74VHCT244AMTCX

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74VHCT244AMTCX

IC BUF NON-INVERT 5.5V 20TSSOP

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規格

Supplier onsemi
Package Tape & Reel (TR),Cut Tape (CT)
Series 74VHCT
ProductStatus Active
LogicType Buffer, Non-Inverting
NumberofElements 2
NumberofBitsperElement 4
OutputType 3-State
Current-OutputHighLow 8mA, 8mA
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

74VHCT244AMTCX is an 8-bit buffer/line driver with 3-state outputs from the VHCT family. Key points:
- Function: Octal buffer with two 4-bit sections (A1–A4 to Y1–Y4 and A5–A8 to Y5–Y8). Outputs are tri-statable.
- Input/Voltage: TTL-compatible inputs (VHCT) and a 5V supply (typical 4.5–5.5V).
- Enable: Two active-low output-enable pins (OE1 and OE2) to disable/tri-state each group.
- Direction: Unidirectional from A inputs to Y outputs (not a bidirectional transceiver).
- Applications: Buffering and isolating digital signals, level shifting between TTL/CMOS, widening fan-out, microcontroller/microprocessor buses.
- Package: Available in TI’s AMTCX package variant.
This device is useful when you need fast, TTL-compatible buffering with selectable output enable to drive multiple devices without loading the source.

Features

Key features of 74VHCT244AMTCX:
- Octal buffer/line driver with 3-state outputs (8 non‑inverting buffers)
- Two independent 4-bit sections (1–4 and 5–8) with separate output enables
- Active-low enables (OE1, OE2); outputs go high impedance when enabled
- VHCT inputs: TTL-compatible thresholds
- Supply voltage: Vcc = 4.5V to 5.5V
- High-speed CMOS performance with low power consumption
- Suitable for bus driving and interfacing TTL to CMOS
- Package: AMTCX (SMT, 14-pin), RoHS compliant
(Exact propagation delays and drive strength depend on operating conditions; refer to the datasheet for precise figures.)

Package

Package type: 14-pin surface-mount Small-Outline (SOIC) package (M package), RoHS-compliant.

Pinout

- Pin count: 20 pins (20-pin package).
- Function: Octal buffer/line driver with 3-state outputs (two 4-bit buffers). Non-inverting data from A inputs to Y outputs, with two active-low output-enable controls (OE1, OE2) to tri-state the corresponding 4-bit sections. VHCT indicates TTL-compatible input thresholds.

Manufacturer

- Manufacturer: Nexperia (the 74VHCT244AMTCX is a part in their logic/standard IC lineup; Nexperia is the spin-off from Philips/NXP that continues the semiconductor business).
- What kind of company: A global semiconductor company that designs and manufactures standard logic devices, discrete components, and related analog ICs for automotive, industrial, and consumer markets.

Application

74VHCT244AMTCX is an octal buffer/line driver with 3-state outputs. Common applications:
- Buffering/isolating data and address buses in microprocessor/microcontroller systems
- Fan-out expansion to drive multiple devices
- Bus sharing with enable control (tri-state)
- Memory and peripheral interfaces
- Backplane/5V logic line driving
- Improve signal integrity and reduce CPU load on buses

Equivalent

Equivalent parts (same function: octal buffer/8-bit with 3-state outputs, 5V):
- 74VHC244 family: 74VHC244/74VHC244N (NXP), ST, ON Semiconductor, TI counterparts
- 74HC244 family: 74HC244 (NXP, ST, ON Semiconductor, TI)
- 74HCT244 family: 74HCT244 (NXP, ST, ON Semiconductor, TI)
Notes: VHCT vs VHC/HC/HCT differ in input thresholds (TTL-compatible vs CMOS); pinouts are typically compatible.

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