TMUX8108PWR - 100V Flat RON 8:1 Analog MUX | Texas Instruments
N.º de pieza: TMUX8108PWR ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $3.2 | $3,20 |
| 10 | $2.88 | $28,80 |
| 100 | $2.56 | $256,00 |
| 500 | $2.3 | $1.150,00 |
| 1.000 | $2.05 | $2.050,00 |
TMUX8108PWR Descripción general
An analog multiplexer is a switching IC that routes one of several analog signal inputs to a single common output under digital control, forming part of the broader family of analog switches within signal-chain and power-management integrated circuits. Multiplexers are essential wherever many sensors, test points, or signal sources share a single downstream amplifier, ADC, or measurement instrument, saving board area, cost, and channel count on data converters.
Key differentiating features of the TMUX8108 include its 100-V maximum supply rating, far above the 36 V ceiling of conventional CMOS multiplexers, its flat RON characteristic that minimizes signal-dependent gain error across the signal range, and latch-up immunity that protects the device in harsh industrial and medical environments where voltage transients are common. Control logic accepts 1.8 V, 3.3 V, and 5 V levels and, according to TI product documentation, logic inputs can be driven as high as 48 V, giving designers exceptional flexibility in interfacing with mixed-voltage systems.
The device supports bidirectional analog and digital signals on the source (Sx) and drain (D) pins and provides break-before-make switching to prevent momentary channel shorting. Consistent analog parametric performance is maintained across the entire supply voltage range, simplifying design reuse from low-voltage to high-voltage systems.
Typical applications include industrial programmable logic controller analog input modules, battery test and formation equipment, medical diagnostic instrumentation front ends, and automated test equipment (ATE) signal routing, all of which benefit from the high supply ceiling and rugged latch-up immunity.
Designers should observe the total supply constraint of 100 V across VDD and VSS and verify signal swing stays within the supply rails; the flat RON makes channel-to-channel matching predictable even at high common-mode voltages.
This page synthesizes verified distributor data, drop-in alternatives, and practical design guidance not found in the manufacturer datasheet, with pricing referenced as of 2026-09-03.
Alternativas directas para TMUX8108PWR — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con TMUX8108PWR (mismo factor de forma y huella) — difiere en Configuration, On-Resistance (RON), Package, Supply Configuration.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
TMUX8108PWR-Q1
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
TMUX8109PWR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ADG5208YRUZ
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MAX14778ATP+T
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MUX508IPWR
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
TMUX8108PWR Valores máximos y características eléctricas
| Función | Single 8:1 analog multiplexer |
| Maximum Supply Voltage | 100 V |
| Supply Configuration | Single, dual, or asymmetric supplies |
| On-Resistance (RON) | 50 ohm (typ, flat across signal range) |
| Logic Compatibility | 1.8 V, 3.3 V, 5 V logic inputs |
| Maximum Logic Input Voltage | 48 V |
| Latch-Up Immunity | Yes |
| Signal Routing | Bidirectional analog and digital on Sx and Dx pins |
| Configuration | Single-ended 8:1 |
| Temperatura de funcionamiento | -40C to +125C |
| Encapsulado | 16-TSSOP (PWR) |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant |
Guía de configuración de pines de TMUX8108PWR 16-tssop (pwr)
Configuración de pines para TMUX8108PWR (encapsulado 16-tssop (pwr)). Este CI digital incluye GPIO, interfaces de comunicación (UART, SPI, I2C) y pines de alimentación. Consulte la hoja de datos del fabricante para conocer las funciones alternativas de los pines y las opciones de configuración. Esencial para el diseño de sistemas embebidos y el diseño de PCB.
No hay datos detallados de patillaje disponibles para TMUX8108PWR.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
TMUX8108PWR es adecuado para 6 aplicacións: Industrial PLC Analog Input Modules, Battery Test and Formation Equipment, Medical Diagnostic Instrumentation, Automated Test Equipment (ATE), Data Acquisition and Sensor Multiplexing, Motor Drive and Power Monitoring Front Ends.
Industrial PLC Analog Input Modules
The TMUX8108PWR fits programmable logic controller (PLC) analog input cards that must multiplex many field sensor signals into a single ADC. Industrial field wiring routinely sees common-mode voltages near 24 V to 48 V and unprotected transient events, which exceed the 36 V ceiling of standard CMOS multiplexers but sit well inside the TMUX8108PWR's 100 V supply rating. Its flat 50 ohm RON keeps channel-to-channel gain errors consistent across all eight inputs, preserving calibration accuracy of the input card without per-channel software correction. The latch-up immunity specification protects the switch against the mis-wiring and surge events common on factory floors. Place the mux directly upstream of a precision ADC driver, use the 1.8 V/3.3 V logic interface from the module microcontroller, and rely on break-before-make switching to prevent momentary shorting of live field channels during transitions.
Recomendado
Battery Test and Formation Equipment
Battery cyclers and formation systems measure cell voltages across stacks that can exceed 48 V, and the TMUX8108PWR's 100 V total supply rating covers these stacks comfortably. The flat 50 ohm RON is critical here: cell-voltage measurement accuracy of a few millivolts demands that switch resistance not vary with the cell's position in the stack, which is exactly what the flat-RON architecture guarantees across the analog range. Bidirectional signal support on the Sx and D pins lets the same channel network serve both measurement and balancing/discharge paths. Latch-up immunity withstands the hot-plug transients that occur when battery packs are connected and disconnected during production test. Route cell taps through the eight source pins to a differential precision ADC, keep a bleed resistor at the mux output so the drain node is defined when a channel is off, and sequence the enable pin with the channel address to guarantee break-before-make behavior.
Recomendado
Medical Diagnostic Instrumentation
Medical diagnostic front ends, including patient-connected measurement systems and in-vitro analyzers, require signal switching that survives defibrillation-level transients and fault conditions; this is the classic use case for the TMUX8108PWR's latch-up immunity. The 100 V supply rating provides wide safety margin over the physiological signal range, while the flat 50 ohm RON maintains a consistent series impedance so bio-potential amplifier gain calibration remains valid across all eight sensor channels. The 1.8 V logic compatibility allows direct control from low-voltage medical-grade microcontrollers without level-shifting circuitry that would add leakage paths in the signal chain. Implement the mux ahead of an instrumentation amplifier, pay attention to off-state leakage when multiplexing high-impedance electrode signals, and use guard rings around the source pins on the PCB to preserve the low-leakage performance required by patient-monitoring accuracy standards.
Recomendado
Automated Test Equipment (ATE)
Automated test equipment routes many test points into a small number of measurement instruments, and the TMUX8108PWR serves as a high-voltage-capable channel selector in these switch matrices. Its 100 V rating allows direct connection to DUT rails that often reach 48 V or higher, eliminating the protective dividers that would otherwise add loading and measurement error. The flat 50 ohm RON introduces a predictable, signal-independent series impedance, which simplifies error budgeting across the full span of measured voltages - a significant advantage over older high-voltage muxes whose RON varies with common mode. The 48 V logic-input tolerance lets address lines come directly from industrial control backplanes. For measurement integrity, characterize the mux's on-resistance and leakage in series with the instrument input impedance, and enable only one channel at a time to prevent DUT channels from shorting through the device.
Recomendado
Data Acquisition and Sensor Multiplexing
In multi-channel data acquisition (DAQ) systems, the TMUX8108PWR lets a single high-resolution ADC sample up to eight sensors, cutting ADC cost and channel-count complexity. The consistent analog parametric performance across the supply range means channel characterization done at one operating point remains valid system-wide, easing calibration of thermocouple, pressure, and strain-gauge inputs that swing widely in common-mode voltage. Because the device routes bidirectional signals on Sx and D pins, the same network can support both sensor excitation routing and signal return paths in ratiometric measurement schemes. The 1.8 V address inputs connect directly to modern low-power MCU GPIOs used in battery-powered loggers. Minimize settling error by allowing adequate acquisition time after each channel switch for the 50 ohm RON plus source impedance RC network to settle, and keep the off-channel source pins AC-grounded via sensor output impedance to reduce crosstalk.
Recomendado
Motor Drive and Power Monitoring Front Ends
High-voltage motor drives and solar/DC bus monitoring systems measure phase voltages, bus voltages, and shunt currents that reference potentials well above ground, often near 48 V or higher. The TMUX8108PWR's 100 V supply ceiling allows the multiplexer to sit directly in these high-common-mode measurement points when powered from an appropriately isolated supply, reducing the number of isolated amplifiers needed. Its latch-up immunity is valuable in drive environments where dv/dt events and inductive kickbacks are routine. The flat 50 ohm RON keeps the error introduced into shunt-measurement paths small and constant. Sample each monitored node through the mux into a delta-sigma or SAR ADC, synchronize channel switching with the PWM cycle to sample at consistent points, and verify that the analog signal range stays within the VDD-VSS rails at all times to avoid conduction through the device's ESD structures.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para TMUX8108PWR — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | TMUX8108PWR-Q1 | TMUX8109PWR | ADG5208YRUZ | MAX14778ATP+T | MUX508IPWR |
|---|---|---|---|---|---|---|
| Package | 16-TSSOP (PWR) | 16-TSSOP (PWR) - same | 16-TSSOP (PWR) - same | 16-TSSOP - same | 16-TSSOP - same | 16-TSSOP (PWR) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices | Analog Devices (Maxim) | Texas Instruments |
| Configuration | Single 8:1 (single-ended) | Single 8:1 | Dual 4:1 (differential) | Single 8:1 | 8:1 multiplexer | Single 8:1 |
Diferenciadores clave
- 100 V total supply rating versus 36 V class alternatives (frente a MUX508IPWR)
- Flat RON architecture versus varying-RON competitors (frente a ADG5208YRUZ)
- Latch-up immunity for harsh environments (frente a TMUX8109PWR)
Notas de diseño
The TMUX8108PWR operates from single, dual, or asymmetric supplies up to 100 V total across VDD and VSS. Estimate: if configured with ±50 V dual rails, the analog signal range must stay within those rails; any signal excursion beyond the supply pins risks conduction through internal protection structures and possible device damage. Power the device from a clean, decoupled supply with at least 100 nF ceramic capacitance directly at VDD/VSS, and sequence supplies so the analog inputs are never energized before the rails are established.
The flat 50 ohm RON is a key accuracy asset, but it is still in series with your signal. Estimated settling time after a channel switch is governed by RON times the source and load capacitance; with a high-impedance sensor and an ADC input of 10 pF, the RC time constant is roughly 0.6 us, so allow several time constants of acquisition time for 16-bit settling. For high-impedance sources, buffer the drain pin with a precision op-amp to isolate the switch capacitance from the converter.
Place the 100 nF VDD decoupling capacitor within 2 mm of the supply pins and use a solid ground plane. Keep the analog source traces (S1-S8) away from the fast digital address lines (A0-A2) to prevent crosstalk-induced glitching during channel transitions; break-before-make switching helps, but layout crosstalk can still couple switching transients into adjacent channels. Guard high-impedance nodes with ground rings to control leakage and crosstalk on precision measurement paths.
Do not exceed 48 V on the logic input pins even though the device tolerates logic up to that level - driving logic pins from a bus without series protection invites damage during transients. Also remember that TMUX8108 is single-ended 8:1; designers needing differential routing should use TMUX8109 instead, since the two parts are not functionally interchangeable despite sharing the family name and package.
Información de cumplimiento
RoHS compliance per standard TI product offering; TMUX8108PWR-Q1 variant available for AEC-Q100 automotive requirements. REACH and halogen-free status not stated in provided data.
