My Inquiry
My Account
Analog Devices Inc. ADM800MARNZ-REEL
- Part No.:
- ADM800MARNZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADM800MARNZ-REEL.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,114
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADM800MARNZ-REEL from Analog Devices is a microprocessor supervisory circuit integrating power-on reset, battery backup switchover, watchdog timer, chip enable gating, and power-fail detection. It features a 4.4 V ±2% reset threshold, 200 ms fixed reset timeout, 1.6 s/100 ms selectable watchdog timeout, and supports VCC down to 1 V operation. It is used in industrial controllers and embedded systems requiring reliable power monitoring and RAM backup.
For engineers reviewing the ADM800MARNZ-REEL datasheet, ADM800MARNZ-REEL pinout, ADM800MARNZ-REEL application, or ADM800MARNZ-REEL equivalent, key selection criteria include its precise 4.4 V reset threshold for ±10% 5 V supplies, low 100 µA standby current, integrated CE gating for RAM write protection, and dual-mode watchdog with external capacitor or clock programmability.
Technical Context
The ADM800MARNZ-REEL implements a precision bandgap-based voltage detector (4.4 V ±2%) with 15 mV hysteresis and internal 200 ms reset timer. Its battery switchover uses PMOS (VCC→VOUT, 0.8–1.2 Ω) and NMOS (VBATT→VOUT, 12–25 Ω) switches, enabling seamless transition between main supply and backup source at VCC as low as 1 V.
It integrates a three-level watchdog input (WDI) with configurable timeout via OSC SEL/OSC IN - supporting internal oscillator (1.6 s or 100 ms), external capacitor (adjustable 600×C/47 pF), or external clock (1024/fCLK). The PFI comparator uses a stable 1.25 V reference with ±25 nA input bias and 25–60 µs propagation delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.4 V ±2% - matches 5 V ±10% supplies; ensures reset assertion before logic failure. |
| Reset Timeout | 200 ms typ - holds µP in reset long enough for power and clock stabilization. |
| VCC to VOUT RON | 0.8–1.2 Ω - enables 250 mA continuous output with <60 mV dropout at 25 mA. |
| Standby Current | 70–100 µA - minimizes system quiescent load during normal operation. |
| Battery Backup Current | 0.04–1 µA - extends backup runtime for CMOS RAM during extended outages. |
| Watchdog Timeout | 100 ms (short) or 1.6 s (long) - configurable via OSC IN/OSC SEL for software recovery tuning. |
| PFI Threshold | 1.225–1.275 V - enables early warning of 5 V rail collapse using external resistor divider. |
Pinout & Package
ADM800MARNZ-REEL is housed in a 16-pin narrow SOIC (R-16N) package with 1.27 mm pitch, RoHS-compliant, tape-and-reel format (REEL suffix). Pin 1 is VBATT; pin 16 is RESET (open-drain complement).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VBATT | Backup Battery Input | Connects to Li-ion, supercapacitor, or NiMH; enables automatic switchover when VCC drops below VBATT + 0.03 V. |
| 2 VOUT | Switched Output | Delivers VCC or VBATT to RAM; supports 250 mA from VCC or 10 mA from 2.0 V battery. |
| 3 VCC | Main Supply Input | Operates from 4.5–5.5 V; internal circuitry functional down to 1 V for brownout hold. |
| 4 GND | Ground Reference | Common return for all analog/digital functions; must be low-impedance for noise immunity. |
| 5 BATT ON | Battery Status Output | Active-high signal indicating VBATT is active on VOUT; drives external PNP base for >250 mA loads. |
| 6 LOW LINE | Power-Fail Indicator | Asserts low when VCC falls below 4.4 V; used for immediate µP interrupt or status LED. |
| 11 WDI | Watchdog Input | Three-level input (low/mid/high); toggling resets watchdog; floating disables timer. |
| 12 CEOUT | Gated Chip Enable Output | Replicates CEIN when VCC > reset threshold; forces high during reset to block RAM writes. |
| 14 WDO | Watchdog Status Output | Active-low open-drain flag; remains low until next WDI transition after timeout. |
| 15 RESET | Reset Output | Active-low push-pull output; asserts for 200 ms after VCC rises above 4.4 V. |
| 16 RESET | Complementary Reset | Active-high open-drain output; provides inverted reset for µPs requiring active-high assertion. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable Watchdog Timeout | Configurable via external capacitor (600×C/47 pF) or clock (1024/fCLK) - enables precise software execution monitoring. |
| Integrated CE Gating | CEOUT follows CEIN only when VCC > 4.4 V - prevents corrupted RAM writes during brownouts without external logic. |
| Low-Dropout Battery Switchover | VCC→VOUT RON = 0.8 Ω; VBATT→VOUT RON = 12 Ω at 2.8 V - maintains >2.7 V to RAM under 10 mA load during backup. |
| Early Power-Fail Warning | 1.25 V PFI comparator with 25 µs response - allows µP to save critical data before VCC collapses below 4.4 V. |
| Ultra-Low Backup Current | 0.04 µA typical battery standby - extends 100 µF supercapacitor backup time to >10 hours at 2.8 V. |
Applications
| Industrial PLC Controller | Automotive Telematics Module |
|---|---|
Use Scenario: Power interruption during CAN bus firmware update in factory-floor PLC. IC Role / Device Role / Timing Role: Supervisory IC asserts RESET for 200 ms on brownout, gates CEOUT to freeze RAM writes, and triggers WDO if firmware hangs. Use Value: Prevents EEPROM corruption and ensures deterministic restart after 5 V rail dip caused by motor switching noise. |
Use Scenario: Vehicle ignition cycle with transient 3.2–4.3 V battery sag during cranking. IC Role / Device Role / Timing Role: ADM800MARNZ-REEL monitors VCC, switches to backup capacitor on sag, and holds µP in reset until stable 5 V returns. Use Value: Maintains GPS position buffer and cellular session state across 150 ms cranking transients without reboot. |
| Medical Infusion Pump | Smart Energy Meter |
Use Scenario: AC mains loss during dose delivery requiring safe shutdown and log persistence. IC Role / Device Role / Timing Role: Detects VCC drop via LOW LINE, asserts PFO to trigger NMI, and switches VOUT to supercapacitor for 500 ms backup. Use Value: Enables full dose completion and secure event logging before power exhaustion. |
Use Scenario: Utility meter operating on 3.6 V lithium battery with periodic 5 V charging pulses. IC Role / Device Role / Timing Role: Uses VBATT switchover and BATT ON to control external PNP for >300 mA RAM refresh bursts during charge cycles. Use Value: Eliminates need for discrete battery management IC while supporting 10-year meter lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM800LARNZ-REEL | 4.65 V ±2% reset threshold; otherwise identical pinout, timing, and features. | Suitable for tighter-tolerance 5 V ±5% supplies; not compatible with ±10% rails. | Select ADM800LARNZ-REEL only if system VCC regulation meets 4.55–4.75 V spec. |
| MAX693AESA+ | 4.4 V ±3% reset; 100 µA typical supply current; no CE gating; different pinout (16-pin SO). | Lacks RAM write protection and chip-enable control; requires external logic for CE blocking. | Choose MAX693AESA+ only when CE gating is unnecessary and layout allows pinout redesign. |
Compared with ADM800LARNZ-REEL and MAX693AESA+, the ADM800MARNZ-REEL uniquely balances ±10% supply compatibility, integrated CE gating, and ultra-low backup current-making it optimal for cost-sensitive industrial controllers where RAM integrity and brownout resilience are critical.
Availability
ADM800MARNZ-REEL is available at Aetrix Electronics and suitable for industrial PLCs, automotive telematics modules, medical infusion pumps, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADM800MARNZ-REEL 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, founded in 1965 and headquartered in Wilmington, MA.
The ADM691A/ADM693A/ADM800L/M family was designed specifically for robust power supervision in microprocessor-based systems - delivering integrated reset, watchdog, battery switchover, and memory protection in a single 16-pin IC.
FAQ
What is the reset threshold voltage of the ADM800MARNZ-REEL?
The ADM800MARNZ-REEL has a guaranteed reset threshold of 4.25 V minimum, 4.40 V typical, and 4.50 V maximum at 25°C, with ±2% tolerance. This 4.4 V nominal threshold is optimized for 5 V ±10% power supplies, ensuring reliable reset assertion before logic errors occur in connected microprocessors.
Does the ADM800MARNZ-REEL support external adjustment of the watchdog timeout period?
Yes, the ADM800MARNZ-REEL supports external watchdog timeout adjustment via two methods: connecting a capacitor between OSC IN and GND (Twd = 600 × C/47 pF), or driving OSC IN with an external clock (Twd = 1024/fCLK). These configurations require OSC SEL tied low and are fully documented in Table II of the datasheet.
How does the ADM800MARNZ-REEL handle battery backup switchover during power failure?
The ADM800MARNZ-REEL automatically switches VOUT from VCC to VBATT when VCC falls below VBATT + 0.03 V (power-up) or VBATT − 0.03 V (power-down), with 60 mV hysteresis. In backup mode, it delivers VBATT to VOUT through a 12–25 Ω switch and draws only 0.04–1 µA, preserving battery life for CMOS RAM retention.
Can the ADM800MARNZ-REEL drive external transistors for higher VOUT current?
Yes, the BATT ON output of the ADM800MARNZ-REEL is designed to drive the base of an external PNP transistor. When VBATT powers VOUT, BATT ON goes high and sources up to 100 µA, enabling use of a PNP pass device to extend VOUT current beyond the internal 250 mA limit - as shown in Figure 21 of the datasheet.
What is the function of the dual RESET outputs on the ADM800MARNZ-REEL?
The ADM800MARNZ-REEL provides two RESET outputs: pin 15 is an active-low push-pull RESET, and pin 16 is an active-high open-drain RESET. This dual configuration supports both standard active-low microprocessor reset inputs and legacy systems requiring active-high assertion, eliminating need for external inverters.
ADM800MARNZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.4V
- Output:
- Open Drain, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
ADM800MARNZ-REEL FAQ
1.How can I place an order for ADM800MARNZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM800MARNZ-REEL 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 ADM800MARNZ-REEL reliable?
The price and inventory of ADM800MARNZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM800MARNZ-REEL is usually 5 days.
3.What payment methods are accepted for ADM800MARNZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM800MARNZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM800MARNZ-REEL?
ADM800MARNZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM800MARNZ-REEL 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 ADM800MARNZ-REEL?
For technical support, including ADM800MARNZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM800MARNZ-REEL requirements.
6.How does Aetrix verify that ADM800MARNZ-REEL is sourced from the original manufacturer or authorized distributors?
All ADM800MARNZ-REEL 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 ADM800MARNZ-REEL meets industry standards.
7.What is the process for return or replacement of ADM800MARNZ-REEL?
All ADM800MARNZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM800MARNZ-REEL, 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 ADM800MARNZ-REEL part is unused and in its original packaging.
Return procedure for ADM800MARNZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADM800MARNZ-REEL 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…
