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74ACT244SCX

Name: 74ACT244SCX
Rating: 4.7 (12 reviews)

IC BUF NON-INVERT 5.5V 20SOIC

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製造商。部分 #74ACT244SCX
包 20-SOIC (0.295, 7.50mm Width)
資料表 74ACT244SCX DataSheet
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規格

Supplier	onsemi
Package	Tape & Reel (TR),Cut Tape (CT)
Series	74ACT
ProductStatus	Active
LogicType	Buffer, Non-Inverting
NumberofElements	2
NumberofBitsperElement	4
OutputType	3-State
Current-OutputHighLow	24mA, 24mA
Voltage-Supply	4.5V ~ 5.5V
OperatingTemperature	-40°C ~ 85°C (TA)
MountingType	Surface Mount
Package/Case	20-SOIC (0.295, 7.50mm Width)

概述

Description

74ACT244SCX is an 8‑bit buffer/line driver with tri‑state outputs from the 74ACT CMOS family. It provides two independent 4‑bit buffers (A‑side and B‑side). Each buffer has inputs (1A0–1A7 and 2A0–2A7) and corresponding outputs (1Y0–1Y7 and 2Y0–2Y7). The outputs can be driven high‑impedance via two active‑low enable pins (/1OE and /2OE). When OE is low, data passes through; when OE is high, the outputs are tri‑stated, allowing bus sharing. Typical supply is 4.5–5.5V; it offers high‑speed CMOS performance with low static power and TTL‑compatible inputs. Use it to buffer and fan‑out signals, isolate buses, or interface logic blocks. The SCX suffix indicates a specific package/temperature variant (e.g., a small‑outline 20‑pin package); check the datasheet for exact pinout and ordering options.

Features

Here are the key features of 74ACT244SCX:
- Octal buffer/line driver with 3-state outputs (8-bit, unidirectional)
- Two 4-bit sections with independent, active-low enables (G1 and G2)
- Non-inverting buffers (A inputs drive Y outputs)
- CMOS 5V operation: typically 4.5V to 5.5V
- TTL-compatible input thresholds
- 3-state outputs for bus interfacing (high impedance when disabled)
- Fast ACT-series performance with low power consumption
- Used for buffering/driving data buses, isolating peripherals, etc.
- Available in SCX packaging (20-pin small-outline/similar SCX variant)

Package

SCX indicates TI’s Small Outline package (SC), i.e., a 20‑pin SOIC with about 0.3" body width; the X suffix denotes tape‑and‑reel packaging.

Pinout

Pin count: 20 pins (DIP/SOIC variants).
Function: SN74ACT244SCX is an octal buffer/line driver with 3-state outputs. It provides eight non-inverting buffers (A0–A7 to Y0–Y7) split into two 4-bit sections, each with an independent enable input (typically active-low). When enables are asserted, outputs follow inputs; when deasserted, outputs go high impedance.

Manufacturer

Manufacturer: Nexperia.
What kind of company: A Dutch multinational semiconductor company that designs and manufactures discrete and logic devices (and related components like MOSFETs) for global electronics markets.

Application

74ACT244SCX is an 8‑bit tri‑state buffer/line driver (two 4‑bit sections) with separate enables. Applications: buffering/driving data and address buses between a microprocessor and memory/peripherals; expanding fan-out; isolating devices on a bus; glue logic and general‑purpose I/O expansion in 5V TTL‑like systems.

Equivalent

The SN74ACT244SCX is an octal buffer/line driver with 3-state outputs. Equivalent devices (same function) from other vendors/families include:
- SN74ACT244 (TI) and generic 74ACT244
- 74AC244, 74AHC244, 74AHCT244, 74HC244, 74HCT244 (CMOS/TTL-compatible variants)
- 74LVC244 (low-voltage CMOS)
Note: check voltage range, speed, and packaging; not all are drop-in replacements in all circuits.