessor system bus buffering and bidirectional data transfer
  • Memory interface address/data bus driving
  • Voltage level translation between 3.3V and 5V domains
  • Industrial control system bus isolation and multiplexing
  • Data acquisition front-end bus switching
制造商 部件编号 包装 说明
Nexperia 74HC245D SOIC-20 Pin-compatible equivalent
ON Semiconductor MC74HC245DWG SOIC-20 Pin-compatible equivalent
德州仪器 SN74LVC245APWR TSSOP-20 1.65-3.6V, 24mA drive
Nexperia 74LVC245APW TSSOP-20 Low voltage, higher drive
德州仪器 SN74HCT245DWR SOIC-20 TTL input compatible
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质量保证

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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China

 

发货与付款

Materialparts is a professional global supplier of electronic components with over 20 years of industry experience. We provide one-stop supply of passive components, integrated circuits, as well as parts for industrial control, automotive electronics, consumer electronics and medical devices. Below are the unified shipping and payment policies applicable to all orders, samples and bulk purchases worldwide.

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Contact Information

Email: info@materialparts.com

Tel / WhatsApp: +86 13760382860

服务与包装

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

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Contact Information

For service consultation or packaging customization, please feel free to contact us:
Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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