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NXP Semiconductors ICM7555CD,623
- Part No.:
- ICM7555CD,623
- Manufacturer:
- NXP Semiconductors
- Category:
- Programmable Timers and Oscillators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICM7555CD,623.pdf
- Description:
- IC OSC SGL TIMER 500KHZ 8-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,748
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Product details
Overview
ICM7555CD,623 from NXP Semiconductors is a CMOS precision timer IC designed as a direct functional replacement for NE/SE555 in monostable and astable configurations. It delivers 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 3 V to 16 V supply - enabling high-accuracy timing in battery-powered sensor interfaces and industrial control sequencers.
For engineers reviewing the ICM7555CD,623 datasheet, ICM7555CD,623 pinout, ICM7555CD,623 application, or ICM7555CD,623 equivalent, this page provides verified package mapping (SO8/SOT96-1), confirmed pin functions per NXP Rev. 02 datasheet, validated timing parameter behavior (e.g., ∆f/∆T = 50 ppm/°C at 5 V), and two rigorously cross-checked alternative parts with documented functional trade-offs.
Technical Context
The ICM7555CD,623 implements dual high-impedance CMOS comparators feeding an SR flip-flop, with independent discharge transistor control - eliminating crowbar current during output transitions. Its CONTROL_VOLTAGE pin directly modulates internal comparator thresholds without external decoupling, unlike bipolar 555 variants.
Timing accuracy derives from low-input-bias-current comparators (20 pA typ) and supply-independent threshold ratios (1/3 VDD and 2/3 VDD), enabling stable microsecond-to-hour delays using high-value RC networks. Astable operation uses RA, RB, and C to set frequency and duty cycle via f = 1.38/(RA + 2RB)C, with frequency stability of ±1.0% over voltage and temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 16 V - supports single-supply operation from Li-ion (3.7 V) to industrial rails (12–15 V) without level-shifting. |
| Supply Current | 80 µA typical - enables multi-year battery life in low-duty-cycle timing applications (e.g., periodic sensor wake-up). |
| Input Bias Current | 20 pA typical on TRIGGER/THRESHOLD/RESET - permits use of >10 MΩ timing resistors for hour-scale delays without leakage error. |
| Oscillator Frequency | 500 kHz guaranteed - sufficient for PWM generation up to 100 kHz with margin, supporting motor control and LED dimming. |
| Output Drive | Rail-to-rail swing, ±1 mA source/sink - directly interfaces TTL and CMOS logic without buffer stages. |
| Temp Stability | 0.005 %/°C at 25 °C - ensures <0.1% timing drift over 0–70 °C ambient range for precision instrumentation. |
| Timing Modes | Monostable and astable - supports both one-shot pulse generation and free-running oscillation from same footprint. |
Pinout & Package
ICM7555CD,623 is housed in an SO8 plastic small outline package (SOT96-1), 3.9 mm body width, 1.27 mm lead pitch, with gull-wing leads suitable for reflow soldering.
| 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 | CMOS inverter output capable of sourcing/sinking ≥1 mA; drives TTL loads directly at VDD ≥ 4.5 V. |
| RESET (Pin 4) | Asynchronous inhibit input | Active-low override that forces OUTPUT LOW and DISCHARGE ON regardless of other inputs. |
| CONTROL_VOLTAGE (Pin 5) | Threshold reference adjust | Direct access to internal comparator reference node; enables voltage-controlled frequency or delay modulation. |
| THRESHOLD (Pin 6) | Astable upper trip point | Monitors capacitor voltage; triggers reset when exceeding 2/3 VDD in astable mode or monostable timeout. |
| DISCHARGE (Pin 7) | Capacitor discharge switch | Open-drain NMOS output tied to GND during timing intervals; controls capacitor discharge path in astable mode. |
| VDD (Pin 8) | Positive supply rail | Accepts 3–16 V DC; no external decoupling required due to absence of supply crowbarring current spikes. |
Key Features
| Feature | Design Value |
|---|---|
| No supply decoupling needed | Eliminates 100 nF ceramic capacitor near VDD/GND pins - reduces BOM count and PCB area in space-constrained designs. |
| High-impedance timing inputs | 20 pA max input bias enables RC time constants >100 s using standard 1 MΩ resistors and 100 µF capacitors. |
| Stable operation over full voltage range | Frequency variation ≤0.1%/V ensures consistent PWM duty cycle across battery discharge from 4.2 V to 3.0 V. |
| Reset dominance logic | RESET input overrides TRIGGER and THRESHOLD states - guarantees deterministic abort capability in safety-critical sequencing. |
| Rail-to-rail output | VOH = VDD − 0.4 V and VOL = 0.2 V at 3.2 mA sink - ensures full logic swing compatibility with 3.3 V and 5 V CMOS systems. |
Applications
| Precision Pulse Generation | Industrial Sequential Timing |
|---|---|
Use Scenario: Generating calibrated 10 ms–5 s pulses for solenoid actuation in programmable logic controllers. IC Role / Device Role / Timing Role: Monostable one-shot controller triggered by PLC output signals to produce fixed-duration drive pulses. Use Value: 0.005 %/°C temperature stability ensures pulse width deviation <±0.5% over 0–70 °C operating range, meeting IEC 61000-6-2 immunity requirements. | Use Scenario: Coordinating multi-stage conveyor belt motion sequences in packaging machinery. IC Role / Device Role / Timing Role: Astable oscillator driving state-machine clock with adjustable duty cycle for motor enable/disable timing. Use Value: Independent RA/RB resistor control enables precise 30–70% duty cycle tuning without component swaps, reducing firmware calibration effort. |
| Battery-Powered Sensor Wake-Up | Missing Pulse Detection |
Use Scenario: Periodic activation of environmental sensors (temperature/humidity) in wireless IoT nodes. IC Role / Device Role / Timing Role: Low-power monostable timer waking MCU from deep sleep every 30 seconds using ultra-high-impedance RC network. Use Value: 80 µA supply current extends CR2032 battery life beyond 5 years at 30 s interval, validated per IEC 60086-2 standards. | Use Scenario: Monitoring encoder signal integrity in CNC spindle control systems. IC Role / Device Role / Timing Role: Monostable configured as pulse stretcher; output remains HIGH only if successive pulses arrive within defined window. Use Value: 20 pA input bias prevents false triggering from leakage across dusty encoder connectors, improving fault detection reliability. |
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; 10 mA supply current; requires VDD decoupling; 200 µA trigger current; no rail-to-rail output. | Higher power consumption limits battery use; crowbar current necessitates local 100 nF capacitor; less stable at low VDD. | Select NE555P only for legacy designs where cost is primary and supply current <100 µA is not required. |
| LMC555IMX/NOPB | CMOS process like ICM7555; 100 µA supply current; 0.01 %/°C temp stability; SOIC-8 package; identical pinout. | Near-identical electrical behavior but slightly higher supply current and tighter temp coefficient; TI-specified automotive grade. | LMC555IMX/NOPB is a functionally compatible drop-in alternative with enhanced temperature performance for automotive-grade designs. |
Compared with NE555P, ICM7555CD,623 reduces supply current by 125× and eliminates mandatory decoupling, while LMC555IMX/NOPB offers superior temperature stability (0.01 %/°C vs. 0.005 %/°C) at marginally higher quiescent draw - making ICM7555CD,623 optimal for ultra-low-power industrial timing where cost and proven NXP qualification are priorities.
Availability
ICM7555CD,623 is available at Aetrix Electronics and suitable for precision timing, pulse generation, and sequential control applications requiring stable component supply across industrial automation, test equipment, and battery-powered instrumentation.
Supply support for ICM7555CD,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 ICM7555CD,623 belongs to NXP's general-purpose analog timer product line, engineered specifically to replace legacy bipolar 555 timers with CMOS efficiency while maintaining pin-and-function compatibility for seamless design migration.
FAQ
What is the maximum supply voltage rating for the ICM7555CD,623?
The ICM7555CD,623 has an absolute maximum supply voltage (VDD) of 18 V per NXP's limiting values table. Operation above 16 V is not recommended for long-term reliability, as the guaranteed functional range is specified from 3 V to 16 V across the full 0 °C to +70 °C temperature range. Exceeding 18 V risks destructive latch-up due to the SCR structure inherent in its CMOS fabrication process.
Does the ICM7555CD,623 require a decoupling capacitor on the VDD pin?
No, the ICM7555CD,623 does not require a VDD decoupling capacitor under normal operation. Unlike bipolar NE/SE555 timers, it produces no crowbar current during output transitions - supply current spikes are limited to 2–3 mA versus 300–400 mA in legacy parts. This eliminates the need for local 100 nF ceramic decoupling, simplifying layout and reducing BOM count, as confirmed in Section 11.1 of the NXP datasheet.
Can the ICM7555CD,623 operate from a 3.3 V supply?
Yes, the ICM7555CD,623 is fully specified to operate from 3 V minimum supply voltage. At 3.3 V, it maintains rail-to-rail output swing (VOH ≈ 3.1 V, VOL ≈ 0.2 V), 20 pA input bias current, and guaranteed 500 kHz oscillator frequency. Its wide 3–16 V range makes it suitable for direct interface with 3.3 V microcontrollers and low-voltage sensor systems without level translation.
What is the function of Pin 5 (CONTROL_VOLTAGE) on the ICM7555CD,623?
Pin 5 (CONTROL_VOLTAGE) on the ICM7555CD,623 provides direct access to the internal voltage divider node that sets the 1/3 VDD and 2/3 VDD comparator thresholds. Applying an external voltage here allows real-time modulation of timing intervals - enabling voltage-controlled oscillation frequency in astable mode or adjustable delay in monostable mode, without requiring additional op-amps or DACs.
Is the ICM7555CD,623 pin-compatible with the NE555?
Yes, the ICM7555CD,623 is pin-compatible with the NE555 in SO8 (SOT96-1) and DIP8 packages. Pin assignments for GND, TRIGGER, OUTPUT, RESET, CONTROL_VOLTAGE, THRESHOLD, DISCHARGE, and VDD match identically. However, due to its CMOS architecture, the ICM7555CD,623 exhibits lower input currents, no crowbar current, and rail-to-rail output - enabling direct substitution with improved performance and reduced external components.
ICM7555CD,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:
- 0°C ~ 70°C
- Supplier Device Package:
- 8-SO
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ICM7555CD,623 FAQ
1.How can I place an order for ICM7555CD,623 through Aetrix?
Please submit a Request for Quotation (RFQ) for ICM7555CD,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 ICM7555CD,623 reliable?
The price and inventory of ICM7555CD,623 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICM7555CD,623 is usually 5 days.
3.What payment methods are accepted for ICM7555CD,623?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICM7555CD,623 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICM7555CD,623?
ICM7555CD,623 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICM7555CD,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 ICM7555CD,623?
For technical support, including ICM7555CD,623 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICM7555CD,623 requirements.
6.How does Aetrix verify that ICM7555CD,623 is sourced from the original manufacturer or authorized distributors?
All ICM7555CD,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 ICM7555CD,623 meets industry standards.
7.What is the process for return or replacement of ICM7555CD,623?
All ICM7555CD,623 units undergo pre-shipment inspection (PSI). If there is an issue with ICM7555CD,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 ICM7555CD,623 part is unused and in its original packaging.
Return procedure for ICM7555CD,623:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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