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74HCT541D

Octal buffer/line driver, 3-state, TTL inputs, SOIC-20

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Pieza del fabricante：

74HCT541D

Paquete：

SOIC-20 / SOT163-1 (12.8×7.5×2.65 mm, 1.27mm pitch)

Descripción

Productos

The 74HCT541D from Nexperia is an octal non-inverting buffer/line driver with 3-state outputs and TTL-compatible input levels in an SOIC-20 package. Two active-LOW output enables (OE1, OE2) control all eight outputs. The data flow-through pinout and 6 mA output drive make it ideal for 5V bus buffering, memory I/O port expansion, and TTL-to-CMOS interface applications.

Especificaciones

Logic Function	Octal non-inverting buffer/line driver, 3-state
Tensión de alimentación	4.5V to 5.5V (HCT)
Retardo de propagación	28 ns max @ 4.5V
Output Drive	±6 mA
Corriente de reposo	160 µA max
Input Levels	TTL (74HCT541)
Output Type	3-state (high-impedance when disabled)
Output Enables	2× active-LOW (OE1, OE2), NOR-gated
Temperatura de funcionamiento	-40°C to +125°C
Paquete	SOIC-20 (SOT163-1, 12.8×7.5 mm)

Características

TTL-compatible input levels for 5V system interfacing
Dual active-LOW output enables (NOR-gated)
Data flow-through pinout for easy PCB layout
6 mA output drive capability
Non-inverting outputs
Input clamp diodes for overvoltage interface
CMOS low power dissipation with TTL inputs

Aplicaciones

5V microprocessor bus buffering with TTL interface
Memory I/O port expansion
TTL-to-CMOS level translation
Backplane and data bus driving in 5V systems

Introducción del producto:74HCT541D Presentación del producto

The 74HCT541D from Nexperia is an octal non-inverting buffer/line driver with 3-state outputs and TTL-compatible input levels in an SOIC-20 package. Dual active-LOW output enables, 6 mA drive, and data flow-through pinout make it ideal for 5V bus buffering, memory I/O port expansion, and TTL-to-CMOS interfacing.

Principio de funcionamiento:74HCT541D Principio de funcionamiento

The 74HCT541D implements eight identical non-inverting buffer channels with 3-state output capability. Each channel passes the input signal to the output without inversion (Yn = An) when enabled. The HCT variant features TTL-compatible input threshold voltages (VIH = 2.0V, VIL = 0.8V), allowing direct interface with 5V TTL outputs from microcontrollers and legacy logic. The two output enable inputs (OE1, OE2) are NOR-gated; if either OE is HIGH, all eight outputs enter high-impedance state. The data flow-through pinout places all inputs (pins 2-9) on one side and all outputs (pins 11-18) on the other, simplifying PCB routing for bus-oriented designs. Input clamp diodes protect against voltages exceeding VCC.

Descripción de la clavija:74HCT541D Definición y funciones de las clavijas

Pin	Nombre	Tipo	Función
1	OE1	Entrada	Output enable 1 (active LOW)
2-9	A0-A7	Entrada	8 data inputs (TTL level)
10	GND	Potencia	Tierra (0V)
11-18	Y0-Y7	Salida	8 data outputs (3-state)
19	OE2	Entrada	Output enable 2 (active LOW)
20	VCC	Potencia	Supply voltage (4.5-5.5V)

Application Scenarios:In which products and applications is74HCT541D usado

5V microprocessor bus buffering with TTL interface
Memory I/O port expansion with 3-state bus sharing
TTL-to-CMOS level translation in mixed 5V systems
Backplane and data bus driving in 5V industrial systems

Alternative Models:What chips are recommended as replacements for 74HCT541D

Fabricante	Número de pieza	Paquete	Notas
Nexperia	74HC541D	SOIC-20	CMOS inputs (2.0-6.0V)
TI	SN74HCT541DW	SOIC-20	Functionally equivalent
ON Semi	MC74HCT541ADWR2G	SOIC-20	Functionally equivalent
Nexperia	74HCT541PW	TSSOP-20	Smaller footprint
Nexperia	74HCT244D	SOIC-20	Same function, split 4+4 enables