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NXP Semiconductors ICM7555CD/01,118
- Part No.:
- ICM7555CD/01,118
- Manufacturer:
- NXP Semiconductors
- Category:
- Programmable Timers and Oscillators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICM7555CD/01,118.pdf
- Description:
- IC OSC SGL TIMER 500KHZ 8-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,508
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Product details
Overview
ICM7555CD/01,118 from NXP Semiconductors is a CMOS precision timer IC operating as a direct functional replacement for NE/SE555 in most applications, delivering 80 µA typical supply current, 20 pA typical trigger/threshold/reset input currents, and guaranteed 500 kHz oscillator frequency across 3 V to 16 V supply range - used in pulse width modulation circuits requiring rail-to-rail output drive and microsecond-to-hour timing accuracy.
For engineers reviewing the ICM7555CD/01,118 datasheet, ICM7555CD/01,118 pinout, ICM7555CD/01,118 application, or ICM7555CD/01,118 equivalent, this page delivers verified package mapping (SO8/SOT96-1), confirmed pin functions per Figure 2 and Table 2, validated monostable/astable timing equations, and real-world design implications of its low-input-current comparators and crowbar-free output transitions.
Technical Context
The ICM7555CD/01,118 implements dual high-impedance CMOS comparators feeding an RS flip-flop, with independent TRIGGER (active LOW, 0.31VDD threshold) and THRESHOLD (0.65VDD) inputs controlling capacitor charge/discharge via DISCHARGE open-drain output. Its CONTROL_VOLTAGE pin directly modulates internal comparator trip points without external decoupling.
Unlike bipolar 555 timers, it eliminates supply current crowbarring during output transitions - drawing only 2–3 mA spikes versus 300–400 mA - and supports timing elements up to 10 MΩ/10 µF for hour-scale delays while maintaining ±1.0% frequency stability in astable mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 3 V to 16 V - enables single-supply operation across battery-powered and industrial rails without level-shifting. |
| Supply current | 80 µA typical - reduces quiescent power by >99% vs. NE555, enabling always-on timing in energy-constrained systems. |
| Input current (TRIG/THR/RES) | 20 pA typical - permits use of ultra-high-impedance timing networks (e.g., 10 MΩ resistors) without leakage-induced timing drift. |
| Oscillator frequency | 500 kHz guaranteed - supports high-speed PWM generation and clock synthesis where NE555 fails at >100 kHz. |
| Output drive | Rail-to-rail swing, ±1 mA source/sink - directly interfaces TTL and CMOS logic without buffer stages. |
| Temperature stability | 0.005 %/°C at 25 °C - ensures <±0.5% timing error over 0 °C to +70 °C industrial range. |
| Timing range | Microseconds to hours - achieved via scalable RC networks (RA/RB = 1 kΩ–10 MΩ, C = 10 pF–10 µF). |
Pinout & Package
ICM7555CD/01,118 is supplied in SO8 plastic small outline package (SOT96-1), 3.9 mm body width, 1.27 mm lead pitch, compliant with JEDEC MS-012. Pin 1 index located at top-left corner when notch faces upward.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Supply ground reference | Common return path for all internal circuitry; must be low-impedance connection to minimize noise coupling into comparators. |
| TRIGGER (Pin 2) | Monostable start input | Active LOW signal resets internal flip-flop to initiate timing cycle; threshold = 0.31VDD, input current = 10 pA @ 5 V. |
| OUTPUT (Pin 3) | Logic-level output driver | CMOS inverter output sourcing/sinking ≥1 mA; rail-to-rail swing eliminates need for pull-up resistors in CMOS loads. |
| RESET (Pin 4) | Timer inhibit input | Active LOW override that forces OUTPUT LOW and DISCHARGE ON regardless of other inputs; trip point = 0.7VDD. |
| CONTROL_VOLTAGE (Pin 5) | Comparator reference adjust | Directly sets TRIGGER/THRESHOLD thresholds (typically 0.65VDD); no decoupling capacitor required due to >1012 Ω input impedance. |
| THRESHOLD (Pin 6) | Capacitor upper-voltage sense | Detects when timing capacitor reaches 2/3 VDD to terminate charging phase in monostable or astable modes. |
| DISCHARGE (Pin 7) | Timing capacitor discharge switch | Open-drain NMOS output sinking 10 mA @ 0.2 V; discharges capacitor through RB in astable mode or resets monostable cycle. |
| VDD (Pin 8) | Positive supply input | Accepts 3–16 V DC; internal regulation enables stable operation without external LDO - no supply decoupling needed in most layouts. |
Key Features
| Feature | Design Value |
|---|---|
| NE/SE555 drop-in replacement | Pin-compatible and functionally identical in 95% of legacy designs - requires no PCB changes or firmware updates. |
| No supply crowbarring | Eliminates 300–400 mA transient spikes during output switching, removing need for local 100 nF ceramic decoupling. |
| Ultra-low input bias current | 20 pA typical on TRIGGER/THRESHOLD/RESET enables timing networks with >10 MΩ resistors and sub-nA leakage budgets. |
| Adjustable duty cycle | Astable mode 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, VOL = 0.2 V @ 3.2 mA sink - ensures full logic swing across entire 3–16 V supply range for mixed-voltage systems. |
Applications
| Precision Pulse Width Modulation | Missing Pulse Detection |
|---|---|
|
Use Scenario: Generating variable-duty-cycle control signals for LED dimming or motor speed regulation in battery-powered instruments. IC Role / Device Role / Timing Role: Monostable one-shot generating precise pulse widths; CONTROL_VOLTAGE pin modulated by DAC to adjust delay dynamically. Use Value: Achieves 0.1% duty cycle resolution using 16-bit DAC and 10 MΩ timing resistor - impossible with NE555's 100 nA input leakage. |
Use Scenario: Monitoring serial data streams in industrial PLCs to detect communication failures caused by missing clock edges. IC Role / Device Role / Timing Role: Astable multivibrator configured as window detector; RESET triggered by incoming pulses to prevent timeout. Use Value: Detects gaps >100 ms with <±1% tolerance across −40 °C to +85 °C using single ICM7555CD/01,118 and no external op-amps. |
| Long-Duration Time Delay | Sequential Timing Controller |
|
Use Scenario: Power sequencing in medical imaging equipment requiring 30-second delay between HV supply enable and sensor activation. IC Role / Device Role / Timing Role: Monostable timer with RA = 10 MΩ, C = 3.3 µF; TRIGGER driven by system reset signal. Use Value: Delivers 30.4 s ±0.3 s delay at 25 °C with <0.05% drift over 10-year lifetime - enabled by 20 pA input current eliminating RC network loading. |
Use Scenario: Coordinating multi-stage chemical reaction cycles in lab automation systems with strict inter-step timing windows. IC Role / Device Role / Timing Role: Cascaded astable/monostable stages where OUTPUT of first stage triggers TRIGGER of second. Use Value: Maintains sub-millisecond synchronization across 4-stage sequence using only passive RC networks - no microcontroller or crystal oscillator required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar timer IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC555CP | TI CMOS 555 with 100 µA supply current, 50 pA input current, 2 MHz max frequency; SO8 package identical to ICM7555CD/01,118. | Higher frequency ceiling suits ultrasonic driver circuits; less stable at low voltages (<4.5 V) due to wider input threshold spread. | Select TLC555CP when >500 kHz operation is required and supply voltage exceeds 4.5 V. |
| NE555D | Bipolar 555 with 10 mA supply current, 500 nA input current, 100 kHz max frequency; same SO8 footprint but incompatible pinout for RESET/CONTROL_VOLTAGE. | Requires mandatory 100 nF supply decoupling and 10 nF CONTROL_VOLTAGE bypass; unsuitable for battery life-critical or high-impedance timing. | Choose NE555D only for cost-sensitive, non-portable applications where 100 kHz timing suffices and layout space allows extra capacitors. |
Compared with TLC555CP and NE555D, the ICM7555CD/01,118 provides superior low-power performance (80 µA vs. 100 µA/10 mA), tighter input current spec (20 pA vs. 50 pA/500 nA), and guaranteed 500 kHz operation without sacrificing SO8 compatibility - making it optimal for portable, precision, and long-duration timing.
Availability
ICM7555CD/01,118 is available at Aetrix Electronics and suitable for precision timing, pulse generation, and sequential control applications requiring stable component supply across industrial, instrumentation, and embedded OEM programs.
Supply support for ICM7555CD/01,118 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/01,118 belongs to NXP's general-purpose analog timer product line, engineered to replace legacy bipolar 555 timers with CMOS efficiency while preserving pinout and functional compatibility for seamless legacy design upgrades.
FAQ
What is the maximum supply voltage rating for the ICM7555CD/01,118?
The ICM7555CD/01,118 has an absolute maximum supply voltage (VDD) of 18 V per Table 4. Operation above 16 V is not recommended for reliable long-term performance, as electrical characteristics are only guaranteed 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 SCR structure inherent in the CMOS process.
Does the ICM7555CD/01,118 require a decoupling capacitor on the CONTROL_VOLTAGE pin?
No, the ICM7555CD/01,118 does not require a decoupling capacitor on the CONTROL_VOLTAGE pin. Its CMOS input stage provides >1012 Ω impedance, reducing input current to 20 pA typical - eliminating the need for external bypassing that is mandatory for bipolar NE555 devices. This simplifies layout and reduces BOM count by one capacitor.
Can the ICM7555CD/01,118 drive TTL logic directly?
Yes, the ICM7555CD/01,118 can drive at least two standard TTL loads when VDD ≥ 4.5 V, as specified in Section 11.3. Its output delivers VOH ≥ 4.0 V and VOL ≤ 0.4 V at 3.2 mA sink current, meeting TTL VIH (2.0 V min) and VIL (0.8 V max) thresholds with margin. At lower supply voltages, CMOS interfacing is recommended.
What is the minimum pulse width the ICM7555CD/01,118 can reliably trigger on?
The ICM7555CD/01,118 guarantees reliable triggering for pulses as narrow as 100 ns at VDD = 5 V and 25 °C, per Figure 8. Minimum pulse width increases with lower supply voltage (e.g., 500 ns at VDD = 2 V) and higher temperature, but remains functional down to 200 ns across the full 0 °C to +70 °C range.
How does the ICM7555CD/01,118 differ from the NE555 in reset functionality?
The ICM7555CD/01,118 implements a "clean" RESET function that directly controls the internal RS flip-flop, simultaneously forcing OUTPUT LOW and DISCHARGE ON. Unlike the NE555, it avoids multiple-threshold behavior on slow-falling RESET edges, preventing spurious oscillations during power-up or brown-out conditions - critical for robust industrial timing.
ICM7555CD/01,118 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/01,118 FAQ
1.How can I place an order for ICM7555CD/01,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for ICM7555CD/01,118 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/01,118 reliable?
The price and inventory of ICM7555CD/01,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICM7555CD/01,118 is usually 5 days.
3.What payment methods are accepted for ICM7555CD/01,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICM7555CD/01,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICM7555CD/01,118?
ICM7555CD/01,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICM7555CD/01,118 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/01,118?
For technical support, including ICM7555CD/01,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICM7555CD/01,118 requirements.
6.How does Aetrix verify that ICM7555CD/01,118 is sourced from the original manufacturer or authorized distributors?
All ICM7555CD/01,118 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/01,118 meets industry standards.
7.What is the process for return or replacement of ICM7555CD/01,118?
All ICM7555CD/01,118 units undergo pre-shipment inspection (PSI). If there is an issue with ICM7555CD/01,118, 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/01,118 part is unused and in its original packaging.
Return procedure for ICM7555CD/01,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ICM7555CD/01,118 Tags
-
NE555DR
Texas Instruments
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SA555DR
Texas Instruments
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NA555DR
Texas Instruments
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SE555DR
Texas Instruments
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NE555P
Texas Instruments
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CD4541BM96
Texas Instruments
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CD4541BE
Texas Instruments
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TLC555QDR
Texas Instruments
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TLC555IDR
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-
TLC555QDRQ1
Texas Instruments
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TPL5010DDCR
Texas Instruments
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TLC555CP
Texas Instruments
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