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onsemi 74F1071SC
- Part No.:
- 74F1071SC
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74F1071SC.pdf
- Description:
- TVS DIODE 5VWM 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:8,074
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Product details
Overview
74F1071SC from Fairchild Semiconductor is an 18-bit undershoot/overshoot clamp and ESD protection device in a 20-lead SOIC package. It provides bidirectional voltage clamping at –0.5 V (undershoot) and +7.0 V (overshoot), features 25 pF input capacitance at 0 V bias, supports 5 V CMOS/TTL buses, and delivers ±10 kV HBM ESD protection for signal line safeguarding in high-speed digital interfaces.
For engineers reviewing the 74F1071SC datasheet, pinout, applications, or equivalent options, this device serves as a dedicated bus-level transient suppressor with low-capacitance, dual-ground-pin layout, and FAST® bipolar clamping architecture optimized for ASIC I/O port protection in industrial and computing systems.
Technical Context
The 74F1071SC implements discrete bipolar diode clamping networks per channel-each input pair connects to dedicated forward and reverse clamp paths referenced to dual center ground pins (pins 10 and 11). Its clamping thresholds are fixed by internal junction characteristics, not programmable or adjustable.
It operates exclusively in passive protection mode-no enable/disable control, no power supply required, and no signal conditioning beyond voltage limiting. The device functions only under overvoltage stress and presents minimal loading (13 pF at 5 V bias) during normal 0–5 V signal swing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Clamping Voltage (Undershoot) | –0.5 V nominal; limits negative excursions below GND to prevent latch-up in 5 V CMOS inputs |
| Clamping Voltage (Overshoot) | +7.0 V nominal; clamps positive transients above VCC to protect downstream logic |
| Input Capacitance | 25 pF @ 0 V bias; ensures minimal signal integrity impact on ≤50 MHz digital buses |
| ESD Rating (HBM) | ±10 kV; meets MIL-STD-883D method 3015.7 for robust handling in assembly and field use |
| Package | SOIC-20 (JEDEC MS-013, 0.300" wide); compatible with standard surface-mount reflow profiles |
| Thermal Resistance θJA | 100 °C/W; enables operation up to +70 °C ambient without derating in typical PCB layouts |
Pinout & Package
74F1071SC is housed in a 20-lead Small Outline Integrated Circuit (SOIC) package per JEDEC MS-013, 0.300" wide, with gull-wing leads and dual center ground terminals for minimized inductance in high-frequency transient suppression.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–9, 12–20 | Input/Output Clamp Channels | 18 bidirectional signal lines (pins 1–9 and 12–20), each with independent undershoot/overshoot clamping |
| 10, 11 | Ground (GND) | Dual center ground pins reduce common-impedance coupling and improve clamping response symmetry |
Key Features
| Feature | Design Value |
|---|---|
| 18-bit array structure | Single-package solution for full 18-line parallel bus protection-reduces board space vs. discrete diode arrays |
| FAST® Bipolar clamping | Sub-nanosecond response time enabled by silicon bipolar junction design-not dependent on RC delay or external bias |
| Dual center ground pins | Low-inductance return path minimizes ground bounce during simultaneous multi-line ESD events |
| Low input capacitance | 13 pF at 5 V bias preserves signal edge rate and timing margin on 5 V TTL/CMOS data and address buses |
Applications
| Industrial Control Backplane | PCI Bus Interface Protection |
|---|---|
Use Scenario: Protecting FPGA configuration and status lines connected to modular I/O backplanes exposed to relay switching noise and cable discharge. IC Role / Device Role / Timing Role: Passive voltage clamp placed directly at connector entry point to limit transients before reaching sensitive logic. Use Value: Prevents cumulative gate oxide damage from repeated ±1 kV contact discharges while maintaining <1 ns clamping latency. |
Use Scenario: Safeguarding PCI slot data/address lines against ESD events during hot-plug insertion and system-level EMI coupling. IC Role / Device Role / Timing Role: Line-level transient suppressor mounted adjacent to edge connector, operating without power or control signals. Use Value: Enables compliance with IEC 61000-4-2 Level 4 (±8 kV contact) using single-component placement per 18-bit bus segment. |
| ASIC User Port Protection | Embedded System Expansion Connector |
Use Scenario: Shielding custom ASIC I/O pins on user-accessible ports subject to accidental human touch and tool-induced static discharge. IC Role / Device Role / Timing Role: Frontline ESD barrier between external interface and core logic, leveraging fixed –0.5 V / +7.0 V clamping thresholds. Use Value: Eliminates need for external series resistors or RC filters-preserves DC logic levels and AC signal fidelity. |
Use Scenario: Securing expansion headers on ARM-based industrial controllers where add-on modules introduce uncontrolled grounding paths. IC Role / Device Role / Timing Role: Undershoot/overshoot limiter for GPIO, UART, and SPI lines routed to external connectors. Use Value: Maintains 13 pF capacitance at 5 V bias to avoid skew or rise-time degradation on 10–25 MHz peripheral interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar undershoot/overshoot clamp and ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1T45DBVR | Level-shifting transceiver with integrated ESD protection (±8 kV HBM), but no dedicated undershoot clamping below GND | Requires VCCA/VCCB bias; unsuitable for passive bus termination or zero-power fail-safe operation | Select only when level translation is required alongside basic ESD hardening-not a direct functional replacement |
| TPD2E001DRSR | 2-channel ESD protector with 10 pF capacitance and ±8 kV HBM, but limited to 5.5 V max working voltage and no undershoot clamping | Designed for USB/low-voltage I/O; lacks dual-ground architecture and 18-bit scalability | Use for point-of-use protection on individual high-speed lines-not for parallel bus-wide suppression |
Compared with SN74LVC1T45DBVR and TPD2E001DRSR, the 74F1071SC uniquely delivers simultaneous –0.5 V undershoot and +7.0 V overshoot clamping across 18 channels in a single SOIC package without power rails-making it irreplaceable for legacy 5 V bus architectures requiring robust, passive, multi-line transient suppression.
Availability
74F1071SC is available at Aetrix Electronics and suitable for industrial control backplanes, PCI interface designs, and ASIC user port protection requiring stable component supply and long-term obsolescence management.
Supply support for 74F1071SC 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
Fairchild Semiconductor was a U.S.-based semiconductor manufacturer specializing in analog, power, and interface solutions before its acquisition by ON Semiconductor in 2016.
The 74F1071SC belongs to Fairchild's FAST® family of transient protection devices, engineered specifically for passive, low-capacitance clamping of 5 V digital buses in industrial and computing infrastructure.
FAQ
What is the primary function of the 74F1071SC?
The 74F1071SC is an 18-bit undershoot/overshoot clamp and ESD protection device that actively limits voltage excursions on digital signal lines to –0.5 V (below ground) and +7.0 V (above ground). It requires no external power, operates passively during transients, and is designed to protect 5 V CMOS/TTL interfaces from electrical overstress caused by ESD or switching noise-making it essential for reliable bus-level protection in industrial and computing systems where the 74F1071SC is deployed.
Does the 74F1071SC require a power supply to operate?
No, the 74F1071SC operates entirely passively and does not require any power supply connections. Its clamping action relies solely on internal bipolar junction diodes that conduct only during overvoltage conditions. This zero-power operation ensures fail-safe protection-even during system power loss-and eliminates design complexity associated with biasing or enable logic, a key advantage of the 74F1071SC in safety-critical or always-on interface applications.
What is the input capacitance of the 74F1071SC and how does it affect signal integrity?
The 74F1071SC exhibits 25 pF input capacitance at 0 V bias and 13 pF at 5 V bias, measured at 1 MHz. This low, voltage-dependent capacitance minimizes loading on 5 V digital buses, preserving signal rise/fall times and timing margins on interfaces up to 50 MHz. Because the 74F1071SC places capacitance directly at the I/O pin, its predictable parasitic profile simplifies SI analysis-unlike discrete capacitor-diode combinations where layout-dependent strays dominate.
How does the dual ground pin configuration (pins 10 and 11) improve performance of the 74F1071SC?
The dual center ground pins (10 and 11) in the 74F1071SC reduce shared impedance and inductance in the return path during multi-line ESD events. This configuration ensures symmetrical clamping response across all 18 channels and prevents ground bounce from propagating between protected lines-critical for maintaining signal integrity on tightly spaced parallel buses. The physical placement and low-inductance layout directly enhance the real-world effectiveness of the 74F1071SC in high-noise industrial environments.
Is the 74F1071SC compatible with modern RoHS-compliant manufacturing processes?
Yes, the 74F1071SC is lead-free and complies with JEDEC J-STD-020B standards for moisture sensitivity and reflow compatibility. Its SOIC package supports standard Pb-free reflow profiles (peak temperature ≤260 °C), and the device has been qualified for industrial temperature operation (0 °C to +70 °C ambient). As a mature Fairchild part, the 74F1071SC remains viable for legacy-compatible production runs where long-term supply stability and process familiarity are prioritized-especially when sourcing the 74F1071SC through authorized channels.
74F1071SC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 18
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V
- Voltage - Breakdown (Min):
- -
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- 800mW
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
74F1071SC FAQ
1.How can I place an order for 74F1071SC through Aetrix?
Please submit a Request for Quotation (RFQ) for 74F1071SC 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 74F1071SC reliable?
The price and inventory of 74F1071SC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74F1071SC is usually 5 days.
3.What payment methods are accepted for 74F1071SC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74F1071SC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74F1071SC?
74F1071SC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74F1071SC 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 74F1071SC?
For technical support, including 74F1071SC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74F1071SC requirements.
6.How does Aetrix verify that 74F1071SC is sourced from the original manufacturer or authorized distributors?
All 74F1071SC 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 74F1071SC meets industry standards.
7.What is the process for return or replacement of 74F1071SC?
All 74F1071SC units undergo pre-shipment inspection (PSI). If there is an issue with 74F1071SC, 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 74F1071SC part is unused and in its original packaging.
Return procedure for 74F1071SC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74F1071SC Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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