My Inquiry
My Account
Analog Devices Inc. LTC2903CS6-E1#TRMPBF
- Part No.:
- LTC2903CS6-E1#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LTC2903CS6-E1#TRMPBF.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:378
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC2903CS6-E1#TRMPBF from Analog Devices (formerly Linear Technology) is a precision quad supply monitor IC in a 6-lead TSOT-23 package, designed to supervise four voltage rails simultaneously with guaranteed reset assertion down to VCC = 0.5V. It monitors fixed 5V on V1 and three adjustable inputs (V2/V3/V4) referenced to an internal 0.5V bandgap, supports ±1.5% threshold accuracy over temperature, and delivers 200ms reset timeout - ideal for multivoltage telecom and server power sequencing.
For engineers reviewing the LTC2903CS6-E1#TRMPBF datasheet, LTC2903CS6-E1#TRMPBF pinout, LTC2903CS6-E1#TRMPBF application, or LTC2903CS6-E1#TRMPBF equivalent, key selection criteria include its 5V/ADJ/ADJ/ADJ monitoring configuration, ultralow-voltage reset capability below 0.5V, open-drain RST output with V1-referenced weak pull-up, 20µA quiescent current, and compatibility with high-noise industrial power-up sequences requiring glitch immunity and no hysteresis-induced accuracy loss.
Technical Context
The LTC2903CS6-E1#TRMPBF implements four independent comparators, each comparing an input voltage against a precise 0.5V internal reference (for adjustable inputs) or a factory-trimmed threshold (4.675V ±1.5% for V1). Its internal VCC is derived solely from V1, enabling operation even when other supplies are absent - a critical feature for brownout detection during partial power loss.
Reset assertion requires all four inputs to remain below their respective thresholds; deassertion occurs only after all inputs exceed thresholds and sustain compliance for 200ms. The RST output uses an open-drain NMOS pulldown driven by V1 and a weak internal pull-up to V1 (10µA typical), eliminating need for external biasing in single-supply systems while supporting wired-OR reset architectures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| V1 Threshold | 4.675V ±1.5% (5V, 5% reset) - ensures reliable reset at 4.425V minimum under worst-case temp/voltage drift |
| V2/V3/V4 Threshold | 0.500V ±0.008V internal reference - enables user-defined trip points via resistor dividers (e.g., 12V → 11.25V) |
| Reset Timeout | 200ms nominal (140–260ms range) - provides robust filtering of supply transients <5Hz without hysteresis degradation |
| Supply Current | 20µA typical - minimizes loading on monitored rails, critical for battery-backed or low-power systems |
| RST Low Voltage | ≤150mV at VCC = 0.5V / IRST = 5µA - guarantees logic-low reset signal even during deep brownout |
| Operating Temp | –40°C to 85°C (I-grade) - validated for industrial and telecom base station environments |
| Package | 6-lead TSOT-23 (1mm height) - enables dense PCB layouts in space-constrained optical networking modules |
Pinout & Package
Package: 6-lead plastic TSOT-23 (JEDEC MO-193), 1.90mm × 2.80mm footprint, 1.00mm max height, lead pitch 0.95mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V1 (Pin 1) | Main supply input & VCC source | Supplies internal regulator; sets 5V fixed threshold; must be bypassed with ≥0.1µF capacitor |
| GND (Pin 2) | Analog/digital ground reference | Common return for all comparators and RST driver; requires low-impedance connection |
| V2 (Pin 3) | Adjustable voltage input | Compares against 0.5V reference; used with external R-divider to monitor custom rail (e.g., 3.3V, 2.5V) |
| V3 (Pin 4) | Adjustable voltage input | Same function as V2; supports independent monitoring of third rail (e.g., 1.8V, 1.2V) |
| V4 (Pin 5) | Adjustable voltage input | Same function as V2/V3; enables full quad monitoring of non-standard supplies |
| RST (Pin 6) | Open-drain reset output | Pulls low when any input underruns; internal 10µA pull-up to V1; sinks ≥5µA down to 0.5V |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow-voltage reset guarantee | RST remains functional with VCC as low as 0.5V - prevents spurious release during deep brownout |
| No hysteresis architecture | Maintains ±1.5% threshold accuracy without sacrificing noise immunity - uses comparator transient integration instead |
| Triple adjustable inputs | V2/V3/V4 each compare to 0.5V reference - enables monitoring of arbitrary positive rails using standard 1% resistors |
| V1-sourced internal supply | VCC generated exclusively from V1 - eliminates dependency on other rails for supervision integrity |
| Glitch-immune timing | 200ms reset timeout with automatic reset-on-violation - rejects short transients while ensuring clean system initialization |
Applications
| Telecom Power Sequencing | Optical Line Card Supervision |
|---|---|
Use Scenario: Monitoring 5V bias, 3.3V logic, 2.5V PHY, and 1.8V SerDes supplies in a 10Gbps optical transceiver module. IC Role / Device Role / Timing Role: Quad supply monitor enforcing strict power-up order and detecting brownout on any rail before FPGA configuration begins. Use Value: Prevents configuration corruption by holding RST low until all rails stabilize above 4.425V (V1), 3.036V (V2), 2.175V (V3), and 1.566V (V4) for 200ms. |
Use Scenario: Supervising distributed 12V, 5V, 3.3V, and 1.2V rails across a multi-layer optical line card with hot-swap capability. IC Role / Device Role / Timing Role: Centralized reset generator that asserts system-wide reset if any monitored rail drops below its threshold during hot-insertion. Use Value: Enables safe hot-swap by guaranteeing RST stays low until all rails reach valid levels - critical for preventing latch-up in pluggable modules. |
| Industrial Server Baseboard | Cellular Base Station PSU |
Use Scenario: Validating 5V management controller, 3.3V I/O, 1.8V memory, and 0.85V core supplies on an ATX-compatible server motherboard. IC Role / Device Role / Timing Role: Fault-tolerant power-good arbiter feeding reset to BMC and CPU VRM enable logic. Use Value: Provides deterministic 200ms reset hold time after power-on, eliminating race conditions between VRMs and digital logic during cold start. |
Use Scenario: Monitoring 48V DC-DC converter outputs (24V, 12V, 5V, 3.3V) in a macrocell base station power distribution unit. IC Role / Device Role / Timing Role: Redundant supervisor verifying primary and backup power paths before enabling RF amplifiers. Use Value: Ensures amplifier enable only occurs after both primary and backup 5V rails exceed 4.425V for 200ms - preventing RF stage damage during switchover. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad supply monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2903CS6-D1#TRMPBF | Fixed 3.3V threshold on V1; same triple-adjustable V2/V3/V4 architecture | Better suited for 3.3V-centric systems (e.g., legacy embedded controllers) where 5V monitoring is unnecessary | Select D1 when main rail is 3.3V and E1's 5V threshold would require excessive divider attenuation |
| LTC2900CMS8-5#PBF | MSOP-8 package; 16 selectable threshold combinations; no adjustable inputs; ±1.5% accuracy | Offers fixed-rail flexibility (e.g., 5V/3.3V/2.5V/1.8V) but lacks user-defined trip points for nonstandard voltages | Choose LTC2900 when standardized rail combinations suffice and board space allows larger MSOP-8 footprint |
Compared with LTC2903CS6-D1#TRMPBF and LTC2900CMS8-5#PBF, the LTC2903CS6-E1#TRMPBF uniquely combines 5V fixed supervision with three fully adjustable inputs in the smallest possible footprint - making it optimal for next-generation telecom equipment requiring custom voltage margins and ultra-dense packaging.
Availability
LTC2903CS6-E1#TRMPBF is available at Aetrix Electronics and suitable for multivoltage telecom infrastructure, optical networking systems, and cellular base station power management requiring stable component supply, long-term lifecycle support, and guaranteed parametric performance across –40°C to 85°C.
Supply support for LTC2903CS6-E1#TRMPBF 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 acquired Linear Technology in 2017 and maintains full product continuity, technical documentation, and manufacturing control for the LTC portfolio.
The LTC2903CS6-E1#TRMPBF belongs to Linear's precision power supervision family, engineered specifically for high-reliability applications where deterministic reset behavior, ultralow-voltage operation, and minimal quiescent current are mandatory - such as carrier-grade networking and mission-critical industrial control.
FAQ
What is the exact reset threshold voltage for V1 on the LTC2903CS6-E1#TRMPBF?
The LTC2903CS6-E1#TRMPBF has a guaranteed V1 reset threshold of 4.675V ±1.5% (4.600V to 4.750V) over temperature, corresponding to a 5V nominal supply with 5% undervoltage tolerance. This value is factory-trimmed and specified in the Electrical Characteristics table under symbol VRT50 with "●" indicating full-temperature-range validity.
Can the LTC2903CS6-E1#TRMPBF monitor negative voltages like –5.2V?
No, the LTC2903CS6-E1#TRMPBF cannot monitor negative voltages. Its V2, V3, and V4 inputs are designed for positive rails only and reference an internal 0.5V bandgap. For –5.2V monitoring, the LTC2903CS6-C1 variant is required, which includes a dedicated negative-input comparator and absolute maximum rating of –6.5V on V4.
How does the RST output behave when V1 drops below 0.5V?
The LTC2903CS6-E1#TRMPBF guarantees RST output functionality down to VCC = 0.5V, meaning it will actively pull RST low until V1 reaches at least 0.5V. Below this level, the internal circuitry ceases operation and RST enters high-impedance state - requiring an external pull-up resistor to ensure defined logic level in deep brownout conditions.
What external components are mandatory for stable operation of the LTC2903CS6-E1#TRMPBF?
A 0.1µF ceramic bypass capacitor is mandatory on V1 (Pin 1) to stabilize the internal VCC regulator. No capacitors are required on V2/V3/V4 unless operating in high-noise environments; in such cases, 0.1µF ceramics may be added. An external pull-up resistor on RST is optional but recommended for faster rise times or when interfacing with logic families requiring higher VOH.
Is the LTC2903CS6-E1#TRMPBF pin-compatible with other variants in the LTC2903 family?
Yes, all LTC2903 variants including LTC2903CS6-E1#TRMPBF share identical 6-lead TSOT-23 pinout and package dimensions. However, electrical behavior differs: V1 threshold (5V for E1 vs 3.3V for D1), internal pull-up reference (V1 for E1/D1 vs V2 for A1/B1/C1), and input configurations vary - requiring schematic review before substitution.
LTC2903CS6-E1#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 4
- Voltage - Threshold:
- 4.675V, Adj, Adj, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
LTC2903CS6-E1#TRMPBF FAQ
1.How can I place an order for LTC2903CS6-E1#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2903CS6-E1#TRMPBF 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 LTC2903CS6-E1#TRMPBF reliable?
The price and inventory of LTC2903CS6-E1#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2903CS6-E1#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2903CS6-E1#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2903CS6-E1#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2903CS6-E1#TRMPBF?
LTC2903CS6-E1#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2903CS6-E1#TRMPBF 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 LTC2903CS6-E1#TRMPBF?
For technical support, including LTC2903CS6-E1#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2903CS6-E1#TRMPBF requirements.
6.How does Aetrix verify that LTC2903CS6-E1#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2903CS6-E1#TRMPBF 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 LTC2903CS6-E1#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2903CS6-E1#TRMPBF?
All LTC2903CS6-E1#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2903CS6-E1#TRMPBF, 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 LTC2903CS6-E1#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2903CS6-E1#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC2903CS6-E1#TRMPBF Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
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…
