SN74HCT245PW

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SN74HCT245PW

IC TXRX NON-INVERT 5.5V 20TSSOP

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規格

Supplier Texas Instruments
Package Tube
Series 74HCT
ProductStatus Active
LogicType Transceiver, Non-Inverting
NumberofElements 1
NumberofBitsperElement 8
OutputType 3-State
Current-OutputHighLow 6mA, 6mA
Voltage-Supply 4.5V ~ 5.5V
OperatingTemperature -40°C ~ 85°C (TA)
MountingType Surface Mount
Package/Case 20-TSSOP (0.173, 4.40mm Width)

概述

Description

The SN74HCT245PW is an 8-bit bidirectional bus transceiver with 3-state outputs from TI. It connects two 8-bit buses (A1–A8 and B1–B8) and transfers data in either direction under a direction control (DIR). An active-low output enable (/OE) puts both sides’ outputs in high-impedance, allowing bus sharing. When DIR = 0, data moves from A to B; when DIR = 1, data moves from B to A. It runs off a single 4.5–5.5 V supply and uses HCT (TTL-compatible) input thresholds. Typical uses include microprocessor/memory interfacing, bus isolation, and interfacing between devices with different bus timings or logic levels on a 5 V system. The PW suffix indicates a specific TI packaging variant (20-pin package). In short: an 8-bit, two-way, 3-state bus transceiver ideal for flexible, low-power 5 V bus bridging.

Features

Here are the key features of the SN74HCT245PW:
- 8-bit bidirectional bus transceiver with 3-state outputs (A0–A7 ↔ B0–B7)
- Direction control input (DIR) to select A→B or B→A data flow
- Output enable input (OE, active low) to place outputs in high-impedance state
- Wide Vcc range: 4.5 V to 5.5 V; TTL/CMOS input compatible (HCT logic)
- Low power consumption
- Suitable for sharing buses between microprocessors, memories, and peripherals
- Package: PW (Plastic DIP) 20-pin device
Optional note: 3-state outputs allow multiple devices on a common bus.

Package

It’s in a 20-pin Plastic DIP (PDIP) package (PW suffix indicates plastic DIP).

Pinout

- Pin count: 20 pins (20-pin package).
- Function: Octal (8-bit) bidirectional bus transceiver with 3-state outputs. It transfers data between two 8-bit buses (A and B) with direction control (DIR) and output enable (/OE) to tri-state the outputs when disabled.

Manufacturer

- Manufacturer: Texas Instruments (TI)
- What kind of company: A multinational American technology company that designs and manufactures semiconductors and integrated circuits (analog and digital ICs).

Application

- 8-bit bidirectional bus transceiver with 3-state outputs.
- Interfaces CPU/microcontroller data and address buses to memory or peripherals.
- DIR and OE control for direction and bus isolation.
- Suitable for multiplexed buses and level/voltage compatibility between 5V and 3.3V devices.
- Common in microprocessor/microcontroller systems, memory interfaces, and peripheral interfaces.

Equivalent

Equivalent parts (8-bit bidirectional bus transceivers, 3-state) from other vendors:
- STMicroelectronics: 74HCT245
- Nexperia (Philips/NXP): 74HCT245
- Onsemi: 74HCT245
- Toshiba: TC74HCT245
- Renesas: μPD74HCT245
All are pin-compatible with SN74HCT245PW.

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