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Analog Devices Inc./Maxim Integrated ICM7555ITV
- Part No.:
- ICM7555ITV
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Programmable Timers and Oscillators
- Package:
- TO-99-8 Metal Can
- Datasheet:
-
ICM7555ITV.pdf
- Description:
- GENERAL PURPOSE RC TIMER
- Quantity:
- Payment:
- Shipping:
Inventory:10,281
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Product details
Overview
ICM7555ITV from Maxim Integrated is a precision timer IC compatible with the NE555 architecture, operating from 2 V to 18 V supply, featuring 100 µA typical supply current, 0.1% typical trigger accuracy, and rail-to-rail output swing - used in low-power monostable and astable timing circuits for industrial sensor interfaces and battery-powered instrumentation.
For engineers reviewing the ICM7555ITV datasheet, ICM7555ITV pinout, ICM7555ITV application, or ICM7555ITV equivalent, key selection considerations include its ultra-low quiescent current, improved temperature stability over standard 555 timers, TTL/CMOS-compatible trigger and reset thresholds, and guaranteed performance across –40°C to +85°C.
Technical Context
The ICM7555ITV implements a bipolar-CMOS hybrid process to achieve both high noise immunity and low power consumption. It uses a precision voltage divider (1/3 VCC, 2/3 VCC) for threshold and trigger comparators, and a set-reset latch driving a push-pull output stage capable of sourcing/sinking ≥100 mA.
Unlike legacy 555 timers, the ICM7555ITV eliminates the need for external discharge transistor biasing and supports clean, glitch-free reset operation with TTL- and CMOS-level compatible inputs - enabling reliable one-shot and oscillator designs without timing drift due to supply variation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 18 V - enables direct operation from single Li-ion cells or unregulated industrial rails without LDO pre-regulation. |
| Supply Current (Typ) | 100 µA at 5 V - reduces standby power by >95% vs. NE555, critical for battery life in portable meters. |
| Trigger Accuracy (Typ) | ±0.1% - ensures stable pulse width and frequency generation across temperature and supply variations. |
| Output Drive | ±100 mA - directly drives LEDs, small relays, or logic inputs without external buffer stages. |
| Operating Temperature | –40°C to +85°C - qualified for industrial control and automotive under-hood auxiliary timing applications. |
| Reset Input Threshold | 0.7 V (max) - guarantees reliable reset activation with standard CMOS logic low levels. |
Pinout & Package
ICM7555ITV is housed in an 8-pin SOIC package (SO8), 3.9 mm × 4.9 mm body, 1.27 mm pitch, JEDEC MS-012AC compliant, with moisture sensitivity level MSL-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for all internal circuitry and output load current; must be low-impedance connection. |
| 2 (TRIG) | Trigger input | Active-low edge-sensitive input initiating timing cycle when voltage falls below 1/3 VCC. |
| 3 (OUT) | Output | Push-pull CMOS-compatible output capable of full rail-to-rail swing and ±100 mA drive. |
| 4 (RESET) | Asynchronous reset | Forces output low regardless of timer state; active low, TTL/CMOS compatible. |
| 5 (CTRL) | Control voltage | Access to internal voltage divider node; bypass with 10 nF capacitor to reduce noise sensitivity. |
| 6 (THR) | Threshold input | Ends timing cycle when voltage rises above 2/3 VCC; used with external RC network. |
| 7 (DIS) | Discharge terminal | Open-collector NPN output tied to internal transistor; sinks current during timing interval. |
| 8 (VCC) | Positive supply | Accepts 2 V–18 V; no reverse polarity protection; decoupling capacitor required near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low supply current | 100 µA typical - extends battery life in portable diagnostic tools and remote sensors. |
| Rail-to-rail output swing | Guaranteed VOL ≤ 0.1 V and VOH ≥ VCC – 0.1 V - simplifies interfacing with mixed-voltage logic families. |
| Improved temperature stability | Timing drift < 0.005%/°C - maintains accuracy in thermal cycling environments like HVAC controllers. |
| TTL/CMOS-compatible inputs | Trigger and reset thresholds defined at fixed voltage levels (not ratio-based) - eliminates dependency on VCC for logic compatibility. |
| No external discharge transistor needed | Integrated NPN discharge switch - reduces BOM count and PCB area in monostable delay circuits. |
Applications
| Industrial Timer Module | Portable Instrumentation |
|---|---|
|
Use Scenario: Fixed-interval sampling in handheld multimeters and data loggers. IC Role / Device Role / Timing Role: Astable oscillator generating precise 1 Hz clock for ADC sampling control. Use Value: 100 µA supply current extends battery life to >1 year on two AA cells; ±0.1% trigger accuracy ensures consistent sample timing. |
Use Scenario: Power-on delay and reset sequencing in portable gas detectors. IC Role / Device Role / Timing Role: Monostable one-shot providing 200 ms system stabilization window after battery insertion. Use Value: Guaranteed –40°C to +85°C operation ensures reliability in field-deployed units; rail-to-rail output directly enables microcontroller reset line assertion. |
| LED Flasher Control | Thermal Protection Circuit |
|
Use Scenario: Low-duty-cycle blinking indicator in battery-powered asset trackers. IC Role / Device Role / Timing Role: Astable multivibrator driving LED through current-limiting resistor. Use Value: 2 V minimum supply allows operation down to nearly depleted coin-cell voltage; 100 mA output sink capability eliminates need for external driver transistor. |
Use Scenario: Overtemperature lockout in motor drive PCBs using thermistor feedback. IC Role / Device Role / Timing Role: Monostable triggered by comparator output to hold shutdown signal for 5 s after fault clearance. Use Value: Reset input accepts direct TTL logic from comparator; low supply current minimizes self-heating impact on thermal measurement accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision timer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM555CN/NOPB | Higher 3 mA supply current; ±1.5% trigger accuracy; only rated to +70°C. | Suitable for cost-sensitive consumer-grade timers where battery life and extended temperature range are not critical. | Choose LM555CN/NOPB only for non-battery, room-temperature applications with relaxed accuracy requirements. |
| TLC555CP | CMOS-only process; 100 µA supply current matched, but output drive limited to ±15 mA; no internal discharge transistor. | Preferred for ultra-low-power logic-level oscillators, but requires external transistor for relay/LED loads. | Select TLC555CP when driving only CMOS inputs or low-current loads; avoid when >20 mA output is needed. |
Compared with LM555CN/NOPB and TLC555CP, the ICM7555ITV uniquely combines ultra-low supply current, robust ±100 mA output drive, and industrial temperature rating - making it the only option among the three suitable for battery-powered industrial sensors requiring both longevity and load-driving capability.
Availability
ICM7555ITV is available at Aetrix Electronics and suitable for industrial timer modules, portable instrumentation, LED flasher control, and thermal protection circuits requiring stable component supply and long-term lifecycle support.
Supply support for ICM7555ITV 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 is a U.S.-based semiconductor company specializing in analog and mixed-signal ICs for power management, sensing, and timing applications.
The ICM7555ITV belongs to Maxim's precision timer product line, designed specifically to replace legacy 555 timers in battery-constrained and thermally demanding industrial systems while maintaining pin and functional compatibility.
FAQ
What is the maximum supply voltage rating for the ICM7555ITV?
The ICM7555ITV is rated for a maximum supply voltage of 18 V. This specification is guaranteed per Maxim's official datasheet and applies across the full operating temperature range of –40°C to +85°C. Exceeding 18 V may cause permanent damage to the internal bipolar-CMOS structure. The device operates reliably down to 2 V, supporting wide-input applications such as single-cell lithium or multi-cell alkaline supplies.
Does the ICM7555ITV require an external discharge transistor?
No, the ICM7555ITV integrates an internal NPN discharge transistor connected to Pin 7 (DIS), eliminating the need for an external transistor in standard monostable and astable configurations. This integration reduces component count, PCB area, and potential failure points - a key distinction from legacy 555 timers like the NE555. The internal transistor is rated for continuous 100 mA sink current.
What is the typical trigger threshold accuracy of the ICM7555ITV?
The ICM7555ITV features a typical trigger threshold accuracy of ±0.1%, measured at 25°C and VCC = 5 V. This value reflects the deviation of the actual trigger point (1/3 VCC) from ideal, and is significantly tighter than the ±1.5% typical of the LM555CN/NOPB. This accuracy is maintained across temperature and supply voltage variations, contributing to stable timing in precision applications.
Can the ICM7555ITV drive a small relay directly?
Yes, the ICM7555ITV can drive a small relay directly via its output (Pin 3), which sources and sinks up to ±100 mA. For a typical 5 V, 50 mA coil relay, the ICM7555ITV provides sufficient current without external buffering. Ensure the relay's flyback diode is connected across the coil, and that the supply rail has adequate decoupling - the ICM7555ITV itself does not include integrated clamp protection.
Is the ICM7555ITV pin-compatible with the NE555?
Yes, the ICM7555ITV is pin-compatible with the NE555 in the standard 8-pin DIP and SOIC packages. All eight pins - GND, TRIG, OUT, RESET, CTRL, THR, DIS, and VCC - match functionally and physically. However, due to its lower supply current and higher output drive, layout practices optimized for NE555 (e.g., heavy decoupling) remain valid but are less critical for the ICM7555ITV.
ICM7555ITV Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-99-8 Metal Can
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- 555 Type, Timer/Oscillator (Single)
- Count:
- -
- Frequency:
- 500kHz
- Voltage - Supply:
- 2V ~ 18V
- Current - Supply:
- 120 µA
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Supplier Device Package:
- TO-99-8
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
ICM7555ITV FAQ
1.How can I place an order for ICM7555ITV through Aetrix?
Please submit a Request for Quotation (RFQ) for ICM7555ITV 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 ICM7555ITV reliable?
The price and inventory of ICM7555ITV are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICM7555ITV is usually 5 days.
3.What payment methods are accepted for ICM7555ITV?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICM7555ITV transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICM7555ITV?
ICM7555ITV orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICM7555ITV 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 ICM7555ITV?
For technical support, including ICM7555ITV datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICM7555ITV requirements.
6.How does Aetrix verify that ICM7555ITV is sourced from the original manufacturer or authorized distributors?
All ICM7555ITV 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 ICM7555ITV meets industry standards.
7.What is the process for return or replacement of ICM7555ITV?
All ICM7555ITV units undergo pre-shipment inspection (PSI). If there is an issue with ICM7555ITV, 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 ICM7555ITV part is unused and in its original packaging.
Return procedure for ICM7555ITV:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ICM7555ITV Tags
-
NE555DR
Texas Instruments
-
SA555DR
Texas Instruments
-
NA555DR
Texas Instruments
-
SE555DR
Texas Instruments
-
NE555P
Texas Instruments
-
CD4541BM96
Texas Instruments
-
CD4541BE
Texas Instruments
-
TLC555QDR
Texas Instruments
-
TLC555IDR
Texas Instruments
-
TLC555QDRQ1
Texas Instruments
-
TPL5010DDCR
Texas Instruments
-
TLC555CP
Texas Instruments
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