My Inquiry
My Account
STMicroelectronics LCP154DJF
- Part No.:
- LCP154DJF
- Manufacturer:
- STMicroelectronics
- Category:
- Thyristors
- Package:
- 8-PowerVDFN
- Datasheet:
-
LCP154DJF.pdf
- Description:
- THYRISTOR 400A 8-POWERVDFN
- Quantity:
- Payment:
- Shipping:
Inventory:7,495
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LCP154DJF from STMicroelectronics is a programmable transient voltage suppressor (Trisil™) designed for SLIC protection in telecom line interface circuits. It features a wide negative firing voltage range (VGn = −175 V max), low dynamic switching voltages (VFP = 7 V, VDGL = 12 V at 150 A, 10/700 µs), and peak pulse current capability up to 500 A (2/10 µs). It is used to protect high-voltage SLICs against lightning and surge transients per ITU-T K20/K21/45 and GR-1089-Core standards.
For engineers reviewing the LCP154DJF datasheet, LCP154DJF pinout, LCP154DJF application, or LCP154DJF equivalent, this device is selected for robust, fail-safe overvoltage clamping in telecom line cards where precise negative threshold control, low dynamic clamping, and UL497B/UL94 V0 compliance are required.
Technical Context
The LCP154DJF implements a dual-thyristor crowbar structure referenced to −VBAT via gate terminals, enabling programmable negative surge suppression while positive transients are clamped by integrated diodes. Its gate-triggered firing mechanism ensures precise breakdown control independent of temperature drift.
It operates as a bidirectional line protector with separate Tip–GND and Ring–GND terminal pairs, each rated for simultaneous 100 A (10/1000 µs) pulses. The device maintains stable holding current (IH ≥ 150 mA) across −55 °C to +150 °C junction temperature, supporting fail-safe short-circuit mode during sustained overvoltage events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VGn (Max) | −175 V - Sets maximum negative battery-referenced breakdown threshold for SLIC protection. |
| VFP (Typ) | 7 V @ 150 A, 10/700 µs - Forward peak clamping voltage limiting SLIC input stress during fast surges. |
| VDGL (Typ) | 12 V @ 150 A, 10/700 µs - Dynamic gate-to-line switching voltage defining turn-on speed under surge. |
| IPP (Max) | 500 A @ 2/10 µs - Peak pulse current handling for lightning-level transients without degradation. |
| IH (Min) | 150 mA - Minimum holding current ensuring reliable latching and fail-safe short-circuit behavior. |
| C (Typ) | 35 pF @ −50 V, 1 MHz - Low line-to-ground capacitance preserving signal integrity on analog telecom lines. |
| CG (Typ) | 100 nF - Gate decoupling capacitance value required to accelerate crowbar firing for fast-edge surge suppression. |
Pinout & Package
Package: PowerFLAT™ 5×6 (5.0–5.4 mm × 5.95–6.35 mm, 0.8–1.0 mm height), UL94 V0 epoxy, surface-mount, thermally enhanced with exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Tip | Line-side anode of negative thyristor & cathode of positive diode | Primary surge path for Tip–GND transients; connects to SLIC Tip input. |
| Ring | Line-side anode of second negative thyristor & cathode of second positive diode | Primary surge path for Ring–GND transients; connects to SLIC Ring input. |
| GND | Common reference for both thyristors and diodes | System ground return; carries combined surge current when both Tip and Ring are stressed simultaneously. |
| Gate | Control terminal for negative thyristor breakover | Battery-referenced trigger node; sets VGn threshold and enables programmability via external −VBAT connection. |
Key Features
| Feature | Design Value |
|---|---|
| Fail-safe short-circuit mode | Guaranteed latching and self-sustaining conduction after triggering, eliminating reliance on external crowbar drivers. |
| Programmable negative breakdown | VGn adjustable up to −175 V via external −VBAT rail, enabling compatibility with diverse SLIC supply architectures. |
| Low dynamic clamping | VFP = 7 V and VDGL = 12 V minimize voltage overshoot at SLIC inputs during 10/700 µs surges. |
| UL497B & UL94 V0 certified | Meets telecom surge safety (UL497B E136224) and flammability (UL94 V0) requirements for end-equipment certification. |
| Simultaneous dual-line rating | Supports full-rated 100 A (10/1000 µs) on both Tip–GND and Ring–GND paths concurrently without derating. |
Applications
| DSL Line Card Protection | VoIP Gateway Surge Suppression |
|---|---|
Use Scenario: Protecting ADSL/VDSL line interface ICs from lightning-induced surges on copper twisted-pair lines. IC Role / Device Role / Timing Role: Crowbar-type transient suppressor clamping negative surges referenced to −48 V battery rail and clamping positive surges via internal diodes. Use Value: Enables compliance with ITU-T K21 and GR-1089 Core first-level surge tests (2500 V, 100 A, 2/10 µs) without external active circuitry. | Use Scenario: Securing analog telephone interface (FXS/FXO) ports in enterprise VoIP gateways against TIA-968-A lightning surges. IC Role / Device Role / Timing Role: Bidirectional line protector with programmable negative threshold, operating in parallel with Cooper Bussmann TCP 1.25 A fuse. Use Value: Delivers fail-safe short-circuit behavior meeting UL60950 and CSA C22.2 safety standards without aging-related performance drift. |
| Central Office SLIC Protection | ISDN BRI Line Interface |
Use Scenario: Safeguarding high-voltage SLICs in carrier-grade central office line cards against intra-building surges (1500 V, 100 A, 2/10 µs). IC Role / Device Role / Timing Role: Gate-triggered thyristor array providing precise −VBAT-referenced breakdown and low VFP clamping for analog voice channels. Use Value: Maintains <35 pF line-to-ground capacitance to preserve high-frequency DSL signal integrity while delivering 500 A (2/10 µs) surge immunity. | Use Scenario: Protecting ISDN Basic Rate Interface (BRI) S/T interface transceivers from differential-mode surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Dual-path transient suppressor with independent Tip/Ring terminals, enabling symmetric protection of 2B+D digital voice/data lines. Use Value: Supports simultaneous 100 A surge on both Tip and Ring with GND current doubling-critical for balanced ISDN line reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable transient suppressor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SLVU2.8-4 | Unidirectional TVS array (2.8 V clamp), no gate control or programmability; lower surge rating (30 A, 8/20 µs). | Designed for low-voltage data lines (USB, Ethernet), not SLIC battery-referenced protection. | Select only for non-battery-referenced, low-energy digital interfaces-not a functional replacement for LCP154DJF. |
| TISP4240H3BJR-S | Fixed −240 V negative breakdown, no gate programming; higher VFP (15 V) and larger package (SO-8). | Targets legacy POTS line cards with fixed −48 V systems; lacks flexibility for modern HV-SLIC designs. | Choose when gate programmability is unnecessary and higher negative threshold suffices; requires PCB redesign due to SO-8 footprint. |
Compared with SLVU2.8-4 and TISP4240H3BJR-S, the LCP154DJF uniquely combines gate-programmable negative breakdown, dual-path 100 A surge rating, and PowerFLAT 5×6 thermal performance-making it irreplaceable for next-generation programmable SLIC protection where threshold adaptability and compact layout are mandatory.
Availability
LCP154DJF is available at Aetrix Electronics and suitable for DSL line cards, VoIP gateways, central office SLIC modules, and ISDN BRI interfaces requiring stable component supply, long-lifecycle support, and UL-certified surge protection.
Supply support for LCP154DJF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader specializing in power management, analog, MEMS, and automotive ICs, with manufacturing and R&D operations across Europe, Asia, and the Americas.
The LCP154DJF belongs to ST's Trisil™ programmable transient suppressor product line, engineered specifically for telecom line interface protection where fail-safe crowbar action, battery-referenced threshold control, and regulatory compliance (ITU-T, GR-1089, UL497B) are critical.
FAQ
What is the function of the Gate pin on LCP154DJF?
The Gate pin sets the negative breakdown voltage (VGn) by referencing to the −VBAT supply rail. It enables programmable triggering of the internal thyristors, allowing precise adaptation to different SLIC battery voltages (e.g., −48 V or −72 V systems) without changing the device part number.
Does LCP154DJF require an external fuse? If so, which one is specified?
Yes-ST specifies the Cooper Bussmann Telecom Circuit Protector fuse TCP 1.25 A for coordinated protection. This fuse provides time-delayed overcurrent interruption after LCP154DJF triggers, preventing thermal damage while maintaining fail-safe short-circuit operation during surge events.
Can LCP154DJF be used for positive-only surge protection?
No-it is inherently bidirectional. Positive surges are clamped by internal diodes; negative surges are suppressed by gate-controlled thyristors. Its architecture requires connection to both Tip and Ring lines and a −VBAT reference; using it for unidirectional protection would leave one conduction path inactive and violate its design intent.
How does LCP154DJF achieve UL497B certification?
LCP154DJF achieves UL497B certification through its fail-safe short-circuit mode, UL94 V0 epoxy packaging, validated surge performance per TIA-968-A and ITU-T K20/K21, and documented coordination with TCP 1.25 A fuse. Certification file E136224 confirms compliance for primary circuit protection in telecom equipment.
LCP154DJF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 8-PowerVDFN
- Series:
- LCP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Breakover:
- -
- Voltage - Off State:
- -
- Voltage - On State:
- -
- Current - Peak Pulse (8/20µs):
- 400 A
- Current - Peak Pulse (10/1000µs):
- 100 A
- Current - Hold (Ih):
- 150 mA
- Number of Elements:
- 1
- Capacitance:
- 35pF
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PowerFlat™ (5x6)
LCP154DJF FAQ
1.How can I place an order for LCP154DJF through Aetrix?
Please submit a Request for Quotation (RFQ) for LCP154DJF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LCP154DJF reliable?
The price and inventory of LCP154DJF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LCP154DJF is usually 5 days.
3.What payment methods are accepted for LCP154DJF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LCP154DJF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LCP154DJF?
LCP154DJF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LCP154DJF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LCP154DJF?
For technical support, including LCP154DJF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LCP154DJF requirements.
6.How does Aetrix verify that LCP154DJF is sourced from the original manufacturer or authorized distributors?
All LCP154DJF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LCP154DJF meets industry standards.
7.What is the process for return or replacement of LCP154DJF?
All LCP154DJF units undergo pre-shipment inspection (PSI). If there is an issue with LCP154DJF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LCP154DJF part is unused and in its original packaging.
Return procedure for LCP154DJF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LCP154DJF Tags
-
TISP4015L1AJR-S
Bourns Inc.
-
TISP4015L1BJR-S
Bourns Inc.
-
SMP100LC-270
STMicroelectronics
-
TISP4240M3BJR-S
Bourns Inc.
-
SMP100LC-35
STMicroelectronics
-
SMP100LC-65
STMicroelectronics
-
SMP100LC-8
STMicroelectronics
-
TISP4P035L1NR-S
Bourns Inc.
-
TISP4350H3BJR-S
Bourns Inc.
-
TISP4011H1BJR-S
Bourns Inc.
-
SMP100LC-400
STMicroelectronics
-
P0300SALRP
Littelfuse Inc.
Tech Hub
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
