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Renesas ICM7555CBAZ
- Part No.:
- ICM7555CBAZ
- Manufacturer:
- Renesas
- Category:
- Programmable Timers and Oscillators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICM7555CBAZ.pdf
- Description:
- IC OSC SINGLE TIMER 1MHZ 8-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:38,136
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Product details
Overview
ICM7555CBAZ from Renesas Electronics is a CMOS-based general-purpose timer IC, functionally equivalent to the classic NE555 but with significantly improved performance: 60 µA supply current at 5 V, 2 V to 18 V operating voltage range, 20 pA input currents, and 1 MHz maximum oscillator frequency. It operates in both monostable and astable modes for precision timing, pulse generation, and time-delay applications in industrial control and instrumentation circuits.
For engineers reviewing the ICM7555CBAZ datasheet, ICM7555CBAZ pinout, ICM7555CBAZ application, or ICM7555CBAZ equivalent, this page delivers verified electrical specifications, SOIC-8 package details, functional pin roles, real-world use scenarios, and two validated alternative parts - all grounded in the official FN2867 Rev.10.01 datasheet.
Technical Context
The ICM7555CBAZ implements a dual-comparator + SR flip-flop architecture with rail-to-rail CMOS output drivers. Its internal comparators feature ultra-low input bias current (20 pA), enabling high-impedance RC timing networks for delays from microseconds to hours without drift-induced errors.
Unlike bipolar 555 timers, it eliminates crowbar current during output transitions and removes the need for Control Voltage decoupling capacitors. Reset dominates all inputs, and triggering occurs on falling edges at Threshold (2/3 VDD) and Trigger (1/3 VDD) thresholds - matching legacy 555 behavior while improving noise immunity and stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 18.0 V - supports single-supply operation across battery-powered and industrial rails without level-shifting. |
| Supply Current (Typ) | 60 µA at 15 V - enables multi-year battery life in low-power timing circuits; no external decoupling required. |
| Input Bias Current | 20 pA - permits use of >10 MΩ timing resistors and sub-nF capacitors for long-duration, low-drift delays. |
| Max Oscillator Frequency | 1 MHz - sufficient for PWM generation, clock synthesis, and high-speed pulse train generation. |
| Timing Accuracy (Monostable) | ±2% at RA = 10 kΩ, C = 0.1 µF - ensures repeatable one-shot pulse widths without calibration. |
| Output Drive | Sinks 20 mA / Sources 0.8 mA - directly drives TTL loads or interfaces with CMOS logic without buffer stages. |
| Temperature Stability | 0.005%/°C at +25°C - maintains timing consistency over industrial temperature range (0°C to +70°C). |
Pinout & Package
ICM7555CBAZ is housed in an 8-lead narrow-body SOIC package (RoHS-compliant, JEDEC MS-012-AA, pkg drawing M8.15), measuring 4.90 mm × 3.90 mm × 1.75 mm with 1.27 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Ground (GND) | Reference node for all internal circuitry | Must be connected to system ground plane; no separate analog/digital split required. |
| 2 - Trigger | Active-low input initiating monostable output | Falling edge below 1/3 VDD sets internal flip-flop; 20 pA leakage allows direct RC coupling. |
| 3 - Output | CMOS push-pull output stage | Rail-to-rail swing (VDD to GND); drives TTL/CMOS loads; no external pull-up needed. |
| 4 - Reset | Asynchronous active-low reset input | Overrides Trigger/Threshold; trip point ~0.6–1.0 V independent of VDD; high-Z input. |
| 5 - Control Voltage | Adjusts internal comparator reference levels | Modifies Threshold (2/3 VDD) and Trigger (1/3 VDD) points; no decoupling capacitor required. |
| 6 - Threshold | Active-high input ending monostable period | Rising edge above 2/3 VDD resets flip-flop; used with Discharge to define RC time constant. |
| 7 - Discharge | Open-drain N-channel switch to GND | Internally shorts external timing capacitor during discharge phase; sinks ≥15 mA. |
| 8 - VDD | Positive power supply | Accepts 2–18 V; low quiescent current enables operation from coin cells or wide-input DC-DC outputs. |
Key Features
| Feature | Design Value |
|---|---|
| Direct SE/NE555 replacement | Pin-compatible and functionally identical in monostable/astable configurations; no PCB redesign needed. |
| No supply crowbarring | Eliminates 300–400 mA transient spikes during output switching - removes need for local 100 nF decoupling. |
| High-impedance timing inputs | 20 pA max input current enables RC networks with >100 MΩ resistors for hour-scale delays. |
| Rail-to-rail CMOS output | Full VDD-to-GND swing at all supply voltages - simplifies interfacing with mixed-voltage logic systems. |
| Wide temperature stability | 0.005%/°C drift at +25°C ensures <0.5% timing error over 0°C to +70°C operating range. |
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 triggered by interrupt signal; controls enable timing of peripheral power-up. Use Value: 60 µA quiescent current extends battery life; ±2% timing accuracy avoids firmware calibration. | Use Scenario: Creating adjustable 1–10 kHz square wave for ultrasonic transducer excitation in portable medical devices. IC Role / Device Role / Timing Role: Astable multivibrator with external RA/RB/C; provides clean, duty-cycle-tunable drive signal. Use Value: 1 MHz max frequency and rail-to-rail output ensure full-spectrum coverage; no external buffers required. |
| Time Delay Generation | Missing Pulse Detector |
Use Scenario: Implementing 5 s safety interlock delay before motor startup in industrial PLC I/O modules. IC Role / Device Role / Timing Role: Monostable timer triggered by safety relay closure; output enables contactor driver after fixed interval. Use Value: 2 V to 18 V operation matches PLC backplane voltage; Reset pin allows emergency abort without hardware modification. | Use Scenario: Monitoring encoder quadrature signals in CNC motion controllers to detect stalled axis conditions. IC Role / Device Role / Timing Role: Monostable configured as retriggerable one-shot; output stays high only when pulses arrive within set window. Use Value: 20 pA input current prevents false triggers from cable leakage; fast 75 ns rise/fall times capture short pulse gaps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar timer IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC555CP | Higher supply current (100 µA typ), wider temp range (−40°C to +85°C), same SOIC-8 pinout | Better suited for extended-temperature environments; less optimal for ultra-low-power battery designs | Select TLC555CP if operating outside 0°C–+70°C or requiring TI's qualification pedigree. |
| NE555P | Bipolar process; 3–6 mA supply current; requires VDD decoupling and CV pin capacitor; lower input impedance | Not suitable for high-Z RC networks or battery-critical systems; higher EMI susceptibility | Choose NE555P only for legacy board refresh where cost is primary and power/noise are secondary. |
Compared with TLC555CP and NE555P, the ICM7555CBAZ delivers superior power efficiency (60 µA vs. 100 µA/5 mA), eliminates mandatory decoupling components, and enables longer RC time constants - making it the preferred choice for modern low-power, space-constrained timing designs.
Availability
ICM7555CBAZ is available at Aetrix Electronics and suitable for precision timing, pulse generation, time delay generation, and missing pulse detection applications requiring stable component supply, RoHS compliance, and industrial-grade reliability.
Supply support for ICM7555CBAZ 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
Renesas Electronics is a global semiconductor leader delivering microcontrollers, analog, power, and timing solutions for automotive, industrial, and IoT applications.
The ICM7555CBAZ belongs to Renesas' legacy precision timer product line, designed specifically to replace bipolar 555 timers with CMOS efficiency, enhanced stability, and drop-in compatibility in industrial control, instrumentation, and power management systems.
FAQ
What is the operating temperature range for the ICM7555CBAZ?
The ICM7555CBAZ is rated for operation from 0°C to +70°C, as specified in the "Ordering Information" table of the FN2867 Rev.10.01 datasheet. This commercial-grade temperature range aligns with its ICM7555C suffix and suits indoor industrial equipment, test instruments, and consumer electronics where ambient conditions remain controlled. The device is not qualified for extended or automotive temperature ranges.
Does the ICM7555CBAZ require a decoupling capacitor on the Control Voltage (pin 5)?
No, the ICM7555CBAZ does not require a decoupling capacitor on the Control Voltage pin. Its CMOS input structure provides extremely high impedance (20 pA typical input current), eliminating the need for external capacitance to stabilize the internal comparator reference - unlike bipolar 555 timers. This reduces BOM count and PCB area, as confirmed in the Application Information section of the FN2867 datasheet.
Can the ICM7555CBAZ drive TTL logic directly?
Yes, the ICM7555CBAZ can drive at least two standard TTL loads when VDD is ≥4.5 V, as stated in the "OUTPUT DRIVE CAPABILITY" section of FN2867. Its CMOS output stage sources up to 0.8 mA and sinks up to 20 mA, providing sufficient current and rail-to-rail voltage swing (e.g., VOH ≥4.0 V at VDD = 5 V) to meet TTL input thresholds reliably without external buffers.
What is the maximum frequency achievable in astable mode using the ICM7555CBAZ?
The ICM7555CBAZ achieves a maximum oscillator frequency of 1 MHz under specified test conditions (VDD = 5 V, RA = 470 Ω, RB = 270 Ω, C = 200 pF), per the "Electrical Specifications" table on page 4 of FN2867 Rev.10.01. This limit reflects practical layout and parasitic constraints; stable operation above 500 kHz requires careful PCB routing and low-inductance timing components.
Is the ICM7555CBAZ pin-compatible with the NE555?
Yes, the ICM7555CBAZ is pin-compatible with the NE555 in the 8-lead SOIC (and PDIP) packages. Pin functions - GND, Trigger, Output, Reset, Control Voltage, Threshold, Discharge, and VDD - match identically, and electrical behavior (thresholds, reset trip point, output polarity) is preserved. This enables direct substitution in existing 555-based designs without layout changes, as emphasized throughout the FN2867 datasheet's "General Purpose Timers" introduction and Application Information sections.
ICM7555CBAZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- 555 Type, Timer/Oscillator (Single)
- Count:
- -
- Frequency:
- 1MHz
- Voltage - Supply:
- 2V ~ 18V
- Current - Supply:
- 60 µA
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 8-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ICM7555CBAZ FAQ
1.How can I place an order for ICM7555CBAZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ICM7555CBAZ 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 ICM7555CBAZ reliable?
The price and inventory of ICM7555CBAZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICM7555CBAZ is usually 5 days.
3.What payment methods are accepted for ICM7555CBAZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICM7555CBAZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICM7555CBAZ?
ICM7555CBAZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICM7555CBAZ 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 ICM7555CBAZ?
For technical support, including ICM7555CBAZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICM7555CBAZ requirements.
6.How does Aetrix verify that ICM7555CBAZ is sourced from the original manufacturer or authorized distributors?
All ICM7555CBAZ 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 ICM7555CBAZ meets industry standards.
7.What is the process for return or replacement of ICM7555CBAZ?
All ICM7555CBAZ units undergo pre-shipment inspection (PSI). If there is an issue with ICM7555CBAZ, 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 ICM7555CBAZ part is unused and in its original packaging.
Return procedure for ICM7555CBAZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ICM7555CBAZ Tags
-
NE555DR
Texas Instruments
-
SA555DR
Texas Instruments
-
NA555DR
Texas Instruments
-
SE555DR
Texas Instruments
-
NE555P
Texas Instruments
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CD4541BM96
Texas Instruments
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CD4541BE
Texas Instruments
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TLC555QDR
Texas Instruments
-
TLC555IDR
Texas Instruments
-
TLC555QDRQ1
Texas Instruments
-
TPL5010DDCR
Texas Instruments
-
TLC555CP
Texas Instruments
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