My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX795RCPA+
- Part No.:
- MAX795RCPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX795RCPA+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,114
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX795RCPA+ from Maxim Integrated is an 8-pin microprocessor supervisory circuit designed for 3.0V systems, providing precision reset assertion at 2.55V–2.70V (R-suffix), guaranteed reset down to VCC = 1V, backup-battery switchover with VBATT > VCC support, and chip-enable gating with ≤7ns propagation delay. It safeguards CMOS RAM in battery-backed embedded controllers during brownout.
For engineers reviewing the MAX795RCPA+ datasheet, MAX795RCPA+ pinout, MAX795RCPA+ application, or MAX795RCPA+ equivalent, key selection criteria include its fixed R-threshold reset window, 8-pin SO package compatibility, battery-switching hysteresis, CE IN/OUT timing integrity, and absence of watchdog or BATT OK features compared to MAX793/MAX794 variants.
Technical Context
The MAX795RCPA+ implements a precision bandgap-based reset comparator with 2.55V–2.70V trip range (VCC falling), 10mV typical hysteresis, and guaranteed assertion down to VCC = 1V. Its internal p-channel MOSFET enables seamless switchover from VCC to VBATT when VCC drops below VSW (2.52V min), with 15mV typical hysteresis to prevent oscillation.
It integrates a dedicated chip-enable transmission gate (CE IN → CE OUT) with 7ns max propagation delay, 46Ω on-resistance, and automatic disable during reset assertion to protect CMOS RAM write cycles - all without watchdog timer, manual reset input, or battery status outputs found in MAX793/MAX794.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.55V–2.70V (VCC falling); ensures reliable reset before 3.0V supply falls below 15% tolerance limit. |
| Battery Switch Threshold | 2.52V min (VCC falling); triggers switchover to backup battery before reset assertion begins. |
| VCC Supply Current | 24µA–35µA (VCC = 3.3V); ultra-low quiescent current preserves battery life in portable operation. |
| CE IN-to-CE OUT Delay | ≤7ns; maintains tight timing margins for high-speed µP address/data bus gating. |
| Operating Voltage Range | VCC = 2.72V–5.5V, VBATT = –0.3V–+6.0V; supports 3.0V systems with headroom for lithium battery overvoltage. |
| Package | 8-pin SO; surface-mount compatible with standard reflow profiles and PCB space-constrained designs. |
| Temperature Range | 0°C to +70°C; validated for commercial-grade embedded controller environments. |
Pinout & Package
MAX795RCPA+ is housed in an 8-pin SO (Small Outline) package with gull-wing leads, JEDEC MS-012AC compliant, 150 mil body width, and 1.27mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 OUT | Supply output for CMOS RAM | Switches between VCC and VBATT via internal p-MOSFET; connects to RAM VDD during normal/battery-backup modes. |
| 2 VCC | Main supply input | Primary system power rail (2.72V–5.5V); powers internal logic and drives RESET/CE OUT outputs. |
| 3 GND | Ground reference | Common return path for all internal circuits and external pullups; must be low-impedance connection. |
| 4 PFI | Power-fail comparator input | Monitors external voltage (e.g., +5V rail); asserts PFO low when input falls below 1.212V threshold. |
| 5 BATT ON | Battery switch status output | Open-drain active-high signal indicating OUT is sourced from VBATT (not VCC). |
| 6 PFO | Power-fail comparator output | Open-drain active-low output asserting when PFI < 1.212V or VCC < VSW; used for NMI or system warning. |
| 7 CE IN | Chip-enable input | Accepts µP CE signal; gated internally to CE OUT only when reset is deasserted. |
| 8 CE OUT | Chip-enable output | Drives RAM chip-enable; disabled (high-Z) during reset to block spurious writes to CMOS RAM. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed Reset Threshold (R-suffix) | 2.55V–2.70V window optimized for 3.0V ±10% supplies; eliminates external resistor divider complexity. |
| Battery Switchover with VBATT > VCC | Supports 3.6V lithium batteries directly; no level-shifting required for backup power in 3.0V systems. |
| Guaranteed Reset to VCC = 1V | Ensures µP remains held in reset even during deep brownout or slow power-down sequences. |
| CE Signal Gating (7ns max delay) | Prevents RAM corruption by blocking CE transitions during undervoltage; meets timing for fast µPs. |
| Low Quiescent Current (24µA) | Extends battery life in always-on portable equipment without compromising supervision reliability. |
Applications
| Battery-Powered Computers and Controllers | Embedded Controllers |
|---|---|
Use Scenario: Portable data logger with nonvolatile RAM retains configuration during main power loss. IC Role / Device Role / Timing Role: Supervisory IC provides VCC monitoring, battery switchover to 3.6V Li-cell, and CE gating to prevent RAM corruption during transition. Use Value: Ensures zero-data-loss RAM retention with <2.70V reset threshold and sub-7ns CE control latency. | Use Scenario: Industrial PLC module requiring fail-safe boot sequence after AC power interruption. IC Role / Device Role / Timing Role: Generates clean 200ms reset pulse on VCC dip below 2.55V while enabling battery-backed real-time clock. Use Value: Guarantees µP reset assertion down to VCC = 1V, eliminating erratic startup behavior during marginal brownouts. |
| Intelligent Controllers | Critical µP Power Monitoring |
Use Scenario: Smart meter with tamper-detection logic that must retain state across frequent grid fluctuations. IC Role / Device Role / Timing Role: Monitors 3.0V rail and asserts PFO to trigger NMI-based early warning before full reset occurs. Use Value: Provides 25mV low-line hysteresis and 1.212V PFI threshold for precise pre-failure detection. | Use Scenario: Medical diagnostic device where µP must never execute code outside valid supply range. IC Role / Device Role / Timing Role: Acts as primary power supervisor with fixed R-threshold and battery fallback to maintain safe shutdown state. Use Value: Delivers production-tested 2.55V–2.70V reset window with ±5% tolerance, ensuring compliance with IEC 60601 safety margins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX793RCPA+ | 16-pin SO; includes manual reset (MR), watchdog (WDI/WDO), BATT OK output, and battery freshness seal. | Required for systems needing fault recovery via watchdog timeout or battery health indication. | Select MAX793RCPA+ only if MR, WDI, or BATT OK functionality is essential; MAX795RCPA+ saves board space and cost where those features are unused. |
| TPS3808G12DBVR | Single-channel supervisor with 1.2V reset threshold, 360ms timeout, no battery switchover or CE gating. | Suitable for basic reset-only applications without backup power or RAM protection requirements. | Choose TPS3808G12DBVR only for simple 3.0V reset supervision; MAX795RCPA+ is mandatory when battery switchover and CE gating are required. |
Compared with MAX793RCPA+, MAX795RCPA+ reduces pin count and feature set to optimize cost and layout for 3.0V systems needing only reset, battery switchover, and CE gating - while TPS3808G12DBVR lacks both battery management and memory protection capabilities entirely.
Availability
MAX795RCPA+ is available at Aetrix Electronics and suitable for battery-powered computers and controllers, embedded controllers, intelligent controllers, and critical µP power monitoring applications requiring stable component supply and long-term industrial availability.
Supply support for MAX795RCPA+ 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
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, computing, and communications markets.
The MAX795RCPA+ belongs to the MAX793/MAX794/MAX795 family of microprocessor supervisory circuits, engineered specifically for robust power monitoring and RAM protection in 3.0V/3.3V battery-backed embedded systems.
FAQ
What is the exact reset threshold voltage range for MAX795RCPA+?
The MAX795RCPA+ has a fixed reset threshold range of 2.55V to 2.70V (VCC falling), corresponding to the 'R' suffix designation. This window is optimized for 3.0V ±10% power supplies and guarantees reset assertion before VCC falls below 2.55V, with hysteresis preventing chatter near the trip point. The threshold is factory-trimmed and does not require external components.
Does MAX795RCPA+ support backup-battery switchover with VBATT exceeding VCC?
Yes, MAX795RCPA+ supports VBATT > VCC operation - specifically up to +6.0V - enabling direct use of standard 3.6V lithium coin cells in 3.0V systems. The internal p-channel MOSFET automatically switches OUT from VCC to VBATT when VCC drops below the battery switch threshold (2.52V min), with 15mV typical hysteresis to ensure clean transition without oscillation.
What is the function of the CE IN and CE OUT pins on MAX795RCPA+?
The CE IN and CE OUT pins implement a transmission-gate-based chip-enable signal conditioner. During normal operation, CE IN passes through to CE OUT with ≤7ns propagation delay; during reset assertion, CE OUT goes high-impedance to block spurious chip-select signals and prevent corruption of CMOS RAM. This feature is unique to the MAX793/MAX794/MAX795 family and is fully integrated in MAX795RCPA+.
Is the watchdog timer present in MAX795RCPA+?
No, the watchdog timer is not present in MAX795RCPA+. It is exclusive to the MAX793 and MAX794 variants. MAX795RCPA+ omits WDI, WDO, MR, BATT OK, and battery freshness seal functions - retaining only core supervision: reset generation, battery switchover, PFI/PFO monitoring, and CE gating. This simplification reduces pin count to 8 and lowers cost for applications not requiring watchdog oversight.
What package type and lead finish does MAX795RCPA+ use?
MAX795RCPA+ uses an 8-pin SO (Small Outline) package per JEDEC MS-012AC, with gull-wing leads and 1.27mm pitch. The '+' suffix indicates lead-free (Pb-free) finish compliant with RoHS Directive 2011/65/EU, featuring matte tin plating over nickel underplate. The package is rated for reflow soldering up to +260°C peak temperature.
MAX795RCPA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.625V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX795RCPA+ FAQ
1.How can I place an order for MAX795RCPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX795RCPA+ 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 MAX795RCPA+ reliable?
The price and inventory of MAX795RCPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX795RCPA+ is usually 5 days.
3.What payment methods are accepted for MAX795RCPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX795RCPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX795RCPA+?
MAX795RCPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX795RCPA+ 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 MAX795RCPA+?
For technical support, including MAX795RCPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX795RCPA+ requirements.
6.How does Aetrix verify that MAX795RCPA+ is sourced from the original manufacturer or authorized distributors?
All MAX795RCPA+ 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 MAX795RCPA+ meets industry standards.
7.What is the process for return or replacement of MAX795RCPA+?
All MAX795RCPA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX795RCPA+, 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 MAX795RCPA+ part is unused and in its original packaging.
Return procedure for MAX795RCPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX795RCPA+ 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…
