My Inquiry
My Account
Analog Devices Inc. ADM8693ARWZ
- Part No.:
- ADM8693ARWZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ADM8693ARWZ.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,625
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADM8693ARWZ from Analog Devices is a 16-lead TSSOP microprocessor supervisory circuit providing precision reset generation (4.4 V threshold), adjustable watchdog timeout (100 ms / 1.6 s / external), battery backup switchover (0.7 Ω on-resistance, 100 mA VOUT drive), CE signal gating (3 ns propagation), and power-fail detection (1.3 V PFI comparator) for embedded industrial control systems.
For engineers reviewing the ADM8693ARWZ datasheet, ADM8693ARWZ pinout, ADM8693ARWZ application, or ADM8693ARWZ equivalent, this page delivers verified functional specifications, validated pin roles, real-world use cases in battery-backed controllers and automotive ECUs, and confirmed alternative parts with documented timing and voltage differences.
Technical Context
The ADM8693ARWZ integrates a precision 4.4 V reset voltage detector with 40 mV hysteresis, an internal/external selectable oscillator (OSC SEL-controlled) enabling configurable reset pulse widths (50 ms or adjustable) and dual-mode watchdog timeout (100 ms short period, 1.6 s long period post-reset), and independent logic outputs including RESET (active low), WDO (watchdog status), BATT ON (battery switchover indicator), and LOW LINE (VCC fault flag).
It implements true automatic battery backup switching with 70 mV switchover threshold on power-up and 50 mV on power-down, plus 20 mV hysteresis to prevent chatter; CEIN-to-CEOUT gating enforces write protection during brownout by forcing CEOUT high when VCC drops below 4.4 V, while the 1.3 V PFI comparator provides early power-fail warning with <1 µs response time.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.4 V nominal (guaranteed 4.25–4.48 V); ensures reliable reset assertion for 5 V ±10% supplies. |
| Watchdog Timeout | 100 ms (short) or 1.6 s (long, default post-reset); externally adjustable via OSC IN capacitor or clock. |
| VOUT Drive Capability | 100 mA continuous; supports direct powering of CMOS RAM without external pass transistor. |
| Battery Switchover On-Resistance | 0.7 Ω (VCC path), 7 Ω (VBATT path); minimizes dropout voltage and enables stable backup operation. |
| CE Gating Propagation Delay | 3 ns typical; guarantees near-instantaneous write disable during supply collapse. |
| Power-Fail Comparator Threshold | 1.3 V (±25 mV over temp); enables precise early-warning detection of 5 V rail collapse. |
| Supply Current (Active) | 140–200 µA; enables low-power operation in always-on monitoring applications. |
| Standby Current (Battery Mode) | 0.4–1 µA at VCC = 0 V; extends lithium or supercapacitor backup runtime significantly. |
Pinout & Package
ADM8693ARWZ is housed in a 16-lead TSSOP package (RW-16 SOIC_W), measuring 4.4 mm × 5.0 mm × 1.2 mm, with exposed pad for thermal enhancement and JEDEC-standard footprint compatible with automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Main power supply input | 5 V nominal supply; powers internal circuitry and sources VOUT during normal operation. |
| VBATT | Backup battery input | Accepts 2.0–4.0 V battery/supercap; automatically selected by internal switch when VCC fails. |
| VOUT | Switched output supply | Delivers VCC or VBATT (whichever higher) to RAM; rated for 100 mA continuous load. |
| GND | Ground reference | Common 0 V return for all analog and digital functions; must be low-impedance connection. |
| RESET | Active-low reset output | Drives microprocessor reset pin low for ≥50 ms after VCC recovery or watchdog timeout. |
| WDI | Watchdog input | Three-level input (low/mid/high); transition resets timer; floating disables watchdog. |
| PFI | Power-fail comparator input | Noninverting input referenced to 1.3 V; asserts PFO low when supply voltage drops. |
| PFO | Power-fail output | Active-low open-drain output signaling imminent VCC failure; used for graceful shutdown. |
| CEIN | Chip enable input | Logic input gated to CEOUT; connects to microcontroller CE/CS/WRITE signal. |
| CEOUT | Gated chip enable output | Replicates CEIN when VCC ≥4.4 V; forced high during brownout to block memory writes. |
| BATT ON | Battery switchover status | Active-high open-drain output indicating VBATT is now sourcing VOUT. |
| LOW LINE | VCC fault flag | Active-low output asserting immediately when VCC falls below 4.4 V (no delay). |
| OSC SEL | Oscillator mode select | High/floating = internal oscillator; low = external clock/capacitor for timing adjustment. |
| OSC IN | Oscillator input | Accepts external clock (0–500 kHz) or 47 pF capacitor to set reset/watchdog timing. |
| WDO | Watchdog status output | Active-low output that stays low until next WDI transition after timeout occurs. |
| RESET (pin 16) | Active-high reset complement | Inverted version of RESET pin; interfaces directly with processors requiring active-high reset. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable reset & watchdog timing | Configurable via OSC SEL/OSC IN: fixed 50 ms/100 ms/1.6 s or capacitor/clock-adjustable periods. |
| True battery switchover with hysteresis | 70 mV turn-on / 50 mV turn-off threshold difference prevents oscillation during slow VCC decay. |
| CMOS RAM write protection | CEIN-to-CEOUT gating forces high during brownout, blocking writes without software intervention. |
| Low-voltage reset assertion | Guaranteed RESET operation down to VCC = 1 V, ensuring controlled shutdown even during deep brownout. |
| Integrated power-fail warning | 1.3 V PFI comparator with sub-µs response enables preemptive data save before full VCC collapse. |
| High-current VOUT drive | 100 mA capability eliminates need for external pass transistor in most RAM backup designs. |
Applications
| Industrial PLC Controller | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Maintains volatile configuration data in SRAM during engine start-stop cycles where 12 V battery dips to 6–7 V. IC Role / Device Role / Timing Role: Supervisory IC providing brownout reset, battery-backed RAM power, and write-protection gating during voltage sag. Use Value: Prevents corrupted firmware state by disabling writes and asserting reset before VCC falls below microcontroller operational minimum. |
Use Scenario: Secures door lock actuator calibration data across ignition cycles using coin-cell backup. IC Role / Device Role / Timing Role: Dual-role supervisor: manages 5 V rail integrity and gates EEPROM write lines during cranking-induced voltage drop. Use Value: Eliminates need for external PNP transistor and discrete comparator, reducing BOM count and PCB area. |
| Medical Infusion Pump | Smart Energy Meter |
Use Scenario: Preserves dosage history and alarm logs in battery-backed RAM during AC mains interruption. IC Role / Device Role / Timing Role: Power monitor + watchdog + CE gate ensuring data integrity and safe motor shutdown on power loss. Use Value: 3 ns CEOUT propagation guarantees immediate write disable, preventing partial record corruption during fast transients. |
Use Scenario: Enables tamper-proof time-of-use billing data storage during grid outages using supercapacitor backup. IC Role / Device Role / Timing Role: Supervisor with PFI-based early warning triggers flash save routine before VCC drops below 4.4 V. Use Value: 1.3 V PFI threshold allows >100 ms advance notice before 5 V rail collapse, enabling full data commit. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM8691ARWZ | Identical pinout and package; reset threshold 4.65 V (vs. 4.4 V), wider VBATT range (2.0–4.25 V vs. 2.0–4.0 V). | Suitable for 5 V ±5% systems; less tolerant of low-VCC brownout but better for higher-voltage backup cells. | Select ADM8691ARWZ when system uses 4.5–5.5 V regulated supply and lithium primary battery >4.0 V. |
| MAX693ESA+ | Maxim Integrated part; 4.63 V reset threshold, fixed 200 ms reset timeout, no adjustable watchdog, no CE gating. | Lacks RAM write protection and timing flexibility; suited for simple reset-only applications. | Choose MAX693ESA+ only if design requires minimal feature set, fixed timing, and compatibility with legacy Maxim footprints. |
Compared with ADM8693ARWZ, ADM8691ARWZ offers higher reset threshold and extended battery voltage support but identical functionality, while MAX693ESA+ omits CE gating and adjustable timing-making it unsuitable for systems requiring write protection or custom watchdog intervals.
Availability
ADM8693ARWZ is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical infusion pumps, and smart energy meters requiring stable component supply with guaranteed long-term availability.
Supply support for ADM8693ARWZ 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, serving industrial, automotive, communications, and healthcare markets since 1965.
The ADM869x family was designed specifically for robust microprocessor supervision in harsh environments-delivering integrated reset, watchdog, battery switchover, and memory protection in a single IC for space-constrained embedded systems.
FAQ
What is the guaranteed reset voltage threshold range for ADM8693ARWZ?
The ADM8693ARWZ has a guaranteed reset voltage threshold range of 4.25 V to 4.48 V at temperature extremes, with a nominal value of 4.4 V. This specification ensures reliable reset assertion for 5 V ±10% power supplies across the full industrial temperature range (−40°C to +85°C). The 40 mV hysteresis prevents chatter during slow VCC transitions. This threshold is fixed and not user-adjustable on the ADM8693ARWZ.
Does ADM8693ARWZ support adjustable watchdog timeout, and how is it configured?
Yes, ADM8693ARWZ supports three watchdog timeout modes: fixed 100 ms, fixed 1.6 s (default immediately after reset), or externally adjustable via OSC SEL and OSC IN. With OSC SEL low, an external capacitor (e.g., 47 pF) on OSC IN sets timeout as 1.6 s × C/47 pF; with external clock input, timeout equals 4096 clock cycles. Configuration is hardware-based-no firmware required-and fully documented in the Rev. B datasheet Figure 17–20.
Can ADM8693ARWZ drive CMOS RAM directly without external components?
Yes, ADM8693ARWZ can drive CMOS RAM directly: its VOUT pin delivers up to 100 mA with ≤0.2 V dropout at full load, eliminating the need for an external pass transistor in most designs. For peak current demands exceeding 100 mA, the BATT ON output can drive an external PNP transistor. A 0.1 µF bypass capacitor on VOUT is recommended to handle transient RAM current spikes, as specified in the datasheet Circuit Information section.
How does the CEIN-to-CEOUT gating function protect memory during brownout?
The ADM8693ARWZ forces CEOUT high whenever VCC drops below the 4.4 V reset threshold-regardless of CEIN state-blocking write operations to attached CMOS RAM or EEPROM. This hardware-enforced gating has a 3 ns propagation delay, ensuring immediate write disable before supply collapse corrupts data. The function operates independently of processor activity, making it effective even during complete MCU lockup or power interruption.
What is the battery backup voltage range supported by ADM8693ARWZ?
ADM8693ARWZ supports a VBATT input range of 2.0 V to 4.0 V, optimized for common backup sources including lithium coin cells (3.0 V), rechargeable Li-ion (3.6–4.0 V), and supercapacitors (2.5–3.5 V). The device draws only 0.4–1 µA in battery-backup mode (VCC = 0 V), enabling multi-year operation on standard CR2032 cells. Charging current from VBATT is limited to ±0.1 µA, safe for all lithium chemistries.
ADM8693ARWZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.4V
- Output:
- Push-Pull, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 35ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
ADM8693ARWZ FAQ
1.How can I place an order for ADM8693ARWZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM8693ARWZ 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 ADM8693ARWZ reliable?
The price and inventory of ADM8693ARWZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM8693ARWZ is usually 5 days.
3.What payment methods are accepted for ADM8693ARWZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM8693ARWZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM8693ARWZ?
ADM8693ARWZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM8693ARWZ 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 ADM8693ARWZ?
For technical support, including ADM8693ARWZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM8693ARWZ requirements.
6.How does Aetrix verify that ADM8693ARWZ is sourced from the original manufacturer or authorized distributors?
All ADM8693ARWZ 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 ADM8693ARWZ meets industry standards.
7.What is the process for return or replacement of ADM8693ARWZ?
All ADM8693ARWZ units undergo pre-shipment inspection (PSI). If there is an issue with ADM8693ARWZ, 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 ADM8693ARWZ part is unused and in its original packaging.
Return procedure for ADM8693ARWZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADM8693ARWZ 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…
