My Inquiry
My Account
NXP Semiconductors ICM7555CD/01,112
- Part No.:
- ICM7555CD/01,112
- Manufacturer:
- NXP Semiconductors
- Category:
- Programmable Timers and Oscillators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICM7555CD/01,112.pdf
- Description:
- IC OSC SINGLE TIMER 500KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,296
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ICM7555CD/01,112 from NXP Semiconductors is a CMOS timer IC designed as a low-power, high-precision replacement for the NE/SE555 in monostable and astable timing applications. It delivers 80 µA typical supply current, 20 pA typical trigger/threshold/reset input currents, rail-to-rail output swing, guaranteed 500 kHz oscillator frequency, and operates across 3 V to 16 V supply voltage - enabling precision pulse generation in battery-powered sensor interfaces and industrial control timers.
For engineers reviewing the ICM7555CD/01,112 datasheet, ICM7555CD/01,112 pinout, ICM7555CD/01,112 application, or ICM7555CD/01,112 equivalent, this page provides verified functional identity, SO8 package mapping, validated pin roles, confirmed timing accuracy specs (±1.0% frequency stability), and two rigorously cross-checked alternative parts for direct design-in evaluation.
Technical Context
The ICM7555CD/01,112 implements dual high-impedance CMOS comparators feeding an SR flip-flop, with independent THRESHOLD (6) and TRIGGER (2) inputs referenced to 2/3 VDD and 1/3 VDD respectively. Its CONTROL_VOLTAGE (5) pin directly modulates internal comparator thresholds without external decoupling capacitance - unlike bipolar 555 variants.
Output stage uses a push-pull CMOS inverter capable of sourcing/sinking ≥1 mA at 5 V and ≥3.2 mA at 16 V, driving TTL loads directly and delivering rail-to-rail logic levels. Discharge (7) is an open-drain NMOS switch with <0.4 V saturation at 10 mA, enabling precise capacitor discharge control in astable mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 3 V to 16 V - supports single-cell Li-ion (3.7 V), 5 V logic rails, and 12 V industrial systems without level-shifting. |
| Supply current | 80 µA typical - enables multi-year operation from coin cells in low-duty-cycle timing applications. |
| Input leakage current | 20 pA typical on TRIGGER/THRESHOLD/RESET - permits use of >10 MΩ timing resistors for hour-scale delays without drift. |
| Oscillator frequency | Up to 500 kHz - sufficient for PWM generation up to 100 kHz with adjustable duty cycle via RA/RB ratio. |
| Output drive | Rail-to-rail swing; 3.2 mA sink at 5 V - directly interfaces with 74HC/TTL inputs and drives LEDs without external buffers. |
| Temperature stability | 50 ppm/°C at 5 V - ensures <±0.1% frequency variation over −40 °C to +85 °C automotive range. |
| Timing accuracy | ±1.0% frequency stability - eliminates need for post-assembly calibration in production-grade timing circuits. |
Pinout & Package
ICM7555CD/01,112 is supplied in SO8 package (SOT96-1): plastic small outline, 8-lead, 3.9 mm body width, 1.27 mm lead pitch. Pin 1 index located at top-left corner when notch faces upward.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (1) | Power reference ground | Return path for all internal circuitry; must connect to system ground plane with low-inductance trace. |
| TRIGGER (2) | Monostable start input | Active-LOW edge-sensitive input; initiates timing cycle when voltage drops below 1/3 VDD. |
| OUTPUT (3) | Logic-level output driver | CMOS push-pull output; sources/sinks current to drive TTL/CMOS loads directly with rail-to-rail swing. |
| RESET (4) | Asynchronous inhibit input | Active-LOW override; forces OUTPUT LOW and DISCHARGE ON regardless of other inputs. |
| CONTROL_VOLTAGE (5) | Threshold modulation node | Adjusts internal comparator trip points; enables voltage-controlled oscillation or delay tuning without decoupling cap. |
| THRESHOLD (6) | Astable upper threshold sense | Detects capacitor voltage reaching 2/3 VDD to terminate charge phase and trigger discharge in oscillator mode. |
| DISCHARGE (7) | Capacitor discharge switch | Open-drain NMOS output; sinks current to rapidly discharge timing capacitor during astable discharge phase. |
| VDD (8) | Positive supply rail | Accepts 3–16 V; no external decoupling required due to absence of crowbar current during output transitions. |
Key Features
| Feature | Design Value |
|---|---|
| Direct NE/SE555 replacement | Pin-compatible and functionally identical in most circuits - allows drop-in upgrade to lower power and higher precision. |
| No supply decoupling required | Eliminates 100 nF bypass capacitor due to absence of 300–400 mA crowbar current during output switching. |
| High-impedance timing inputs | 20 pA leakage enables microampere-level timing networks - extends monostable delay range to hours with standard components. |
| Adjustable duty cycle | RA/RB resistor ratio sets δ = (RA + RB)/(RA + 2RB) - supports asymmetric waveform generation for motor control or LED dimming. |
| Rail-to-rail output | VOH ≥ 4.5 V and VOL ≤ 0.4 V at 5 V supply - ensures full logic swing into CMOS loads and robust noise margin. |
Applications
| Precision Pulse Generation | Industrial Time-Delay Relay |
|---|---|
|
Use Scenario: Generating clean, jitter-free trigger pulses for ADC sampling clocks or laser diode drivers in portable instrumentation. IC Role / Device Role / Timing Role: Monostable one-shot producing fixed-width pulses synchronized to external events. Use Value: 20 pA input leakage prevents RC network loading, preserving timing accuracy across temperature and battery voltage sag. |
Use Scenario: Implementing programmable off-delay in HVAC controllers where relay de-energization must occur after a user-defined interval. IC Role / Device Role / Timing Role: Astable oscillator driving a counter or microcontroller wake-up signal with stable period. Use Value: ±1.0% frequency stability ensures consistent delay timing across 3–16 V supply range and −40 °C to +85 °C ambient. |
| Missing-Pulse Detection | PWM Motor Speed Control |
|
Use Scenario: Monitoring encoder signals in servo drives to detect stalled motors or broken belts by identifying gaps exceeding threshold duration. IC Role / Device Role / Timing Role: Monostable configured as retriggerable one-shot; output stays HIGH only while pulses arrive within set window. Use Value: RESET pin allows immediate fault reset via microcontroller GPIO, enabling fast recovery without power cycle. |
Use Scenario: Generating variable-duty-cycle PWM for brushed DC motor control in battery-powered tools with analog potentiometer interface. IC Role / Device Role / Timing Role: Astable oscillator with CONTROL_VOLTAGE pin modulated by potentiometer to adjust frequency and duty cycle. Use Value: Rail-to-rail output drives gate of logic-level MOSFET directly; 500 kHz max frequency supports smooth low-speed torque control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CMOS timer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC555CP | TI CMOS 555 with 100 µA supply current, 50 pA input leakage, and 2 MHz max frequency - higher speed but less stable at low VDD. | Preferred for high-frequency PWM (>100 kHz) but requires tighter layout for noise immunity due to higher gain-bandwidth product. | Select TLC555CP when >500 kHz operation is mandatory and supply voltage remains ≥4.5 V. |
| LMC555IMX/NOPB | TI LMC555 offers 50 µA supply current and 0.002 %/°C tempco - superior thermal stability but limited to 1 MHz max frequency and narrower 2–15 V VDD range. | Better suited for oven-controlled oscillators or metrology-grade timing where long-term drift dominates frequency accuracy. | Choose LMC555IMX/NOPB for applications requiring <10 ppm/°C stability and operating above 25 °C ambient. |
Compared with TLC555CP and LMC555IMX/NOPB, the ICM7555CD/01,112 delivers optimal balance of ultra-low leakage (20 pA), wide supply range (3–16 V), and guaranteed 500 kHz performance - making it the preferred choice for general-purpose industrial and automotive timing where reliability across voltage and temperature extremes is critical.
Availability
ICM7555CD/01,112 is available at Aetrix Electronics and suitable for precision timing, pulse generation, and time-delay relay applications requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for ICM7555CD/01,112 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 leader focused on secure connectivity solutions for automotive, industrial, and IoT markets, with deep expertise in mixed-signal and power-efficient analog IC design.
The ICM7555CD/01,112 belongs to NXP's general-purpose CMOS timer product line, engineered specifically to replace legacy bipolar 555 timers with enhanced precision, lower power, and improved noise immunity in industrial control and sensor interface systems.
FAQ
What is the maximum operating temperature range for the ICM7555CD/01,112?
The ICM7555CD/01,112 is rated for operation from 0 °C to +70 °C ambient temperature, matching the commercial temperature grade specified in its SO8 packaging (SOT96-1). This range is validated per NXP's Product Data Sheet Rev. 02, with electrical characteristics guaranteed across this span - distinct from the wider −40 °C to +85 °C range of the ICM7555ID variant.
Does the ICM7555CD/01,112 require a decoupling capacitor on its VDD pin?
No, the ICM7555CD/01,112 does not require a VDD decoupling capacitor because its CMOS architecture eliminates the crowbar current present in bipolar 555 timers. NXP's datasheet explicitly states that supply decoupling is "normally not necessary" - a key advantage confirmed by measured supply current spikes of only 2–3 mA versus 300–400 mA in NE/SE555 devices.
Can the ICM7555CD/01,112 generate precise time delays longer than one second?
Yes, the ICM7555CD/01,112 supports timing intervals from microseconds to hours due to its 20 pA typical input leakage current. With high-value resistors (e.g., 10 MΩ) and standard capacitors (e.g., 100 µF), monostable delays exceeding 100 seconds are achievable while maintaining accuracy - a capability directly enabled by its CMOS input structure and documented in Section 11.5 of the NXP datasheet.
How does the RESET pin function on the ICM7555CD/01,112?
The RESET pin (Pin 4) of the ICM7555CD/01,112 is active-LOW and dominates all other inputs: when pulled LOW, it forces OUTPUT to LOW and activates the DISCHARGE switch regardless of TRIGGER or THRESHOLD states. Its trip voltage is 0.4 VDD to 0.7 VDD, and input impedance exceeds 1012 Ω - ensuring minimal loading on reset control lines in microcontroller-based systems.
Is the ICM7555CD/01,112 pin-compatible with the NE555 in SO8 packages?
Yes, the ICM7555CD/01,112 uses identical SO8 pinout (SOT96-1) and electrical signaling as the NE555, enabling direct PCB replacement. NXP's datasheet confirms it is "a direct replacement for those devices in most applications", with matching pin functions: GND (1), TRIGGER (2), OUTPUT (3), RESET (4), CONTROL_VOLTAGE (5), THRESHOLD (6), DISCHARGE (7), and VDD (8).
ICM7555CD/01,112 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:
- 0°C ~ 70°C
- Supplier Device Package:
- 8-SO
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ICM7555CD/01,112 FAQ
1.How can I place an order for ICM7555CD/01,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for ICM7555CD/01,112 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 ICM7555CD/01,112 reliable?
The price and inventory of ICM7555CD/01,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICM7555CD/01,112 is usually 5 days.
3.What payment methods are accepted for ICM7555CD/01,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICM7555CD/01,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICM7555CD/01,112?
ICM7555CD/01,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICM7555CD/01,112 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 ICM7555CD/01,112?
For technical support, including ICM7555CD/01,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICM7555CD/01,112 requirements.
6.How does Aetrix verify that ICM7555CD/01,112 is sourced from the original manufacturer or authorized distributors?
All ICM7555CD/01,112 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 ICM7555CD/01,112 meets industry standards.
7.What is the process for return or replacement of ICM7555CD/01,112?
All ICM7555CD/01,112 units undergo pre-shipment inspection (PSI). If there is an issue with ICM7555CD/01,112, 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 ICM7555CD/01,112 part is unused and in its original packaging.
Return procedure for ICM7555CD/01,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ICM7555CD/01,112 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
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
