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Analog Devices Inc. LTC2914HDHC-1#PBF
- Part No.:
- LTC2914HDHC-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LTC2914HDHC-1#PBF.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 16DFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LTC2914HDHC-1#PBF from Analog Devices (formerly Linear Technology) is a quad-input, latching overvoltage/undervoltage supervisor IC designed for simultaneous monitoring of four independent supply rails in high-reliability systems. It delivers ±1.5% threshold accuracy over temperature, 62µA quiescent current, adjustable reset timeout via external capacitor, and supports both positive and negative voltage monitoring using a buffered 1V reference. It is deployed in industrial-grade server power management and core voltage supervision.
For engineers reviewing the LTC2914HDHC-1#PBF datasheet, LTC2914HDHC-1#PBF pinout, LTC2914HDHC-1#PBF application, or LTC2914HDHC-1#PBF equivalent, this page provides verified functional specifications, validated DFN-16 pin mapping, confirmed H-grade (–40°C to +125°C) operation, and two field-validated alternative parts with documented technical and application differences.
Technical Context
The LTC2914HDHC-1#PBF implements four independent comparator pairs (VHn/VLn), each configurable for positive or negative polarity via the three-state SEL pin. All comparators share a common 0.5V internal threshold referenced to a buffered 1V output, enabling precise UV/OV detection across ±1.5% accuracy over –40°C to +125°C.
It features latched OV output behavior (enabled by LATCH pin low), adjustable timeout delay (6–14 ms range with 1 nF CTMR), glitch-immune input filtering, and guaranteed operation down to VCC = 1V. The device integrates a 6.6V shunt regulator on VCC and supports open-drain UV/OV outputs with weak internal pull-ups and strong active-low sinks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3V to 6V direct supply; >6V requires series resistor due to internal 6.6V shunt regulator |
| Threshold Accuracy | ±1.5% over full –40°C to +125°C operating range - enables tight tolerance margining without derating |
| Quiescent Current | 62 µA typical - supports always-on monitoring in battery-backed or low-power systems |
| UV/OV Timeout | 6–14 ms adjustable via CTMR (1 nF yields 8.5 ms) - ensures reliable reset pulse width after fault clearance |
| Reference Output | 1.000 V ±15 mV (–40°C to +125°C), ±1 mA sourcing/sinking - enables accurate negative rail monitoring with 3-resistor divider |
| Input Voltage Range | VHn/VLn: –0.3V to +7.5V - supports direct connection to negative supplies when configured with SEL |
| Operating Temp | –40°C to +125°C (H-grade) - qualified for under-hood automotive, industrial control, and telecom base station use |
Pinout & Package
Package: 16-lead plastic DFN (5 mm × 3 mm), exposed pad (Pin 17), RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (16) | Supply input / shunt-regulated rail | Accepts 2.3–6V directly; >6V requires current-limiting resistor; internal 6.6V shunt enables higher-voltage operation |
| TMR (15) | Reset timeout timing control | Connects to GND via CTMR (≥10 pF) to set delay; tie to VCC to bypass timeout; controls UV/OV assertion hold time |
| SEL (14) | Three-state polarity select | Connect to VCC/GND/open to configure VH3/VL3 & VH4/VL4 as positive/negative monitors per Table 1 in datasheet |
| LATCH (13) | OV latch clear/bypass control (LTC2914-1 variant) | Pull low to latch OV output on fault; pull high to clear latch and enable timeout-based OV behavior like UV |
| UV (12) | Common undervoltage logic output | Open-drain, active-low; asserts when any monitored voltage falls below UV threshold; weak pull-up to VCC |
| OV (11) | Common overvoltage logic output | Open-drain, active-low; latched low on fault (LTC2914-1); weak pull-up to VCC; compatible with wired-OR |
| REF (10) | Buffered 1V reference output | Sources/sinks ±1 mA; drives ≤1 nF capacitive load; used as offset for negative-supply monitoring circuits |
| GND (9) | Device ground reference | Primary return path; exposed pad (Pin 17) may be connected to PCB GND for thermal performance |
| VH1 (1), VL1 (2) | Positive-polarity monitor inputs (Channel 1) | VH1 < 0.5V → UV; VL1 > 0.5V → OV; tied to VCC/GND if unused |
| VH2 (3), VL2 (4) | Positive-polarity monitor inputs (Channel 2) | Same logic as Channel 1; independent thresholds set by external resistor dividers |
| VH3 (5), VL3 (6) | Configurable-polarity monitor inputs (Channel 3) | Polarity determined by SEL state; e.g., SEL = GND configures both as negative-supply inputs |
| VH4 (7), VL4 (8) | Configurable-polarity monitor inputs (Channel 4) | Same SEL-dependent behavior as Channel 3; enables full 4-rail monitoring including dual negative rails |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent UV/OV detection | Monitors four distinct supply rails simultaneously with separate VHn/VLn inputs and shared UV/OV outputs |
| Latching OV output (LTC2914-1) | OV remains asserted until explicitly cleared via LATCH pin high - prevents spurious recovery during transient faults |
| Configurable polarity per channel pair | SEL pin selects positive/negative monitoring mode for Channels 3 & 4 without external components or layout changes |
| Glitch-immune comparator inputs | Integrated low-pass filtering rejects short-duration noise transients without adding threshold hysteresis error |
| Guaranteed operation at VCC ≥ 1V | UV asserts low and OV pulls weakly high even at 1V supply - enables early power-up supervision and brownout detection |
| Adjustable reset timeout | CTMR capacitor sets 6–14 ms delay (–40°C to +125°C) - ensures stable system reset after supply stabilization |
Applications
| Server Core Voltage Supervision | Industrial PLC Power Monitoring |
|---|---|
|
Use Scenario: Real-time monitoring of 12V, 5V, 3.3V, and 1.8V rails in dual-socket x86 server motherboards. IC Role / Device Role / Timing Role: Quad UV/OV supervisor providing synchronized reset assertion and latched fault indication for BMC and CPU power sequencing. Use Value: ±1.5% threshold accuracy ensures compliance with Intel VRD specs; 62µA IQ minimizes standby power impact on always-on management controllers. |
Use Scenario: Supervising isolated 24V DC input, 5V logic, 3.3V FPGA I/O, and –5V analog bias in programmable logic controller backplanes. IC Role / Device Role / Timing Role: Single-chip solution replacing discrete supervisors; uses REF and SEL to monitor –5V rail without additional op-amps or level shifters. Use Value: DFN-16 footprint saves >40% board area vs. four discrete supervisors; H-grade temp range supports operation in uncooled control cabinets. |
| Automotive ADAS Domain Controller | Medical Imaging Power Integrity |
|
Use Scenario: Monitoring 12V battery-derived rails (5V, 3.3V), camera sensor bias (+28V), and analog front-end (–2.5V) in radar/Ethernet domain ECUs. IC Role / Device Role / Timing Role: Fault-tolerant voltage supervisor with latched OV output for safety-critical diagnostics; operates across –40°C to +125°C junction temperature. Use Value: Guaranteed VCC ≥ 1V operation enables fail-safe reset generation during cold cranking; SEL-configured negative monitoring eliminates external reference circuitry. |
Use Scenario: Ensuring clean startup and continuous integrity of 48V motor drive, 15V detector bias, 5V digital, and –12V signal conditioning rails in MRI gradient amplifier modules. IC Role / Device Role / Timing Role: High-accuracy quad supervisor interfacing with FPGA-based health monitor; uses adjustable timeout to coordinate with FPGA configuration sequence. Use Value: 6.6V VCC shunt allows direct connection to 48V rail with simple dropping resistor; ±1.5% accuracy prevents false resets during EMI-heavy imaging cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad UV/OV monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2915HDHC-1#PBF | Same pinout, identical electrical specs, but adds watchdog timer and manual reset input | Required where system-level watchdog timeout or pushbutton-initiated reset is needed alongside voltage monitoring | Select when supervisory function must include independent watchdog capability; no change to voltage monitoring circuitry |
| TPS3307-33DGNR | Triple-channel (not quad), fixed 3.3V/5V/12V thresholds, no negative rail support, no adjustable timeout | Suitable only for simpler 3-rail systems with standard voltages and no negative supplies or fine-grained timing control | Choose for cost-sensitive, lower-complexity designs where quad monitoring and negative rail support are unnecessary |
Compared with LTC2914HDHC-1#PBF, LTC2915HDHC-1#PBF extends functionality with integrated watchdog and MR, while TPS3307-33DGNR offers lower cost and smaller footprint at the expense of channel count, flexibility, and negative voltage capability - making LTC2914HDHC-1#PBF optimal for complex, multi-rail, wide-temp industrial and automotive applications.
Availability
LTC2914HDHC-1#PBF is available at Aetrix Electronics and suitable for industrial automation, automotive ADAS domain controllers, and medical imaging equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC2914HDHC-1#PBF 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
Analog Devices, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving precision instrumentation, industrial, automotive, and communications markets.
The LTC2914 product line delivers highly accurate, low-power, multi-rail voltage supervision for mission-critical systems where reliability, temperature resilience, and design simplicity are paramount - especially in server, telecom, and harsh-environment applications.
FAQ
What is the operating temperature range of the LTC2914HDHC-1#PBF?
The LTC2914HDHC-1#PBF is rated for –40°C to +125°C junction temperature (H-grade), verified per manufacturer's datasheet Absolute Maximum Ratings and Electrical Characteristics tables. This specification applies to the DFN-16 package variant with exposed pad thermal enhancement and is validated across all key parameters including threshold accuracy, timeout delay, and supply current.
Does the LTC2914HDHC-1#PBF support monitoring negative supply voltages?
Yes, the LTC2914HDHC-1#PBF supports monitoring up to two negative voltages using its buffered 1V reference (REF pin) and three-state SEL pin. When SEL is grounded, VH3/VL3 and VH4/VL4 are configured for negative monitoring: VHn < 0.5V triggers OV, and VLn > 0.5V triggers UV - enabling accurate –5V, –12V, or –2.5V rail supervision without external op-amps.
How is the reset timeout period set on the LTC2914HDHC-1#PBF?
The reset timeout period on the LTC2914HDHC-1#PBF is set by connecting an external capacitor (CTMR) between the TMR pin (15) and GND. A 1 nF capacitor yields a typical timeout of 8.5 ms over –40°C to +125°C. The relationship is linear: CTMR (F) = tUOTO (s) × 115 × 10⁻⁹. Tying TMR to VCC disables the timeout entirely.
What is the function of the LATCH pin on the LTC2914HDHC-1#PBF?
The LATCH pin (13) on the LTC2914HDHC-1#PBF controls latching behavior of the OV output. When pulled low, OV latches low upon overvoltage detection and remains asserted until LATCH is pulled high to clear the latch. When held high, OV behaves identically to UV - asserting low during fault and releasing after the adjustable timeout expires.
Can the LTC2914HDHC-1#PBF operate with a supply voltage below 2.3V?
Yes, the LTC2914HDHC-1#PBF guarantees functional operation down to VCC = 1V. At VCC ≥ 1V, UV asserts low and OV weakly pulls high. Threshold comparison and output timing become fully active above VCC = 2V (max 2.1V UVLO release). This enables robust brownout detection and early power-up supervision in low-voltage systems.
LTC2914HDHC-1#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 4
- Voltage - Threshold:
- Adjustable/Selectable
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-DFN (5x3)
LTC2914HDHC-1#PBF FAQ
1.How can I place an order for LTC2914HDHC-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2914HDHC-1#PBF 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 LTC2914HDHC-1#PBF reliable?
The price and inventory of LTC2914HDHC-1#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2914HDHC-1#PBF is usually 5 days.
3.What payment methods are accepted for LTC2914HDHC-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2914HDHC-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2914HDHC-1#PBF?
LTC2914HDHC-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2914HDHC-1#PBF 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 LTC2914HDHC-1#PBF?
For technical support, including LTC2914HDHC-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2914HDHC-1#PBF requirements.
6.How does Aetrix verify that LTC2914HDHC-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2914HDHC-1#PBF 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 LTC2914HDHC-1#PBF meets industry standards.
7.What is the process for return or replacement of LTC2914HDHC-1#PBF?
All LTC2914HDHC-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2914HDHC-1#PBF, 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 LTC2914HDHC-1#PBF part is unused and in its original packaging.
Return procedure for LTC2914HDHC-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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