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Analog Devices Inc./Maxim Integrated ICM7555ESA
- Part No.:
- ICM7555ESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Programmable Timers and Oscillators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICM7555ESA.pdf
- Description:
- IC OSC SGL TIMER 500KHZ 8-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,640
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Product details
Overview
ICM7555ESA from Analog Devices is a single, low-power CMOS timer IC designed as a precision replacement for bipolar 555 timers in battery-powered and low-current timing applications. It operates from 2V to 18V, draws as little as 30µA supply current at 2V, features picoamp-level trigger/threshold currents (≤10pA at 5V), and delivers 500kHz guaranteed maximum oscillation frequency in astable mode.
For engineers reviewing the ICM7555ESA datasheet, ICM7555ESA pinout, ICM7555ESA application, or ICM7555ESA equivalent, this device is selected for ultra-low quiescent current timing, high-impedance RC network compatibility, rail-to-rail CMOS output drive, and latchup-protected operation across industrial temperature ranges.
Technical Context
The ICM7555ESA implements a dual-comparator + SR flip-flop architecture with high-impedance CMOS inputs and push-pull output stage. Its internal voltage dividers set precise 1/3 V+ and 2/3 V+ thresholds, enabling accurate monostable pulse width (t = 1.1·R·C) and astable frequency (f = 1.46/(RA + 2RB)·C) generation without external trimming.
Unlike bipolar 555s, it eliminates supply crowbarring during output transitions (<3mA spike vs. 300–400mA), removes need for power-supply decoupling capacitors, and supports direct control voltage modulation without pin decoupling-enabled by sub-100pA input leakage and guaranteed THRESHOLD/RESET trip points across temperature and supply voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2V to 18V - supports single-cell Li-ion, multi-cell alkaline, and industrial 12V rails without regulation |
| Supply Current (Typ) | 30µA at 2V - enables >10-year battery life in low-duty-cycle wake-up timers |
| Trigger Current (Max) | 10pA at 5V - permits use of >10MΩ timing resistors without accuracy degradation |
| Output Sink/Source | 3.2mA sink / 2.0mA source - directly drives TTL loads and small MOSFET gates |
| Max Oscillation Frequency | 500kHz - sufficient for PWM control, ultrasonic drivers, and fast sequential timing |
| Timing Accuracy (Initial) | ±2.0% to ±5.0% - stable enough for precision delay generators without calibration |
| Operating Temperature | –40°C to +85°C - qualified for automotive cabin, industrial controls, and outdoor electronics |
Pinout & Package
ICM7555ESA is housed in an 8-pin SO (Small Outline) package per outline S8-2 (land pattern 90-0096), with gull-wing leads, RoHS-compliant finish, and 1.27mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Common return for all internal circuitry and external timing components |
| 2 (TRIG) | Trigger comparator input | Active-low edge-sensitive input; triggers monostable on voltage drop below 1/3 V+ |
| 3 (OUT) | CMOS output driver | Push-pull stage delivering rail-to-rail swing (0.15V low / 4.5V high at 5V) |
| 4 (RESET) | Asynchronous reset | High-impedance active-high input overriding TRIG/THRESHOLD; trips at 0.4–1.2V |
| 5 (CV) | Control voltage input | Direct access to internal voltage divider node; modulates threshold levels for FM or variable delay |
| 6 (THRES) | Threshold comparator input | Voltage-sensing input; resets monostable when rising above 2/3 V+ |
| 7 (DIS) | Discharge switch collector | Open-drain NMOS switch tied to GND; discharges external timing capacitor |
| 8 (V+) | Positive supply | Power input supporting wide 2–18V range; powers comparators, logic, and output stage |
Key Features
| Feature | Design Value |
|---|---|
| No supply crowbarring | Eliminates need for local 10µF decoupling capacitor - reduces BOM count and PCB area |
| Sub-100pA input leakage | Enables high-Z RC networks (>100MΩ·pF) with minimal timing drift over temperature |
| Rail-to-rail CMOS output | Delivers full V+ swing at load - compatible with 3.3V/5V logic families without level shifters |
| Guaranteed max 500kHz freq | Validated performance ceiling for stable oscillator design - no derating required |
| Latchup protection | SCR-immune layout prevents destructive conduction when inputs exceed V+ +0.3V |
Applications
| Pulse Width Modulation (PWM) Generator | Missing Pulse Detector |
|---|---|
Use Scenario: Generating variable-duty-cycle signals to control LED brightness or motor speed in portable devices. IC Role / Device Role / Timing Role: Astable multivibrator configured with potentiometer-adjustable RA/RB to vary duty cycle from 1% to 99%. Use Value: Ultra-low 30µA quiescent current extends battery runtime while maintaining 500kHz switching capability for smooth dimming control. | Use Scenario: Monitoring serial data streams or sensor pulses in safety-critical systems where loss-of-signal must trigger alarm. IC Role / Device Role / Timing Role: Monostable one-shot triggered by each incoming pulse; missing pulse causes timeout and activates fault output. Use Value: Picoampere-level trigger sensitivity ensures reliable detection even with weak or high-impedance pulse sources. |
| Precision Time Delay Generator | Sequential Timing Controller |
Use Scenario: Introducing calibrated delays between microcontroller wake-up and peripheral activation in energy-harvesting nodes. IC Role / Device Role / Timing Role: Monostable mode with 1.1·R·C timing equation; R and C selected for ±2% delay accuracy over –40°C to +85°C. Use Value: Initial timing error ≤5% and <100ppm/°C drift ensure consistent delay across operating temperature without software compensation. | Use Scenario: Coordinating multi-stage power-up sequencing in FPGA-based instrumentation systems. IC Role / Device Role / Timing Role: Cascaded monostable stages using DIS and OUT pins to generate staggered enable signals with precise inter-stage intervals. Use Value: High-impedance THRES/TRIG inputs prevent loading between stages, preserving timing integrity across 3+ sequential events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar timer IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NE555P | Bipolar process; 3–6mA supply current; 300–400mA crowbar spikes; ±15% timing accuracy | Requires decoupling caps, heatsinking at high freq; unsuitable for battery life >1 year | Select only if legacy design reuse or cost-driven low-volume production is required |
| TLC555CP | CMOS process; 100µA typical supply current; 2MHz max freq; same 8-pin SO package | Higher current draw limits battery life; higher max frequency allows faster PWM but less stable at low V+ | Prefer when higher speed is needed and 100µA quiescent current is acceptable |
Compared with NE555P and TLC555CP, the ICM7555ESA delivers the lowest supply current (30µA), tightest initial timing accuracy (±2%), and highest immunity to supply noise-making it optimal for long-life, precision, and noise-sensitive timing designs.
Availability
ICM7555ESA is available at Aetrix Electronics and suitable for precision timing, battery-powered instrumentation, industrial control sequencing, and low-power PWM generation requiring stable component supply across extended temperature ranges.
Supply support for ICM7555ESA 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.
The ICM7555ESA belongs to Analog Devices' precision timing IC product line, engineered specifically to replace legacy bipolar 555 timers with CMOS efficiency, accuracy, and reliability in mission-critical timing functions.
FAQ
What is the guaranteed maximum oscillation frequency of the ICM7555ESA?
The ICM7555ESA has a guaranteed maximum oscillation frequency of 500kHz in astable operation, validated across temperature and supply voltage ranges. This specification ensures stable, jitter-free clock generation without derating, making the ICM7555ESA suitable for high-speed PWM and ultrasonic driver applications where timing predictability is essential.
Does the ICM7555ESA require external decoupling capacitors on its power supply?
No, the ICM7555ESA does not require external decoupling capacitors due to its CMOS architecture, which produces only 2–3mA supply current spikes during output transitions-versus 300–400mA in bipolar 555 timers. This eliminates the need for local 10µF bypass caps, reducing BOM cost and PCB footprint while maintaining stable operation in the ICM7555ESA.
What is the trigger input current specification for the ICM7555ESA at 5V supply?
At 5V supply, the ICM7555ESA trigger input current is specified at ≤10pA (typical) and ≤50pA (max), enabling use of ultra-high-impedance timing networks. This ultra-low leakage preserves RC time constant accuracy and allows resistor values exceeding 10MΩ without measurable timing error-critical for long-delay, low-power applications using the ICM7555ESA.
Can the ICM7555ESA operate from a single 2V cell?
Yes, the ICM7555ESA is fully specified to operate from 2V to 18V, including at 2V nominal supply. At 2V, it draws only 30µA typical supply current and maintains functional timing accuracy, making the ICM7555ESA ideal for single-cell lithium or alkaline battery systems where voltage drops near end-of-life.
Is the ICM7555ESA pin-compatible with standard 555 timer ICs in SO-8 package?
Yes, the ICM7555ESA uses the industry-standard 8-pin SO package with identical pinout to NE555, LM555, and TLC555 in SO-8. Pin functions (GND, TRIG, OUT, RESET, CV, THRES, DIS, V+) match exactly-enabling direct drop-in replacement in existing layouts without PCB modification when upgrading to the ICM7555ESA.
ICM7555ESA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- 555 Type, Timer/Oscillator (Single)
- Count:
- -
- Frequency:
- 500kHz
- Voltage - Supply:
- 2V ~ 16.5V
- Current - Supply:
- 30 µA
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ICM7555ESA FAQ
1.How can I place an order for ICM7555ESA through Aetrix?
Please submit a Request for Quotation (RFQ) for ICM7555ESA 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 ICM7555ESA reliable?
The price and inventory of ICM7555ESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICM7555ESA is usually 5 days.
3.What payment methods are accepted for ICM7555ESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICM7555ESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICM7555ESA?
ICM7555ESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICM7555ESA 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 ICM7555ESA?
For technical support, including ICM7555ESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICM7555ESA requirements.
6.How does Aetrix verify that ICM7555ESA is sourced from the original manufacturer or authorized distributors?
All ICM7555ESA 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 ICM7555ESA meets industry standards.
7.What is the process for return or replacement of ICM7555ESA?
All ICM7555ESA units undergo pre-shipment inspection (PSI). If there is an issue with ICM7555ESA, 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 ICM7555ESA part is unused and in its original packaging.
Return procedure for ICM7555ESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ICM7555ESA Tags
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NE555DR
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SA555DR
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NA555DR
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SE555DR
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NE555P
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CD4541BM96
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CD4541BE
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TLC555QDR
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TLC555IDR
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TLC555QDRQ1
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TPL5010DDCR
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TLC555CP
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