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NC7SB3257P6X

SPDT bus switch, 1.65-5.5V, 5Ω RON, 0.25ns, MicroPak-6

9125

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Pieza del fabricante：

NC7SB3257P6X

Paquete：

MicroPak-6 (1.45 x 1.0 x 0.5 mm)

Marca：

Categorías de productos：

Circuitos integrados IC, Circuitos integrados de interfaz

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Descripción

Productos

The onsemi NC7SB3257P6X is a single-pole double-throw (SPDT) bus switch in a tiny 6-pin MicroPak package. This 1-bit multiplexer/demultiplexer switch features low on-resistance and low propagation delay, suitable for signal routing and bus isolation in space-constrained applications.

Especificaciones

Configuración	1-bit SPDT (2:1 Mux/Demux)
Tensión de alimentación	1.65 V to 5.5 V
R_EN Max	5 Ω @ 4.5 V
Retardo de propagación	0.25 ns typ
Bandwidth	> 500 MHz
I_CC Max	1 µA
Temperatura de funcionamiento	-55 °C to +125 °C
Paquete	MicroPak-6 (1.45 x 1.0 mm)

Características

Ultra-small MicroPak-6 package (1.45 x 1.0 mm)
Wide supply voltage: 1.65 V to 5.5 V
Low on-resistance: 5 Ω max at 4.5 V
Sub-nanosecond propagation delay
High bandwidth: > 500 MHz
Low power: 1 µA max ICC
I/O tolerant to 5.5 V

Aplicaciones

Signal routing and multiplexing
Bus isolation and switching
Level translation between voltage domains
Portable device signal path management

Introducción del producto:NC7SB3257P6X Presentación del producto

The onsemi NC7SB3257P6X is a single-pole double-throw (SPDT) bus switch designed for signal routing and multiplexing in high-speed, space-constrained applications. The device functions as a 2:1 multiplexer or 1:2 demultiplexer, routing one of two input signals to a common output based on the select (S) pin. With an on-resistance of only 5 Ω maximum at 4.5 V supply and sub-nanosecond propagation delay, it provides near-transparent signal switching with minimal degradation. The wide 1.65 V to 5.5 V supply range supports mixed-voltage designs, and the I/O pins are 5.5 V tolerant, enabling level translation between different voltage domains. The ultra-small MicroPak-6 package (1.45 x 1.0 mm) occupies minimal board space, making it ideal for portable devices and high-density PCBs. The 1 µA maximum supply current ensures negligible power consumption in always-on signal path applications.

Principio de funcionamiento:NC7SB3257P6X Principio de funcionamiento

The NC7SB3257P6X uses a CMOS transmission gate architecture for signal switching. Each switch path consists of a parallel NMOS and PMOS transistor pair (transmission gate) that can pass signals from 0 V to VCC with low and relatively flat on-resistance. The select (S) pin controls which of the two input paths (A or B) is connected to the common output (COM). When S is low, the A-to-COM path is enabled and B-to-COM is high-impedance. When S is high, the B-to-COM path is enabled and A-to-COM is high-impedance. The transmission gate structure ensures that the on-resistance remains approximately constant across the full signal voltage range, unlike a single NMOS or PMOS switch whose resistance varies with signal level. The ultra-fast 0.25 ns propagation delay is achieved by minimizing parasitic capacitance and resistance in the signal path. When disabled, the switch presents a high-impedance state, effectively isolating the signal paths.

Descripción de la clavija:NC7SB3257P6X Definición y funciones de las clavijas

Pin	Nombre	Tipo	Función
1	S	Entrada	Select input (low=A, high=B)
2	A	E/S	Switch input/output A
3	GND	Suelo	Suelo
4	B	E/S	Switch input/output B
5	COM	E/S	Common input/output
6	VCC	Potencia	Supply voltage (1.65-5.5V)

Application Scenarios:In which products and applications isNC7SB3257P6X usado

USB signal routing between host and device
Audio signal path switching in portable devices
I2C/SPI bus multiplexing for shared peripherals
Battery-backed signal isolation in RTC circuits

Alternative Models:What chips are recommended as replacements for NC7SB3257P6X

Fabricante	Número de pieza	Paquete	Notas
TI	SN74LVC1G3157DCKR	SC-70-6	SPDT switch, similar specs
Nexperia	74LVC1G3157GW	SOT-363	SPDT switch, 6-pin
onsemi	FSA3157P6X	MicroPak-6	SPDT switch, very similar
Rohm	BUS1G3157WE2	SSOT-6	SPDT bus switch