TS117S - 350V 1-Form-A OptoMOS Telecom Switch | IXYS
N.º da peça: TS117S ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $2.36 | $2,36 |
| 10 | $2.12 | $21,20 |
| 100 | $1.78 | $178,00 |
| 500 | $1.49 | $745,00 |
| 1.000 | $1.27 | $1.270,00 |
| 3.000 | $1.05 | $3.150,00 |
TS117S Visão geral
An optocoupler (also called an opto-isolator) is a semiconductor device that transfers an electrical signal between two isolated circuits using an internal infrared LED and a photodetector. Solid-state relays (SSRs) replace mechanical relays with MOSFET outputs, providing silent switching, no contact bounce, and orders-of-magnitude longer mechanical life. The TS117S combines both functions into one IC, occupying the role of a galvanically-isolated switch inside the broader hierarchy: SSR -> semiconductor switch -> discrete power semiconductor -> power management component.
Key features include 35 ohm typical on-resistance, <1 mA LED trigger current, 50 pF typical output capacitance, and surge withstand compatible with telecom ringing and on-hook/off-hook transients. The SMD-8 footprint supports automated assembly and reflow soldering, and the device carries 3750 Vrms safety isolation between input and output. The TS117S ships with tin-lead or lead-free (RoHS-compliant) terminal finish options.
The TS117S architecture places an AlGaAs infrared LED on the input side that drives two back-to-back MOSFET output switches on the load side, providing AC/DC switching capability. The lack of moving parts gives unlimited operational cycles and eliminates the acoustic noise of electromechanical relays. Built-in current-limiting and thermal considerations make it robust against inductive kick and short-duration overloads typical of telephone-line transient events.
Typical applications include telecom line-interface cards (SLIC hook-switch / ring-trip / test access), modem and fax line switching, PBX trunk cards, instrumentation multiplexing, and process-control I/O isolation. The compact 8-pin SMD package suits high-density line-card designs where board area is at a premium.
When designing with this part, ensure the LED input current is at least 5 mA for reliable turn-on across temperature, place a 0.1 uF bypass capacitor near the LED anode pin, and verify that the peak load voltage (including ringing transients) never exceeds the 350 V rating. The maximum isolation voltage rating of 3750 Vrms must be observed for safety-compliant creepage and clearance.
This page combines distributor pricing snapshots, drop-in cross-brand alternatives from web cross-reference data, and practical PCB-layout guidance - information not collated on any single manufacturer datasheet.
Alternativas drop-in para TS117S — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com TS117S (mesmo formato e footprint) — diferindo em Package, RoHS Status.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
TS117
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
TS117L
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
TS117S-LF
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
TS117S-R1
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
TS117S Classificações máximas e características elétricas
| Product Type | Solid-State Relay (SSR) with Optocoupler |
| Switch Configuration | 1-Form-A (Normally Open, SPST-NO) |
| Load Voltage (Peak) | 350 V |
| Load Current (Continuous) | 120 mA |
| Load Current (Short Term Pulse) | 300 mA |
| On-Resistance (Typical) | 35 ohm |
| Output Capacitance (Typical) | 50 pF |
| Input-to-Output Isolation Voltage | 3750 Vrms |
| LED Trigger Current (IFT, typical) | 1 mA |
| LED Forward Voltage (VF, typical) | 1.5 V at 10 mA |
| Turn-On Time (Ton, typical) | 1 ms |
| Turn-Off Time (Toff, typical) | 0.5 ms |
| Encapsulamento | 8-Pin SMD (Gull-Wing, 8-SMD) |
| Temperatura de operação | -40C to +85C |
| Tipo de montagem | Surface Mount |
| Terminal Finish | Matte Tin (Sn) |
| Status RoHS | Compliant |
Configuração de pinos do TS117S
| Pino 1 | LED Anode (+) — Input-side LED anode; drive with 5-10 mA forward current through current-limiting resistor |
| Pino 2 | LED Cathode (-) — Input-side LED cathode; connect to input-side ground |
| Pino 3 | NC — Not connected internally; leave floating or tie to input ground |
| Pino 4 | NC — Not connected internally; leave floating or tie to input ground |
| Pino 5 | MOSFET Drain/Source A — Output-side MOSFET terminal A; connect to tip/ring of telecom line |
| Pino 6 | MOSFET Source/Drain B — Output-side MOSFET terminal B; bidirectional AC/DC switching |
| Pino 7 | NC — Not connected internally |
| Pino 8 | NC — Not connected internally |
Aplicações típicas
TS117S é adequado para 6 aplicaçãos: Telecom Line-Interface Card (SLIC Hook-Switch), Modem and Fax Line Switching, PBX Trunk and Extension Switching, Test Equipment and Instrumentation Multiplexing, Industrial Process-Control I/O Isolation, Medical Equipment Signal Routing.
Telecom Line-Interface Card (SLIC Hook-Switch)
The TS117S isolates the SLIC codec from the tip/ring pair in central-office and PBX line cards. Its 350 V peak load rating withstands the -48 V battery feed plus 90 Vrms ringing transients up to 150 V peak, while the 3750 Vrms input-to-output isolation protects the SLIC from surge events and ground-potential differences. The 35 ohm RDS(on) introduces only ~4 V drop at 120 mA loop current, preserving the off-hook detection threshold. Drive the LED from a GPIO or Darlington driver with at least 5 mA forward current for reliable turn-on across the -40C to +85C range.
Recomendado
Modem and Fax Line Switching
In multi-line modem pools and fax-server cards, the TS117S provides silent, bounce-free switching between telephone lines and the modem DSP. The 1 ms typical turn-on time and 0.5 ms turn-off time are fast enough for line-selection multiplexing without audible relay clicks. The optocoupler isolation prevents ground loops between line-side and modem-side grounds, which is critical when multiple carriers or PBX trunks share a backplane. The 8-SMD package is well-suited to high-density line-card designs where 16 or more ports populate a single PCB.
Recomendado
PBX Trunk and Extension Switching
PBX systems use the TS117S to switch trunk lines between extension cards, conferencing modules, and outside-line interfaces. The unlimited mechanical life of the solid-state output (versus ~10^5 cycles for mechanical relays) eliminates a major field-failure mode in 24/7 PBX deployments. The 300 mA short-term pulse rating handles the inrush current of ringing generators and test-access relays. Its compact 8-SMD footprint enables higher port density in 1U PBX chassis where every square centimeter of PCB real estate is allocated.
Recomendado
Test Equipment and Instrumentation Multiplexing
Automatic test equipment (ATE) and bench-top instrumentation use the TS117S to multiplex high-voltage signals between the device-under-test (DUT) and measurement channels. The 3750 Vrms isolation prevents ground loops between floating measurement instruments and the DUT, while the low 50 pF output capacitance minimizes capacitive loading on high-impedance analog signals. The solid-state design eliminates the contact-bounce artifacts that would otherwise corrupt fast edge measurements. Drive the LED through a precision current source for predictable turn-on timing.
Recomendado
Industrial Process-Control I/O Isolation
Industrial PLCs and process-control systems use the TS117S to switch 120/240 VAC discrete signals while keeping the low-voltage logic ground completely isolated from the field wiring. The 350 V peak rating covers both 120 VAC (170 V peak) and 240 VAC (340 V peak) line voltages with margin for transients. The 3750 Vrms isolation meets IEC 61131-2 requirements for industrial control system isolation. The SMD package supports automated SMT assembly on high-volume PLC backplanes where labor cost is a primary design constraint.
Recomendado
Medical Equipment Signal Routing
Patient-monitoring and diagnostic equipment use the TS117S to switch low-level analog signals between isolated patient leads and the acquisition front-end, where patient-safety isolation is mandatory per IEC 60601-1. The 3750 Vrms isolation provides the patient-defibrillation-proof isolation barrier required between applied parts and the equipment chassis. The solid-state design eliminates mechanical-relay failure modes that could leave a patient lead connected during a fault. Drive the LED through a current-limited source to ensure safe operation under all fault conditions.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para TS117S — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | TS117 | TS117L | TS117S-LF | TS117S-R1 |
|---|---|---|---|---|---|
| Brand | IXYS (Littelfuse) | IXYS (Littelfuse) | IXYS (Littelfuse) | IXYS (Littelfuse) | IXYS (Littelfuse) |
| Package | 8-SMD (Gull-Wing) | 8-DIP (through-hole) - DIFFERENT FOOTPRINT | 8-SMD (Gull-Wing) - same | 8-SMD (Gull-Wing) - same | 8-SMD (Gull-Wing) - same |
| Load Voltage (Peak) | 350 V | 350 V | 350 V | 350 V | 350 V |
| Load Current (Continuous) | 120 mA | 120 mA | 120 mA | 120 mA | 120 mA |
| On-Resistance (RDS(on)) | 35 ohm | 35 ohm | 35 ohm | 35 ohm | 35 ohm |
| Input-to-Output Isolation | 3750 Vrms | 3750 Vrms | 3750 Vrms | 3750 Vrms | 3750 Vrms |
| LED Trigger Current (Typical) | 1 mA | 1 mA | 1 mA | 1 mA | 1 mA |
| Current-Limiting Feature | No | No | Yes (L suffix) | No | No |
Principais diferenciais
- Integrated optocoupler + 350 V MOSFET SSR in compact 8-SMD package (vs Discrete optocoupler + discrete MOSFET IRU)
- Surface-mount 8-SMD footprint for high-volume automated assembly (vs TS117 (8-DIP through-hole))
- Low 1 mA typical LED trigger current enables direct GPIO drive (vs Higher-trigger-current competitors (e.g., CPC1030N at 5 mA IFT))
Notas de projeto
Maintain at least 8 mm creepage and clearance between the input-side pins (LED anode/cathode) and the output-side pins (MOSFET drain/source) on the PCB to preserve the 3750 Vrms safety isolation. Place a slot in the PCB under the device if the application requires reinforced isolation per IEC 60747-2. The input-side ground plane and output-side ground plane must be physically separated; do not connect them under the device footprint.
Drive the input LED with a constant-current source of 5-10 mA to ensure reliable turn-on across the full -40C to +85C temperature range. The LED forward voltage is typically 1.5 V at 10 mA; calculate the series resistor as R = (VCC - 1.5 V) / 10 mA. For 3.3 V logic drive, a 180 ohm resistor is typical. For 5 V logic, a 350 ohm resistor. Add a 0.1 uF bypass capacitor across the LED supply to suppress logic-noise-induced jitter on the LED current.
At maximum continuous load of 120 mA and 35 ohm RDS(on), the output MOSFET dissipates approximately 0.5 W. The 8-SMD package thermal resistance (theta_JA) of approximately 100 C/W produces a 50C junction-temperature rise above ambient at full load. This is acceptable for telecom applications where the ambient temperature inside a line-card chassis rarely exceeds 70C. For continuous operation near the maximum current limit, provide thermal copper-pour relief under the output pins.
Do not exceed 350 V peak on the output side, including ringing transients. Telecom tip/ring pairs can ring to 150 V peak during on-hook transitions, and the -48 V battery feed plus transients can reach 100 V peak during off-hook; ensure the sum stays below the 350 V rating with margin. Do not apply reverse voltage exceeding the output MOSFET rating. Do not connect the input-side and output-side grounds together; the device relies on galvanic isolation for safety.
Informações de conformidade
RoHS compliance verified from LCSC and DigiKey product listings. The -LF suffix variant guarantees lead-free terminal finish. Halogen-free status not explicitly stated in the verified data; confirm with Littelfuse for halogen-free certification if required for your application.
