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SN74LS245N

Octal bus transceiver, 3-state, DIR control, LS-TTL, PDIP-20

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Pieza del fabricante：

SN74LS245N

Paquete：

PDIP-20 (24.3 x 6.35 mm, 2.54mm pitch)

Marca：
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Descripción

Productos

The SN74LS245N from Texas Instruments is an octal bus transceiver with 3-state outputs and direction control, designed for asynchronous two-way communication between data buses.

Especificaciones

Fabricante Texas Instruments
Bits 8 (octal)
Direction Control DIR pin
Output Enable Active low (OE)
Retardo de propagación 12 ns typical
Tensión de alimentación 4.75V to 5.25V
Corriente de salida 24 mA sink
Technology 74LS (Low-power Schottky)
Paquete PDIP-20
Temperatura de funcionamiento 0°C to +70°C

Características

  • Octal bidirectional bus transceiver
  • 3-state outputs
  • Direction control (DIR)
  • Output enable (active low)
  • Non-inverting data path
  • Standard LS-TTL logic levels

Aplicaciones

  • Microprocessor bus interface
  • Memory bank switching
  • Data bus buffering
  • Board-level bus isolation

The SN74LS245N from Texas Instruments is an octal bidirectional bus transceiver with 3-state outputs, designed for interfacing two data buses. The DIR pin controls data flow direction, while the active-low OE pin enables or disables all outputs. The non-inverting data path makes it ideal for buffering microprocessor buses, memory interfaces, and I/O port expansion in 5V TTL systems.

The 74LS245 contains eight bidirectional transceiver elements. When OE is LOW and DIR is HIGH, data flows from A to B. When OE is LOW and DIR is LOW, data flows from B to A. When OE is HIGH, both A and B outputs are in high-impedance state, effectively disconnecting the two buses. The LS-TTL Schottky-clamped design provides fast switching with moderate power consumption.

Grupo Pin Nombre Función
1 DIR Direction control
2-9 A1-A8 Bus A I/O
10 GND Suelo
11-18 B8-B1 Bus B I/O
19 OE Output enable (active low)
20 VCC 5V supply
  • Microprocessor data bus buffering
  • Memory interface transceivers
  • I/O expansion board isolation
  • Multi-master bus arbitration
Fabricante Número de pieza Notas
TI SN74HC245N CMOS version (2-6V)
TI SN74LVC245AN 3.3V CMOS version
Nexperia 74HC245D SOIC version
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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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