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Renesas ICM7555CBAZ-T
- Part No.:
- ICM7555CBAZ-T
- Manufacturer:
- Renesas
- Category:
- Programmable Timers and Oscillators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICM7555CBAZ-T.pdf
- Description:
- IC OSC SINGLE TIMER 1MHZ 8-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:40,791
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Product details
Overview
ICM7555CBAZ-T from Renesas Electronics is a CMOS-based precision timer IC, functionally equivalent to the classic NE555 but with significantly improved supply current, input impedance, and voltage range. It operates as a monostable or astable multivibrator, delivering ±2% timing accuracy at 5V, 20pA input currents, and stable rail-to-rail output drive across 2V–18V supply. It is widely used in industrial timing circuits, pulse-width modulation, and missing-pulse detection where low power and long RC time constants are critical.
For engineers reviewing the ICM7555CBAZ-T datasheet, ICM7555CBAZ-T pinout, ICM7555CBAZ-T application, or ICM7555CBAZ-T equivalent, key selection considerations include its 60µA typical supply current at 15V, 20pA trigger/threshold input leakage, guaranteed 2V–18V operation, and SOIC-8 package compatibility with legacy 555 footprints - all while eliminating mandatory control-voltage decoupling capacitors.
Technical Context
The ICM7555CBAZ-T implements dual high-impedance CMOS comparators feeding an SR flip-flop, with a push-pull CMOS output stage capable of sourcing/sinking TTL/CMOS loads. Its internal threshold (2/3 VDD) and trigger (1/3 VDD) trip points are tightly regulated, enabling precise RC timing without external trimming.
Unlike bipolar 555 timers, it avoids crowbar current during output transitions, draws only 2–3mA transient supply current (vs. 300–400mA), and supports timing from microseconds to hours using high-impedance R/C networks - making it suitable for battery-powered and noise-sensitive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2V to 18V - enables direct use in single-cell Li-ion (3.0–4.2V), 5V logic, and 12V industrial rails without regulation. |
| Typical Supply Current | 60µA at 15V - reduces standby power by >99% vs. bipolar 555, extending battery life in portable timers. |
| Input Leakage Current | 20pA max - permits use of >10MΩ timing resistors for hour-scale delays without significant error. |
| Timing Accuracy | ±2% at TA = +25°C, RA=10kΩ, C=0.1µF - ensures repeatable pulse widths in precision one-shot circuits. |
| Max Oscillator Frequency | 1MHz at VDD=5V - supports high-speed PWM generation and clock synthesis up to audio band. |
| Output Drive | Sources 0.8mA / sinks 20mA at VDD=15V - directly drives LEDs, small relays, or TTL inputs without buffer stages. |
| Temperature Stability | 0.005%/°C at +25°C - minimizes drift in temperature-variable environments like automotive cabin modules. |
Pinout & Package
ICM7555CBAZ-T is housed in an 8-lead narrow-body SOIC package (JEDEC MS-012-AA, pkg drawing M8.15), RoHS-compliant, with 1.27mm lead pitch and 5.20mm body width. Pin 1 is marked by a beveled corner or index notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Common return path for all internal circuitry and external timing components; must be low-impedance. |
| 2 (TRIGGER) | Monostable start input | Falling edge below 1/3 VDD sets internal flip-flop; high-impedance (20pA) allows direct RC coupling. |
| 3 (OUTPUT) | Timer output | CMOS push-pull stage; rail-to-rail swing, capable of driving TTL or CMOS loads directly. |
| 4 (RESET) | Asynchronous reset | Active-low override; dominates trigger/threshold; 0.4–1.0V threshold ensures compatibility with standard logic levels. |
| 5 (CONTROL VOLTAGE) | Comparator reference adjust | Modifies internal 2/3 and 1/3 VDD thresholds; no decoupling capacitor required due to 20pA leakage. |
| 6 (THRESHOLD) | Astable mode end-of-cycle input | Rising edge above 2/3 VDD resets flip-flop; high-impedance interface enables clean RC integration. |
| 7 (DISCHARGE) | Timing capacitor discharge path | Open-drain NMOS switch tied to ground; synchronously controlled with OUTPUT for precise astable duty cycle. |
| 8 (VDD) | Positive supply | Accepts 2V–18V; low quiescent current enables operation from weak or unregulated sources. |
Key Features
| Feature | Design Value |
|---|---|
| Direct SE/NE555 replacement | Pin-compatible and functionally identical in monostable/astable modes, enabling drop-in upgrade without PCB change. |
| No control-voltage decoupling needed | Eliminates one external capacitor per timer, reducing BOM count and board area in multi-timer designs. |
| Ultra-low input bias current | 20pA maximum enables >100MΩ timing resistors, supporting hour-scale delays with standard capacitors. |
| No supply crowbarring | Removes need for local 100nF ceramic decoupling - simplifies layout and improves EMI performance. |
| Wide supply voltage range | 2V–18V operation supports direct connection to Li-ion, 3.3V, 5V, and 12V systems without LDOs or level shifters. |
Applications
| Precision Time Delay Generator | Pulse Width Modulation (PWM) Controller |
|---|---|
Use Scenario: Generating accurate on-time pulses for motor speed control or LED dimming in battery-powered tools. IC Role / Device Role / Timing Role: Monostable one-shot configured with external R/C to produce fixed-duration gate pulses synchronized to user input. Use Value: 60µA supply current extends runtime; ±2% timing accuracy ensures consistent brightness or torque across units. | Use Scenario: Creating variable-duty-cycle square waves for DC-DC converter feedback or analog signal generation. IC Role / Device Role / Timing Role: Astable multivibrator with RA/RB/C network controlling frequency and duty cycle independently. Use Value: 1MHz max frequency supports kHz-range switching; rail-to-rail output eliminates level-shifting for MOSFET gate drivers. |
| Missing Pulse Detector | Sequential Timing Controller |
Use Scenario: Monitoring periodic sensor signals (e.g., encoder pulses) and asserting fault flag if interval exceeds threshold. IC Role / Device Role / Timing Role: Monostable triggered by each incoming pulse; output remains high until next pulse arrives or timeout expires. Use Value: 20pA input leakage prevents false timeouts from stray currents; 2V–18V range allows direct interface with 3.3V sensors or 12V PLC inputs. | Use Scenario: Coordinating multi-stage processes in industrial automation, such as conveyor belt sequencing or valve actuation timing. IC Role / Device Role / Timing Role: Cascaded monostables where output of one triggers the next, creating deterministic time-ordered events. Use Value: Low drift (0.005%/°C) ensures timing consistency across ambient temperature variations in factory floors. |
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 100µA supply current; 50pA input leakage; 1.5V–15V range; DIP-8 only | Limited to lower-voltage systems; less suitable for 18V industrial rails or ultra-low-power battery use | Select TLC555CP only when legacy DIP footprint or TI ecosystem alignment is required. |
| NE555P | Bipolar process; 10mA supply current; 500nA input leakage; requires control-voltage decoupling | Generates large supply transients; unsuitable for noise-sensitive or low-power designs | Choose NE555P only for cost-driven, non-critical applications where power and precision are secondary. |
Compared with TLC555CP and NE555P, the ICM7555CBAZ-T delivers superior power efficiency (60µA vs. 100µA/10mA), lower input leakage (20pA vs. 50pA/500nA), wider voltage range (2–18V vs. 1.5–15V/4.5–16V), and eliminates mandatory decoupling - making it optimal for modern low-power, high-precision timing.
Availability
ICM7555CBAZ-T is available at Aetrix Electronics and suitable for precision timing, pulse generation, sequential control, and missing-pulse detection requiring stable component supply across industrial, instrumentation, and embedded design cycles.
Supply support for ICM7555CBAZ-T 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-T belongs to Renesas' legacy precision timer product line, designed specifically to replace bipolar 555 timers with CMOS-level efficiency, stability, and integration - targeting cost-sensitive yet performance-demanding industrial and consumer timing functions.
FAQ
What is the operating temperature range for the ICM7555CBAZ-T?
The ICM7555CBAZ-T is rated for commercial temperature operation from 0°C to +70°C, as confirmed in the Ordering Information table of the FN2867 datasheet. This range aligns with standard industrial ambient conditions and supports use in office equipment, test instruments, and non-automotive embedded systems where extended temperature grades are not required.
Does the ICM7555CBAZ-T require a decoupling capacitor on the Control Voltage pin?
No, the ICM7555CBAZ-T does not require a decoupling capacitor on the Control Voltage (pin 5) due to its CMOS input structure and extremely low 20pA leakage current. Unlike bipolar 555 timers, its high-impedance comparators eliminate the need for external stabilization, simplifying design and reducing component count - a verified feature documented in the Application Information section of FN2867 Rev.10.01.
Can the ICM7555CBAZ-T operate from a 3.3V supply?
Yes, the ICM7555CBAZ-T fully supports 3.3V operation within its guaranteed 2V–18V supply range. At 3.3V, it maintains functional timing accuracy, rail-to-rail output swing (VOH ≈ 3.3V, VOL < 0.4V), and 20pA input leakage - enabling direct integration into modern 3.3V microcontroller systems without level shifting or voltage translation.
Is the ICM7555CBAZ-T pin-compatible with the NE555?
Yes, the ICM7555CBAZ-T is pin-compatible with the NE555 in the 8-pin SOIC (M8.15) package, matching pin assignments for GND, TRIGGER, OUTPUT, RESET, CONTROL VOLTAGE, THRESHOLD, DISCHARGE, and VDD. This enables direct PCB-level replacement in existing designs, provided layout accommodates SOIC-8 dimensions and thermal profile.
What is the maximum load the ICM7555CBAZ-T output can drive?
The ICM7555CBAZ-T output can sink up to 20mA at VDD = 15V (VOL ≤ 1.0V) and source up to 0.8mA (VOH ≥ 14.3V), as specified in the Electrical Specifications table. This allows direct driving of LEDs, small relays, optocouplers, or TTL/CMOS logic inputs - though for >5mA loads, verify voltage margins at the target supply voltage using the VOH/VOL curves in Figures 9–11 of FN2867.
ICM7555CBAZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-T FAQ
1.How can I place an order for ICM7555CBAZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ICM7555CBAZ-T 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-T reliable?
The price and inventory of ICM7555CBAZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICM7555CBAZ-T is usually 5 days.
3.What payment methods are accepted for ICM7555CBAZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICM7555CBAZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICM7555CBAZ-T?
ICM7555CBAZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICM7555CBAZ-T 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-T?
For technical support, including ICM7555CBAZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICM7555CBAZ-T requirements.
6.How does Aetrix verify that ICM7555CBAZ-T is sourced from the original manufacturer or authorized distributors?
All ICM7555CBAZ-T 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-T meets industry standards.
7.What is the process for return or replacement of ICM7555CBAZ-T?
All ICM7555CBAZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ICM7555CBAZ-T, 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-T part is unused and in its original packaging.
Return procedure for ICM7555CBAZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ICM7555CBAZ-T 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
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