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NXP Semiconductors ICM7555ID,623
- Part No.:
- ICM7555ID,623
- Manufacturer:
- NXP Semiconductors
- Category:
- Programmable Timers and Oscillators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICM7555ID,623.pdf
- Description:
- IC OSC SGL TIMER 500KHZ 8-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,808
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Product details
Overview
ICM7555ID,623 from NXP Semiconductors is a CMOS precision timer IC operating as a direct functional replacement for NE/SE555 in most circuits, delivering 80 µA typical supply current, 20 pA typical trigger/threshold/reset input currents, and guaranteed 500 kHz oscillator frequency across −40 °C to +85 °C. It supports both monostable (time delay) and astable (oscillator) modes with rail-to-rail output swing and no crowbarring supply current during transitions-enabling low-power sensor timing and industrial pulse generation.
For engineers reviewing the ICM7555ID,623 datasheet, ICM7555ID,623 pinout, ICM7555ID,623 application, or ICM7555ID,623 equivalent, this page provides verified pin functions, automotive-grade temperature performance (−40 °C to +85 °C), SO8 package details, real-world timing accuracy (±1.0% frequency stability), and validated alternatives for legacy 555-based designs requiring lower power and higher impedance timing networks.
Technical Context
The ICM7555ID,623 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.
Unlike bipolar 555 timers, it eliminates supply current crowbarring during output transitions and removes the need for CONTROL_VOLTAGE decoupling due to >1012 Ω input impedance. Timing accuracy is maintained over 3 V–16 V supply range with ±50 ppm/°C temperature coefficient at 5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 3 V to 16 V - enables operation from single Li-ion battery (3.7 V) up to industrial 12 V rails without regulation |
| Supply current | 80 µA typical - reduces standby power by >99% vs. NE555 (≈10 mA), critical for battery-powered timers |
| Input leakage current | 20 pA typical on TRIGGER/THRESHOLD/RESET - allows use of >10 MΩ timing resistors for hour-scale delays |
| Oscillator frequency | 500 kHz guaranteed - supports high-speed PWM generation and ultrasonic driver circuits |
| Output drive | Rail-to-rail swing, ±3.2 mA sink/source at 5 V - directly interfaces TTL and 74HC CMOS logic without level shifters |
| Temperature range | −40 °C to +85 °C - qualified for automotive under-hood and industrial control environments |
| Frequency stability | ±1.0% - ensures consistent timing across voltage and temperature in precision delay applications |
Pinout & Package
ICM7555ID,623 is supplied in an SO8 (SOT96-1) plastic small outline package: 8-pin, 3.9 mm body width, 1.27 mm pitch, lead-free compliant. Pin 1 is marked by a beveled corner or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Supply ground reference | Return path for all internal circuitry; must connect to system ground plane with low-inductance trace |
| 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 | CMOS push-pull driver; delivers full VDD–GND swing and drives TTL/CMOS loads directly |
| RESET (Pin 4) | Timer inhibit input | Active-LOW asynchronous reset; forces OUTPUT LOW and DISCHARGE ON regardless of other inputs |
| CONTROL_VOLTAGE (Pin 5) | Internal comparator reference adjust | Modifies threshold/trigger trip points; bypass capacitor not required due to ultra-high input impedance |
| THRESHOLD (Pin 6) | Astable upper timing sense | Detects capacitor voltage reaching 2/3 VDD to terminate charging phase in oscillator mode |
| DISCHARGE (Pin 7) | Timing capacitor discharge path | Open-drain NMOS switch; sinks current to GND during capacitor discharge in astable operation |
| VDD (Pin 8) | Positive supply input | Accepts 3–16 V; no external decoupling needed due to absence of supply current spikes |
Key Features
| Feature | Design Value |
|---|---|
| Direct NE/SE555 replacement | Maintains identical pinout and basic function while eliminating mandatory VCONT decoupling and supply rail decoupling capacitors |
| Ultra-low input bias current | 20 pA typical enables timing networks with >100 MΩ resistors and sub-nF capacitors for microsecond-to-hour delays |
| No supply crowbarring | Eliminates 300–400 mA transient spikes seen in bipolar 555s, removing need for local 100 nF ceramic decoupling |
| Rail-to-rail output | Ensures full logic swing across entire 3–16 V supply range, simplifying interface with mixed-voltage systems |
| Adjustable duty cycle | Supported in astable mode via separate RA/RB timing resistors - enables precise PWM generation without external logic |
Applications
| Precision Timing | Pulse Generation |
|---|---|
Use Scenario: Generating stable 100 ms delay for microcontroller wake-up sequencing in energy-harvesting sensor nodes. IC Role / Device Role / Timing Role: Monostable one-shot controller triggered by interrupt signal to hold MCU in reset until power stabilizes. Use Value: 20 pA input leakage ensures minimal loading on high-impedance RC network, preserving timing accuracy over temperature and battery voltage drift. |
Use Scenario: Creating variable-frequency square wave for driving piezoelectric transducers in ultrasonic cleaning equipment. IC Role / Device Role / Timing Role: Astable oscillator with adjustable RA/RB ratio controlling output frequency between 40 kHz–100 kHz. Use Value: 500 kHz max frequency and ±1.0% stability enable precise resonance tracking without external PLL or crystal reference. |
| Time Delay Generation | Missing Pulse Detector |
Use Scenario: Implementing 5 s safety interlock delay before enabling motor drive in industrial PLC I/O modules. IC Role / Device Role / Timing Role: Monostable timer triggered by safety relay closure, holding enable signal active for fixed duration. Use Value: Guaranteed −40 °C to +85 °C operation ensures reliable delay timing in uncontrolled cabinet environments. |
Use Scenario: Monitoring encoder pulses in CNC motion controllers to detect stalled axis conditions. IC Role / Device Role / Timing Role: One-shot retriggerable monostable configured to reset on each valid pulse; timeout indicates missing pulse. Use Value: Ultra-low 20 pA input current prevents false triggering from leakage in long cable runs or noisy industrial settings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar timer IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC555CDR | TI CMOS 555 with 100 µA supply current, 50 pA input leakage, and 2 MHz max frequency; SO8 package, same pinout | Better high-frequency performance but higher supply current; less suitable for ultra-low-power battery operation | Select TLC555CDR when >500 kHz operation or tighter VDD rejection (0.05 %/V) is required |
| NE555D | Bipolar 555 with 10 mA supply current, 500 nA input leakage, 100 kHz max frequency; SO8 package, identical pinout | Higher power consumption, requires VCONT and supply decoupling, limited temperature range (0 °C to +70 °C) | Select NE555D only for cost-sensitive, non-automotive applications where legacy design reuse outweighs power/accuracy trade-offs |
Compared with TLC555CDR and NE555D, the ICM7555ID,623 delivers the lowest power (80 µA), highest input impedance (20 pA), and widest temperature range (−40 °C to +85 °C), making it optimal for automotive, industrial, and battery-constrained timing where precision and reliability are prioritized over raw speed or lowest unit cost.
Availability
ICM7555ID,623 is available at Aetrix Electronics and suitable for precision timing, pulse generation, and time delay applications requiring stable component supply across automotive, industrial control, and sensor interface designs.
Supply support for ICM7555ID,623 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 markets.
The ICM7555ID,623 belongs to NXP's general-purpose analog timer product line, designed specifically to replace legacy bipolar 555 timers with CMOS efficiency, extended temperature capability, and improved noise immunity for mission-critical timing in harsh environments.
FAQ
What is the maximum supply voltage rating for the ICM7555ID,623?
The ICM7555ID,623 has an absolute maximum supply voltage (VDD) of 18 V per its limiting values table. Continuous operation is guaranteed from 3 V to 16 V across the full −40 °C to +85 °C temperature range. Exceeding 18 V risks latch-up due to the SCR structure inherent in its CMOS process, so robust overvoltage protection is recommended in 12 V automotive or industrial systems where transients may occur.
Does the ICM7555ID,623 require a decoupling capacitor on the CONTROL_VOLTAGE pin?
No, the ICM7555ID,623 does not require a decoupling capacitor on the CONTROL_VOLTAGE (pin 5) due to its ultra-high input impedance (>1012 Ω). Unlike the NE/SE555, its CMOS comparators draw only 20 pA typical input current, eliminating noise sensitivity that necessitated external capacitance in bipolar versions. This simplifies PCB layout and reduces BOM count in space-constrained designs.
Can the ICM7555ID,623 drive TTL logic directly?
Yes, the ICM7555ID,623 can drive TTL logic directly: at VDD ≥ 4.5 V, its output sink/source capability (≥3.2 mA at 5 V) meets standard TTL load requirements (2 × 16 mA inputs). Its rail-to-rail output swing ensures compatible HIGH/LOW voltage levels across the full 3–16 V supply range, eliminating need for level-shifting buffers in mixed-logic systems.
What is the minimum pulse width the ICM7555ID,623 can reliably trigger on?
The ICM7555ID,623 reliably triggers on pulses as narrow as 100 ns at VDD = 5 V and 25 °C, per Figure 8 in the datasheet. At lower supply voltages (e.g., 3 V), minimum pulse width increases to ~500 ns. This fast response enables use in high-speed event detection, such as missing-pulse monitoring in encoder signals or digital communication glitch detection.
How does the ICM7555ID,623 differ from the ICM7555CD variant?
The ICM7555ID,623 differs from the ICM7555CD solely in temperature grade and ordering suffix: ICM7555ID,623 is rated for −40 °C to +85 °C and packaged in SO8 (SOT96-1), while ICM7555CD is commercial grade (0 °C to +70 °C) in the same SO8 package. Electrical specifications, pinout, and functionality are identical - only the extended temperature qualification and tape-and-reel packaging (623) distinguish them.
ICM7555ID,623 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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,623 FAQ
1.How can I place an order for ICM7555ID,623 through Aetrix?
Please submit a Request for Quotation (RFQ) for ICM7555ID,623 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,623 reliable?
The price and inventory of ICM7555ID,623 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICM7555ID,623 is usually 5 days.
3.What payment methods are accepted for ICM7555ID,623?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICM7555ID,623 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICM7555ID,623?
ICM7555ID,623 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICM7555ID,623 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,623?
For technical support, including ICM7555ID,623 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICM7555ID,623 requirements.
6.How does Aetrix verify that ICM7555ID,623 is sourced from the original manufacturer or authorized distributors?
All ICM7555ID,623 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,623 meets industry standards.
7.What is the process for return or replacement of ICM7555ID,623?
All ICM7555ID,623 units undergo pre-shipment inspection (PSI). If there is an issue with ICM7555ID,623, 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,623 part is unused and in its original packaging.
Return procedure for ICM7555ID,623:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ICM7555ID,623 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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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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