My Inquiry
My Account
Analog Devices Inc. LTC2901-4CGN#PBF
- Part No.:
- LTC2901-4CGN#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC2901-4CGN#PBF.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:100
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC2901-4CGN#PBF from Analog Devices (acquired Linear Technology) is a programmable quad supply monitor IC with push-pull RST output, 16 selectable voltage threshold combinations (5V/3.3V/3V/2.5V/1.8V/1.5V/±Adj), ±1.5% threshold accuracy over temperature, 5%/10% selectable undervoltage tolerance, and adjustable reset/watchdog timing via external capacitors - used in multivoltage server power sequencing and telecom board-level supervision.
For engineers reviewing the LTC2901-4CGN#PBF datasheet, LTC2901-4CGN#PBF pinout, LTC2901-4CGN#PBF application, or LTC2901-4CGN#PBF equivalent, key selection criteria include push-pull RST drive capability, TOL pin-controlled 10% monitoring mode, guaranteed RST assertion down to VCC = 1V, and compatibility with 16-lead narrow SSOP layout constraints.
Technical Context
The LTC2901-4CGN#PBF implements four independent high-accuracy comparators with internal bandgap reference (1.210V ±1.5%), programmable trip points selected via resistive divider on VPG, and glitch-immune detection logic. Its TOL pin enables dynamic switching between 5% and 10% undervoltage thresholds without resistor changes.
Reset timing (tRST = 4.6 ms/nF on CRT) and watchdog timeout (tWD = 20 ms/nF on CWT) are capacitor-programmable; the push-pull RST output actively drives high to V2 (not open-drain), eliminating external pull-up requirements for fast release. All COMPX outputs are nondelayed, active-high, weakly pulled to V2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Monitor Count | 4 independent inputs (V1–V4) with individual COMPX outputs and shared RST assertion |
| Threshold Accuracy | ±1.5% of monitored voltage over full operating temperature range (0°C to 70°C) |
| RST Output Type | Push-pull (actively driven high to V2), enabling direct interface with 3.3V/5V logic without external pull-up |
| Quiescent Current | 43 μA typical - supports battery-backed or ultra-low-power system supervision |
| Minimum Operating VCC | 1 V - ensures reliable reset assertion during brownout conditions before core logic fails |
| Adjustable Timing Range | tRST: 5–9 ms (CRT = 1500 pF); tWD: 20–40 ms (CWT = 1500 pF); scalable via capacitor selection |
| Input Voltage Range | V1–V4: –0.3 V to 7 V; supports positive, negative, and adjustable rail monitoring |
Pinout & Package
Package: 16-lead narrow plastic SSOP (GN16), 0.15mm lead pitch, RoHS-compliant #PBF finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| COMP3 (Pin 1) | Comparator Output 3 | Active-high, nondelayed signal indicating V3 > threshold; weak pull-up to V2 |
| COMP1 (Pin 2) | Comparator Output 1 | Active-high, nondelayed signal indicating V1 > threshold; weak pull-up to V2 |
| V3 (Pin 3) | Voltage Input 3 | Configurable for 2.5V, 1.8V, 1.5V, or ADJ mode; high-impedance sensing node |
| V1 (Pin 4) | Voltage Input 1 | Configurable for 5V or 3.3V; greater of V1/V2 sets internal VCC |
| CRT (Pin 5) | Reset Delay Programming | Capacitor-to-GND sets tRST = 4.6 ms/nF; open = ~50 μs minimum delay |
| RST (Pin 6) | Reset Logic Output | Push-pull active-low output; guaranteed valid down to VCC = 1V |
| TOL (Pin 7) | Tolerance Selection Input | Logic high selects 10% undervoltage threshold; logic low selects 5% |
| WDI (Pin 8) | Watchdog Input | Rising/falling edge resets watchdog timer; no external pull required (10 μA internal pull-up) |
| CWT (Pin 9) | Watchdog Timeout Programming | Capacitor-to-GND sets tWD = 20 ms/nF; open = ~200 μs minimum timeout |
| GND (Pin 10) | Ground Reference | Primary return path for all analog and digital circuitry |
| VPG (Pin 11) | Program Voltage Input | Resistive divider from VREF selects one of 16 voltage threshold combinations |
| VREF (Pin 12) | Buffered Reference | 1.210 V ±1.5% output; sources/sinks ±1 mA; drives VPG divider and –ADJ circuits |
| V4 (Pin 13) | Voltage Input 4 | Configurable for 1.8V, 1.5V, ADJ, or –ADJ (for negative rail monitoring) |
| V2 (Pin 14) | Voltage Input 2 | Configurable for 3.3V, 3V, or 2.5V; greater of V1/V2 sets internal VCC |
| COMP4 (Pin 15) | Comparator Output 4 | Active-high, nondelayed signal indicating V4 > threshold; weak pull-up to V2 |
| COMP2 (Pin 16) | Comparator Output 2 | Active-high, nondelayed signal indicating V2 > threshold; weak pull-up to V2 |
Key Features
| Feature | Design Value |
|---|---|
| 16 Preset Threshold Combinations | Single VPG resistor divider selects exact 5V/3.3V/2.5V/1.8V/1.5V/±Adj mix - eliminates firmware configuration |
| Push-Pull RST Output | Actively drives high to V2 (not open-drain), reducing BOM count and improving noise immunity in dense layouts |
| TOL Pin for Dual Tolerance Mode | Hardware-selectable 5% or 10% undervoltage detection - enables one design to support multiple PSU tolerances |
| Guaranteed Operation at VCC = 1V | Ensures deterministic reset assertion during deep brownout, preventing undefined microprocessor states |
| –ADJ Input for Negative Rails | V4 supports monitoring of negative supplies (e.g., –5V, –12V) using VREF as level-shift reference |
| Glitch-Immune Comparator Architecture | Internal filtering prevents false resets from transient supply noise or ESD events |
Applications
| Server Power Sequencing | Telecom Line Card Supervision |
|---|---|
|
Use Scenario: Monitoring 5V, 3.3V, 2.5V, and 1.8V rails on a dual-CPU server motherboard during cold start and hot-swap events. IC Role / Device Role / Timing Role: Quad comparator asserts RST until all rails stabilize above ±1.5% accurate thresholds; CRT = 47 nF enforces 216 ms hold-off before CPU release. Use Value: Prevents premature processor execution due to marginal rail settling, eliminating boot failures in high-reliability datacenter environments. |
Use Scenario: Supervising +3.3V, +2.5V, +1.8V, and –48V bias rails on a carrier-grade optical line card with redundant power feeds. IC Role / Device Role / Timing Role: V4 in –ADJ mode monitors –48V via VREF-referenced divider; TOL pin enables field-selectable 10% tolerance for aging PSUs. Use Value: Extends field life of telecom hardware by accommodating gradual PSU drift without board redesign or firmware update. |
| Notebook System Power Management | Industrial PLC I/O Module |
|
Use Scenario: Validating core voltage (1.2V ADJ), memory (1.5V), chipset (3.3V), and battery charger (5V) in ultrabook platform during sleep/wake transitions. IC Role / Device Role / Timing Role: COMPX outputs feed PMIC enable signals; push-pull RST directly controls SoC reset without level-shifter. Use Value: Reduces standby current by 43 μA versus discrete supervisor solutions while maintaining sub-100 μs fault response. |
Use Scenario: Detecting undervoltage on isolated 24V DC input, 5V logic, 3.3V FPGA core, and –12V analog op-amp rails in factory automation controller. IC Role / Device Role / Timing Role: CRT and CWT capacitors tuned for 100 ms reset and 500 ms watchdog - matching PLC scan cycle timing. Use Value: Enables fail-safe shutdown within one PLC scan period, meeting SIL-2 functional safety requirements without external timers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad supply monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6812HEUS+T | Fixed 3.3V/2.5V/1.8V/1.5V thresholds; no adjustable or negative rail support; open-drain RST only | Lower cost for static-rail systems; lacks TOL pin, VREF, or –ADJ capability | Select when design uses only standard voltages and requires minimal footprint (SOT23-6) |
| TPS3808G33DBVR | Triple monitor (not quad); fixed 3.3V threshold; no VPG programming or TOL pin; 1.6V min VCC | Suitable for simpler systems; cannot replace LTC2901-4CGN#PBF's 4-rail + negative monitoring | Choose only if supervising ≤3 rails and no negative supply monitoring is needed |
Compared with MAX6812HEUS+T and TPS3808G33DBVR, the LTC2901-4CGN#PBF uniquely delivers field-programmable quad-rail monitoring with push-pull RST, ±ADJ capability, and hardware-selectable tolerance - making it irreplaceable in multivoltage, high-accuracy, or negative-rail applications where flexibility and precision are mandatory.
Availability
LTC2901-4CGN#PBF is available at Aetrix Electronics and suitable for server power sequencing, telecom line card supervision, and industrial PLC I/O modules requiring stable component supply across extended product lifecycles.
Supply support for LTC2901-4CGN#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, formed through the acquisition of Linear Technology in 2017.
The LTC2901 family was designed by Linear Technology specifically for precision, programmable multirail power supervision in computing, telecom, and industrial systems where reliability and configurability outweigh cost sensitivity.
FAQ
What is the function of the TOL pin on the LTC2901-4CGN#PBF?
The TOL pin on the LTC2901-4CGN#PBF selects between 5% and 10% undervoltage monitoring thresholds. When pulled high, it activates the 10% mode for all four inputs; when low, it defaults to 5%. This hardware-selectable feature allows one PCB design to accommodate varying power supply tolerances without resistor changes - a capability confirmed in the LTC2901-4CGN#PBF datasheet Section "Features" and Electrical Characteristics table footnote 4.
Does the LTC2901-4CGN#PBF support monitoring of negative supply voltages?
Yes, the LTC2901-4CGN#PBF supports negative rail monitoring via its V4 input in –ADJ mode. In this configuration, an external resistor divider connects between the negative supply and VREF (1.210 V), with VREF providing the necessary level shift. The trip voltage is calculated as VTRIP = VREF × R3/R4, enabling accurate supervision of rails such as –5V or –12V - explicitly detailed in Figure 6 and Applications Information section of the LTC2901-4CGN#PBF datasheet.
How does the push-pull RST output of the LTC2901-4CGN#PBF differ from open-drain alternatives?
The LTC2901-4CGN#PBF features a push-pull RST output that actively drives high to V2 (not open-drain), eliminating the need for an external pull-up resistor. This reduces BOM count, improves rise time (typical 206 ns with 150 pF load), and ensures robust logic-level compatibility with 3.3V/5V systems - a distinction confirmed in the "Features" list and Functional Block Diagram for LTC2901-2/LTC2901-4 variants in the LTC2901-4CGN#PBF datasheet.
What is the minimum VCC required for valid RST assertion in the LTC2901-4CGN#PBF?
The LTC2901-4CGN#PBF guarantees correct RST logic state for VCC ≥ 1 V, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. This ensures deterministic reset behavior during deep brownout conditions - critical for preventing undefined microprocessor states in mission-critical systems - and is a documented specification unique to the LTC2901-4CGN#PBF among quad supervisors.
Can the LTC2901-4CGN#PBF monitor fewer than four supply rails?
Yes, the LTC2901-4CGN#PBF can be configured to monitor fewer than four rails. Unused inputs (e.g., V3 or V4) may be tied to GND or left unconnected, and the VPG resistor divider selects only the desired combination (e.g., 5V/3.3V/2.5V/ADJ). The device draws only 43 μA quiescent current regardless of active inputs - a design flexibility confirmed in the "Features" section and Applications Information of the LTC2901-4CGN#PBF datasheet.
LTC2901-4CGN#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 4
- Voltage - Threshold:
- 16 Selectable Threshold Combinations
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 5ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
LTC2901-4CGN#PBF FAQ
1.How can I place an order for LTC2901-4CGN#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2901-4CGN#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 LTC2901-4CGN#PBF reliable?
The price and inventory of LTC2901-4CGN#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2901-4CGN#PBF is usually 5 days.
3.What payment methods are accepted for LTC2901-4CGN#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2901-4CGN#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2901-4CGN#PBF?
LTC2901-4CGN#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2901-4CGN#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 LTC2901-4CGN#PBF?
For technical support, including LTC2901-4CGN#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2901-4CGN#PBF requirements.
6.How does Aetrix verify that LTC2901-4CGN#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2901-4CGN#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 LTC2901-4CGN#PBF meets industry standards.
7.What is the process for return or replacement of LTC2901-4CGN#PBF?
All LTC2901-4CGN#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2901-4CGN#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 LTC2901-4CGN#PBF part is unused and in its original packaging.
Return procedure for LTC2901-4CGN#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC2901-4CGN#PBF 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…
