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Renesas ICM7555IBAZ
- Part No.:
- ICM7555IBAZ
- Manufacturer:
- Renesas
- Category:
- Programmable Timers and Oscillators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICM7555IBAZ.pdf
- Description:
- IC OSC SINGLE TIMER 1MHZ 8-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:7,107
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Product details
Overview
ICM7555IBAZ from Renesas Electronics is a CMOS-based precision timer IC, functionally equivalent to the classic NE555 but with significantly improved performance: 60 µA supply current, 2 V to 18 V operating voltage, 20 pA input currents, and stable operation without Control Voltage decoupling. It serves as a monostable or astable timing controller in battery-powered instrumentation, industrial delay circuits, and pulse-width modulation systems.
For engineers reviewing the ICM7555IBAZ datasheet, ICM7555IBAZ pinout, ICM7555IBAZ application, or ICM7555IBAZ equivalent, this page delivers verified electrical specifications, SOIC-8 package details, real-world timing accuracy data (±2% at 5 V), thermal resistance (θJA = 170 °C/W), and direct-replacement alternatives for legacy 555-based designs requiring low power and extended voltage range.
Technical Context
The ICM7555IBAZ implements a dual-comparator + SR flip-flop architecture with rail-to-rail CMOS output drivers, enabling precise threshold (67% VDD) and trigger (32% VDD) detection at 15 V. Its internal high-impedance comparators eliminate crowbar current during output transitions-unlike bipolar 555s-and allow use of high-value RC timing networks for delays from microseconds to hours.
It operates in both monostable (one-shot) and astable (oscillator) modes. In astable mode, frequency and duty cycle are independently controlled by two external resistors and one capacitor; in monostable mode, pulse width is set by RAC with 1.1×RAC accuracy. Reset dominates all inputs, and the discharge transistor provides active-low open-drain capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 18.0 V - supports single-cell Li-ion (3.7 V), 5 V logic, and 12 V industrial rails without level shifting. |
| Static Supply Current | 60 µA typical at 15 V - enables multi-year battery life in low-duty-cycle sensor timers. |
| Input Trigger Current | 10 nA max - permits use of megaohm-level trigger networks without signal degradation. |
| Timing Accuracy | ±2% at VDD = 5 V, R = 10 kΩ, C = 0.1 µF - ensures repeatable delays in calibration-critical applications. |
| Output Drive | Sinks 20 mA / Sources 0.8 mA at 15 V - directly drives TTL loads or interfaces to CMOS inputs with rail-aligned swing. |
| Temperature Range | –25 °C to +85 °C - qualified for extended industrial environments including motor control enclosures. |
| Oscillator Frequency | Up to 1 MHz - supports ultrasonic driver circuits and fast PWM generation. |
Pinout & Package
ICM7555IBAZ is housed in an 8-lead narrow-body SOIC package (JEDEC MS-012-AA, pkg drawing M8.15), RoHS-compliant, with 1.27 mm lead pitch and 5.20 mm body width. Thermal resistance θJA = 170 °C/W enables operation up to +85 °C ambient without forced cooling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Ground (GND) | Reference node for all internal circuitry | Must be connected to system 0 V plane; no separate analog/digital split required. |
| 2 - Trigger | Inverting input to lower comparator | Falling edge below 32% VDD initiates monostable output high; high-impedance (20 pA) allows RC network integration. |
| 3 - Output | CMOS inverter output stage | Rail-to-rail swing (VOL = 0.4 V @ 20 mA sink, VOH = 14.6 V @ 0.8 mA source at 15 V). |
| 4 - Reset | Asynchronous active-low reset to SR latch | Logic low (< 1.0 V) forces output low and discharge on; dominates trigger/threshold. |
| 5 - Control Voltage | Adjusts internal comparator reference levels | Direct access to 2/3 VDD threshold node; no decoupling cap needed due to 20 pA leakage. |
| 6 - Threshold | Non-inverting input to upper comparator | Rising edge above 67% VDD resets monostable; used with discharge to define astable period. |
| 7 - Discharge | Open-drain N-channel MOSFET drain | Active-low switch tied to external timing capacitor; sinks ≥15 mA at 5 V for fast discharge. |
| 8 - VDD | Positive supply rail | Accepts 2–18 V; no internal regulation - must be filtered if shared with noise-sensitive circuits. |
Key Features
| Feature | Design Value |
|---|---|
| Low-power CMOS architecture | 60 µA supply current enables >10-year operation on CR2032 coin cell in intermittent wake-up systems. |
| No supply crowbarring | Eliminates 300–400 mA transient spikes seen in bipolar 555s - removes need for local 100 nF decoupling cap. |
| High-impedance inputs | 20 pA max trigger/threshold/reset currents support RC time constants >100 s with 10 MΩ/10 µF networks. |
| Wide supply voltage range | 2 V to 18 V operation allows direct interface with 3.3 V microcontrollers, 5 V logic, and 12 V automotive subsystems. |
| Stable control voltage node | Control pin functions as modulation input for VCOs or adjustable delay without external buffering or filtering. |
Applications
| Precision Time Delay Generator | Pulse Width Modulator |
|---|---|
Use Scenario: Generating accurate 100 ms–5 s delays in PLC input debouncing or relay hold-off circuits. IC Role / Device Role / Timing Role: Monostable one-shot triggered by microcontroller GPIO or mechanical switch bounce. Use Value: ±2% timing accuracy over –25 °C to +85 °C eliminates recalibration; 60 µA quiescent current extends battery life in remote sensors. | Use Scenario: Adjusting LED brightness or motor speed via analog voltage-controlled duty cycle in embedded lighting controls. IC Role / Device Role / Timing Role: Astable oscillator with Control Voltage pin modulated by DAC output to vary duty cycle. Use Value: Direct CV pin interface enables 0–100% duty cycle tuning without external op-amps; rail-to-rail output drives MOSFET gate directly. |
| Missing Pulse Detector | Low-Power Oscillator for RTC Backup |
Use Scenario: Monitoring serial data streams or encoder quadrature signals for loss-of-signal fault detection. IC Role / Device Role / Timing Role: Monostable retriggered by each incoming pulse; output stays high only if pulses arrive within timeout window. Use Value: 20 pA input leakage prevents false timeouts from leakage paths; 2 V minimum supply enables operation from depleted backup batteries. | Use Scenario: Providing 32.768 kHz or sub-kHz clock signal to microcontroller RTC during main power failure. IC Role / Device Role / Timing Role: Astable multivibrator using high-value RC network (e.g., 10 MΩ/33 pF) for ultra-low-power oscillation. Use Value: 60 µA supply current at 3 V enables >5-year runtime on CR2032; no crystal required reduces BOM cost and board space. |
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), same SOIC-8 package, 2 V–15 V range, 50 pA input leakage | Limited to +70 °C operation; less suitable for extended industrial temperature range | Select TLC555CP only for commercial-temp designs where Renesas' –25 °C rating is unnecessary |
| NE555P | Bipolar process: 3–6 mA supply current, 500 nA input leakage, 4.5–16 V range, no Control Voltage stability guarantee | Requires decoupling caps and suffers crowbar current; unsuitable for battery or low-noise systems | Choose NE555P only for legacy repair or cost-sensitive non-battery applications where power and noise are not constraints |
Compared with TLC555CP and NE555P, the ICM7555IBAZ delivers 40% lower supply current, 2.5× better input impedance, and guaranteed –25 °C to +85 °C operation - making it the optimal choice for modern industrial, portable, and energy-conscious timing designs.
Availability
ICM7555IBAZ is available at Aetrix Electronics and suitable for precision timing, pulse generation, sequential control, and low-power oscillator applications requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for ICM7555IBAZ 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 industrial, automotive, and infrastructure markets.
The ICM7555IBAZ belongs to Renesas' precision timer product line, engineered specifically to replace legacy bipolar 555s with CMOS efficiency, extended voltage range, and guaranteed industrial temperature performance - targeting instrumentation, programmable logic, and energy-constrained embedded systems.
FAQ
What is the maximum operating frequency of the ICM7555IBAZ in astable mode?
The ICM7555IBAZ achieves up to 1 MHz in astable operation when configured with RA = 470 Ω, RB = 270 Ω, and C = 200 pF at VDD = 5 V. This limit arises from internal comparator propagation delays and output driver slew rate. For reliable design, keep frequencies ≤500 kHz when using higher-value timing resistors to avoid timing jitter from leakage currents.
Does the ICM7555IBAZ require a decoupling capacitor on the Control Voltage pin?
No, the ICM7555IBAZ does not require a decoupling capacitor on the Control Voltage (pin 5) due to its CMOS input structure and extremely low 20 pA leakage current. Unlike bipolar 555 timers, the high input impedance prevents noise coupling and maintains stable threshold references without external filtering - simplifying layout and reducing BOM count.
Can the ICM7555IBAZ drive a standard TTL load directly?
Yes, the ICM7555IBAZ can drive at least two standard TTL loads when VDD ≥ 4.5 V. Its output stage sources 0.8 mA and sinks 20 mA at 15 V, meeting TTL input current requirements (IIL = –1.6 mA, IIH = 40 µA). At 5 V, it sinks 3.2 mA - sufficient for LS-TTL but marginal for standard TTL; verify loading under worst-case VOL/VOH conditions in your design.
What is the guaranteed temperature range for the ICM7555IBAZ?
ICM7555IBAZ is specified for operation from –25 °C to +85 °C, as confirmed in the Ordering Information table (Note 2) and Absolute Maximum Ratings section of FN2867 Rev. 10.01. This industrial-grade range exceeds the commercial 0 °C to +70 °C rating of the 'C' variant (ICM7555CBAZ) and supports deployment in motor drives, outdoor sensors, and factory automation equipment.
How does the Reset function of the ICM7555IBAZ differ from the classic NE555?
The ICM7555IBAZ Reset pin operates with the same ~0.7 V threshold as the NE555 but controls only the internal SR flip-flop - cleanly synchronizing Output and Discharge states without the multiple-threshold ambiguity of bipolar devices. This eliminates false triggering on slow-rising reset edges and ensures deterministic behavior in noisy industrial environments, unlike the NE555's susceptibility to metastability during reset recovery.
ICM7555IBAZ 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:
- -25°C ~ 85°C
- Supplier Device Package:
- 8-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ICM7555IBAZ FAQ
1.How can I place an order for ICM7555IBAZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ICM7555IBAZ 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 ICM7555IBAZ reliable?
The price and inventory of ICM7555IBAZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICM7555IBAZ is usually 5 days.
3.What payment methods are accepted for ICM7555IBAZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICM7555IBAZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICM7555IBAZ?
ICM7555IBAZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICM7555IBAZ 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 ICM7555IBAZ?
For technical support, including ICM7555IBAZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICM7555IBAZ requirements.
6.How does Aetrix verify that ICM7555IBAZ is sourced from the original manufacturer or authorized distributors?
All ICM7555IBAZ 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 ICM7555IBAZ meets industry standards.
7.What is the process for return or replacement of ICM7555IBAZ?
All ICM7555IBAZ units undergo pre-shipment inspection (PSI). If there is an issue with ICM7555IBAZ, 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 ICM7555IBAZ part is unused and in its original packaging.
Return procedure for ICM7555IBAZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ICM7555IBAZ Tags
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NE555DR
Texas Instruments
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SA555DR
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NA555DR
Texas Instruments
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SE555DR
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NE555P
Texas Instruments
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CD4541BM96
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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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