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SN3257QPWRQ1

Quad 2:1 mux, AEC-Q100, 1.5Ohm Ron, 300MHz, powered-off prot, TSSOP-16

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Pieza del fabricante：

SN3257QPWRQ1

Paquete：

TSSOP-16 (5.0 x 4.4 x 1.1 mm)

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Descripción

Productos

The SN3257QPWRQ1 from Texas Instruments is an AEC-Q100 qualified quad-channel 2:1 multiplexer/demultiplexer with powered-off protection and fail-safe logic in a TSSOP-16 package. With 1.8V to 5.5V supply range, 1.5Ohm on-resistance, and 300MHz bandwidth, it is designed for automotive signal routing applications.

Especificaciones

Configuración 4-channel 2:1 Mux/Demux (SPDT)
Tensión de alimentación 1.8V to 5.5V
On-Resistance (Ron) 1.5 Ohm (typ @ 5V)
Bandwidth 300 MHz (-3dB)
Charge Injection -5 pC (typ)
Off-Isolation -64 dB @ 10MHz
Powered-Off Protection Yes (I/O high-impedance when VDD=0)
Fail-Safe Logic Yes (select pins tolerant above VDD)
Temperatura de funcionamiento -40 to +125 C
Cualificación AEC-Q100 Grade 1
Paquete TSSOP-16

Características

  • AEC-Q100 Grade 1 qualified for automotive
  • Quad SPDT (4-channel 2:1) multiplexer
  • 1.5Ohm low on-resistance at 5V
  • 300MHz wide bandwidth
  • Powered-off protection (I/O hi-Z when VDD=0)
  • Fail-safe logic pins (tolerate voltages above VDD)
  • 1.8V to 5.5V supply range
  • Bidirectional signal path
  • Break-before-make switching
  • -5pC low charge injection

Aplicaciones

  • Automotive signal routing and sensor multiplexing
  • Battery management system cell monitoring
  • Audio and video signal switching
  • Industrial control signal routing

The SN3257QPWRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified quad-channel 2:1 (SPDT) multiplexer/demultiplexer in a TSSOP-16 package. The Q1 suffix denotes automotive qualification, PWR indicates TSSOP package, and R denotes tape and reel. With 1.5Ohm typical on-resistance at 5V, 300MHz bandwidth, and powered-off protection, it is specifically designed for automotive signal routing. The fail-safe logic feature allows the select pins to be driven by external logic even when VDD is not present, preventing back-powering of the device. The powered-off protection ensures all signal paths become high-impedance when the supply is removed, protecting downstream circuitry.

The SN3257-Q1 operates through four subsystems: (1) Analog Switch Array: Four independent SPDT (single-pole double-throw) analog switches route one of two inputs to a common output per channel. The switches are bidirectional, supporting both multiplexing (2 inputs to 1 output) and demultiplexing (1 input to 2 outputs). (2) Digital Control: Two select pins (S0, S1) control all four channels simultaneously. When S=0, the normally-closed (NC) path is selected; when S=1, the normally-open (NO) path is selected. An enable pin (EN) can force all switches open. (3) Powered-Off Protection: When VDD = 0V, an internal circuit detects the absence of power and forces all I/O pins to a high-impedance state, preventing current flow from signal sources through the device. (4) Fail-Safe Logic: The select and enable inputs have special circuitry that tolerates voltages above VDD, preventing parasitic conduction when control signals are present before power is applied.

Pin Nombre Tipo Descripción
1 1IN1 Analógico Channel 1, input 1 (NC path)
2 1IN2 Analógico Channel 1, input 2 (NO path)
3 2IN1 Analógico Channel 2, input 1 (NC path)
4 2IN2 Analógico Channel 2, input 2 (NO path)
5 ES Entrada Enable (active low)
6, 7 S0, S1 Entrada Select inputs (fail-safe)
8 GND Potencia Suelo
9-12 D1-D4 Analógico Channel outputs
13 4IN2 Analógico Channel 4, input 2 (NO path)
14 4IN1 Analógico Channel 4, input 1 (NC path)
15 3IN2 Analógico Channel 3, input 2 (NO path)
16 VDD Potencia Supply voltage (1.8-5.5V)
  • Automotive BMS cell voltage multiplexing with powered-off protection preventing battery drain
  • Sensor signal routing in automotive ECUs with AEC-Q100 Grade 1 reliability
  • Audio signal source selection with 300MHz bandwidth and -5pC low charge injection
  • Redundant signal path switching with fail-safe logic tolerating hot-swap scenarios
Modelo Fabricante Canales Ron Notas
TS5A3359QRTERQ1 TI 5:1 10Ohm 5-channel mux
NC7SB3157P6X onsemi 1 1Ohm Single SPDT
ADG732BCPZ ADI 32:1 4Ohm High channel count
SN3257PW TI 4 1.5Ohm Non-auto grade
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