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NXP Semiconductors ICM7555ID/DG,112
- Part No.:
- ICM7555ID/DG,112
- Manufacturer:
- NXP Semiconductors
- Category:
- Programmable Timers and Oscillators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICM7555ID/DG,112.pdf
- Description:
- IC OSC SINGLE TIMER 500KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,411
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Product details
Overview
ICM7555ID/DG,112 from NXP Semiconductors is a CMOS precision timer IC operating as a direct functional replacement for NE/SE555 in monostable and astable modes, with 80 µA typical supply current, 20 pA typical trigger/threshold/reset input currents, rail-to-rail output swing, and guaranteed 500 kHz oscillator frequency across −40 °C to +85 °C. It enables accurate time delays from microseconds to hours in automotive-grade timing circuits.
For engineers reviewing the ICM7555ID/DG,112 datasheet, ICM7555ID/DG,112 pinout, ICM7555ID/DG,112 application, or ICM7555ID/DG,112 equivalent, this page delivers verified package mapping (SO8), validated pin functions, confirmed automotive temperature range (−40 °C to +85 °C), real-world timing stability (0.005 %/°C), and precise alternative part comparisons - all extracted from NXP's official 2009 product data sheet.
Technical Context
The ICM7555ID/DG,112 implements dual high-impedance CMOS comparators feeding an SR flip-flop, with independent control of threshold (2/3 VDD) and trigger (1/3 VDD) trip points. Its discharge transistor operates as an open-drain switch tied to pin 7, while the output stage is a push-pull CMOS inverter capable of sourcing/sinking ≥3.2 mA at 5 V.
No internal crowbar current exists during output transitions, eliminating mandatory supply decoupling capacitors required by bipolar 555 timers. The CONTROL_VOLTAGE pin (pin 5) allows external modulation of internal comparator thresholds, enabling voltage-controlled oscillation or delay adjustment without added circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage range | 3 V to 16 V - supports single-supply operation across battery, industrial, and automotive rails without level-shifting. |
| Supply current (typ.) | 80 µA - enables ultra-low-power timing in always-on or energy-constrained systems. |
| Input leakage (typ.) | 20 pA on TRIGGER/THRESHOLD/RESET - permits use of high-value timing resistors (>10 MΩ) for hour-scale delays. |
| Oscillator frequency | Guaranteed 500 kHz - ensures reliable high-speed pulse generation without external buffering. |
| Output drive | Rail-to-rail swing, ±1 mA source/sink - directly interfaces TTL and CMOS logic without pull-ups or level translators. |
| Temp. stability | 0.005 %/°C at 25 °C - provides predictable timing accuracy over full −40 °C to +85 °C automotive range. |
| Timing modes | Monostable and astable - supports both one-shot pulses and free-running oscillation with adjustable duty cycle. |
Pinout & Package
ICM7555ID/DG,112 is supplied in an SO8 (SOT96-1) plastic small outline package: 8-lead, 3.9 mm body width, 1.27 mm lead pitch, surface-mount compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Supply reference ground | Return path for all internal circuitry; must be low-impedance connection to system ground plane. |
| TRIGGER (Pin 2) | Monostable start input | Active-LOW edge-sensitive input; initiates timing cycle when voltage drops below 1/3 VDD. |
| OUTPUT (Pin 3) | Logic-level output driver | Push-pull CMOS output; drives TTL loads directly and swings rail-to-rail across full supply range. |
| RESET (Pin 4) | Timer inhibit input | Active-LOW asynchronous reset; forces OUTPUT LOW and DISCHARGE ON regardless of other inputs. |
| CONTROL_VOLTAGE (Pin 5) | Comparator threshold reference | Externally sets internal trip points; eliminates need for decoupling capacitor in most applications. |
| THRESHOLD (Pin 6) | Capacitor voltage sense (upper) | Monitors timing capacitor voltage; triggers reset when >2/3 VDD in monostable or astable mode. |
| DISCHARGE (Pin 7) | Timing capacitor discharge switch | Open-drain NMOS switch; sinks current to ground to discharge external timing capacitor. |
| VDD (Pin 8) | Positive supply input | Accepts 3–16 V DC; no internal regulation - requires stable input within absolute max limits (≤18 V). |
Key Features
| Feature | Design Value |
|---|---|
| NE/SE555 drop-in compatibility | Pin- and function-compatible with legacy 555 timers, enabling direct PCB replacement without layout changes. |
| No supply decoupling required | Eliminates mandatory 100 nF ceramic capacitor at VDD/GND due to absence of crowbar current during switching. |
| High-impedance timing inputs | 20 pA leakage enables microampere-level timing networks, reducing power and enabling long time constants. |
| Adjustable astable duty cycle | Duty cycle δ = (RA + RB)/(RA + 2RB) - precisely controlled via two external resistors, not fixed at 50 %. |
| Rail-to-rail output | VOH ≥ VDD − 0.4 V and VOL ≤ 0.4 V at 5 V - ensures full logic swing into CMOS and robust TTL interfacing. |
Applications
| Automotive Engine Control Timing | Industrial Sensor Pulse Conditioning |
|---|---|
Use Scenario: Generating precise ignition timing pulses or fuel injector dwell control signals in engine control units under wide temperature and voltage variation. IC Role / Device Role / Timing Role: Monostable one-shot generating fixed-width gate pulses synchronized to crankshaft position sensor edges. Use Value: 0.005 %/°C temperature stability and −40 °C to +85 °C rating ensure consistent pulse width across engine bay thermal extremes. |
Use Scenario: Converting slow-varying analog sensor outputs (e.g., pressure, temperature) into clean digital pulses for microcontroller capture. IC Role / Device Role / Timing Role: Astable multivibrator converting analog threshold crossings into standardized pulse trains for digital signal processing. Use Value: 20 pA input leakage allows high-impedance RC networks that reject EMI while maintaining timing integrity in noisy factory environments. |
| Medical Instrument Clock Generation | Consumer Appliance Sequential Logic |
Use Scenario: Providing stable clock signals for low-power portable diagnostic devices where battery life and timing accuracy are critical. IC Role / Device Role / Timing Role: Astable oscillator driving microcontroller peripherals or display refresh logic at fixed frequency. Use Value: 80 µA supply current extends battery runtime; 500 kHz max frequency supports responsive UI updates without external crystal. |
Use Scenario: Implementing timed sequences in washing machines, microwaves, or HVAC controllers using minimal external components. IC Role / Device Role / Timing Role: Monostable timer triggering relay activation, motor direction reversal, or LED blink patterns based on user input. Use Value: Direct NE/SE555 replacement allows reuse of existing schematics and BOMs while improving reliability and reducing component count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar timer IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NE555DR | Bipolar process; 10 mA supply current; 500 nA input leakage; requires VDD decoupling and CV pin capacitor. | Higher power consumption and lower timing accuracy limit use in battery-powered or precision systems. | Select only if legacy design reuse mandates identical bipolar behavior or cost sensitivity outweighs performance gains. |
| LMC555IMX/NOPB | CMOS process like ICM7555; 100 µA supply current; 0.1 pA input leakage; same SO8 footprint but different pinout (RESET and CONTROL_VOLTAGE swapped). | Pinout incompatibility prevents direct replacement; requires PCB redesign or adapter. | Choose when ultra-low leakage (<0.1 pA) is critical and board layout can accommodate pin reassignment. |
Compared with NE555DR and LMC555IMX/NOPB, the ICM7555ID/DG,112 uniquely combines automotive temperature rating, guaranteed 500 kHz operation, and true pin-for-pin compatibility with legacy 555 designs - delivering lowest-risk migration path for reliability-critical timing upgrades.
Availability
ICM7555ID/DG,112 is available at Aetrix Electronics and suitable for automotive engine control, industrial sensor conditioning, medical instrument clocking, and consumer appliance sequential timing requiring stable component supply across extended temperature ranges.
Supply support for ICM7555ID/DG,112 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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The ICM7555ID/DG,112 belongs to NXP's general-purpose analog timer product line, designed specifically to replace legacy bipolar 555 timers with enhanced CMOS performance while preserving pinout and functional equivalence for seamless design migration.
FAQ
What is the operating temperature range of the ICM7555ID/DG,112?
The ICM7555ID/DG,112 is rated for operation from −40 °C to +85 °C, meeting automotive-grade environmental requirements. This specification is explicitly defined in Table 1 of the NXP datasheet under the "ICM7555ID" ordering variant and confirmed by its qualification to full automotive temperature testing per JEDEC standards.
Does the ICM7555ID/DG,112 require a decoupling capacitor on the CONTROL_VOLTAGE pin?
No, the ICM7555ID/DG,112 does not require a decoupling capacitor on the CONTROL_VOLTAGE (pin 5) due to its CMOS input structure and extremely high input impedance (20 pA typical leakage). Section 11.1 of the NXP datasheet explicitly states that CONTROL_VOLTAGE decoupling capacitors are "not required since the input impedance of the CMOS comparators on chip are very high."
Can the ICM7555ID/DG,112 directly replace a NE555 in an existing PCB layout?
Yes, the ICM7555ID/DG,112 is a pin-for-pin and functionally compatible replacement for the NE555 in most applications. Its SO8 package (SOT96-1) matches the physical footprint, and all pin functions align identically - including GND (1), TRIGGER (2), OUTPUT (3), RESET (4), CONTROL_VOLTAGE (5), THRESHOLD (6), DISCHARGE (7), and VDD (8).
What is the maximum supply voltage the ICM7555ID/DG,112 can tolerate?
The absolute maximum supply voltage for the ICM7555ID/DG,112 is 18 V, as specified in Table 4 ("Limiting values") of the NXP datasheet. Continuous operation above 16 V is not recommended; the device is characterized and guaranteed for stable operation from 3 V to 16 V across its full temperature range.
How does the ICM7555ID/DG,112 achieve improved timing stability compared to the NE555?
The ICM7555ID/DG,112 achieves 0.005 %/°C typical temperature stability through its CMOS process, which eliminates thermal drift mechanisms inherent in bipolar 555 timers. Its high-impedance inputs reduce sensitivity to resistor self-heating, and rail-to-rail output minimizes voltage-dependent timing errors - all confirmed in Table 5 and Figure 11 of the NXP datasheet.
ICM7555ID/DG,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- 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:
- 3V ~ 16V
- Current - Supply:
- 180 µA
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-SO
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ICM7555ID/DG,112 FAQ
1.How can I place an order for ICM7555ID/DG,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for ICM7555ID/DG,112 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 ICM7555ID/DG,112 reliable?
The price and inventory of ICM7555ID/DG,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICM7555ID/DG,112 is usually 5 days.
3.What payment methods are accepted for ICM7555ID/DG,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICM7555ID/DG,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICM7555ID/DG,112?
ICM7555ID/DG,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICM7555ID/DG,112 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 ICM7555ID/DG,112?
For technical support, including ICM7555ID/DG,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICM7555ID/DG,112 requirements.
6.How does Aetrix verify that ICM7555ID/DG,112 is sourced from the original manufacturer or authorized distributors?
All ICM7555ID/DG,112 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 ICM7555ID/DG,112 meets industry standards.
7.What is the process for return or replacement of ICM7555ID/DG,112?
All ICM7555ID/DG,112 units undergo pre-shipment inspection (PSI). If there is an issue with ICM7555ID/DG,112, 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 ICM7555ID/DG,112 part is unused and in its original packaging.
Return procedure for ICM7555ID/DG,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ICM7555ID/DG,112 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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