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Renesas ICM7555IPAZ
- Part No.:
- ICM7555IPAZ
- Manufacturer:
- Renesas
- Category:
- Programmable Timers and Oscillators
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
ICM7555IPAZ.pdf
- Description:
- IC OSC SINGLE TIMER 1MHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:159,598
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Product details
Overview
ICM7555IPAZ 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 15 V, 2 V to 18 V operating voltage range, 20 pA input currents, and 1 MHz maximum oscillator frequency. It operates in both astable and monostable modes and is used for precision timing, pulse generation, and time-delay circuits in industrial control and instrumentation.
For engineers reviewing the ICM7555IPAZ datasheet, ICM7555IPAZ pinout, ICM7555IPAZ application, or ICM7555IPAZ equivalent, this page delivers verified technical context, real-world design implications of its low-power CMOS architecture, confirmed package mapping to 8-lead PDIP (E8.3), and two validated alternative parts with documented functional and application differences.
Technical Context
The ICM7555IPAZ implements a dual-comparator + SR flip-flop + discharge transistor architecture with rail-to-rail output swing and no crowbar current during transitions. Its CMOS input stage enables 20 pA trigger/threshold/reset currents, allowing high-impedance RC timing networks for delays from microseconds to hours.
Unlike bipolar 555 timers, it eliminates the need for Control Voltage decoupling and reduces supply decoupling requirements due to sub-3 mA transient currents. The device guarantees stable operation across –25°C to +85°C and supports adjustable duty cycle in astable mode via two external resistors and one capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 18.0 V - Enables single-supply operation across battery-powered (2 V) and industrial (12–15 V) systems without level-shifting. |
| Supply Current (Typ) | 60 µA at 15 V - Reduces system power budget by >99% vs. bipolar 555 (≈10 mA), enabling always-on timing in energy-constrained designs. |
| Input Current (Max) | 20 pA - Permits use of >10 MΩ timing resistors, extending monostable delay beyond 100 s with standard 10 nF capacitors. |
| Max Oscillator Frequency | 1 MHz - Supports high-speed waveform generation (e.g., PWM carrier signals) while maintaining ±2% timing accuracy. |
| Output Drive | Sinks 20 mA / Sources 0.8 mA - Directly drives TTL loads or interfaces to CMOS logic without buffer stages. |
| Timing Accuracy | ±2% (monostable/astable) - Achieves repeatable pulse widths and frequencies without calibration, critical for sequential timing. |
| Temp Stability | 0.005%/°C at +25°C - Minimizes drift over temperature in unregulated environments like motor controls or outdoor sensors. |
Pinout & Package
ICM7555IPAZ is housed in an 8-lead PDIP (Plastic Dual-In-Line Package) per JEDEC MS-001-BA ISSUE D (Package Drawing E8.3), with 0.300-inch body width and 0.100-inch lead pitch. RoHS-compliant matte tin plating (e3 finish) supports both SnPb and Pb-free soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Ground (GND) | Reference node for all internal comparators and output stage | Must be low-impedance connection; shared return path for timing network and load. |
| 2 - Trigger | Active-low input initiating monostable output pulse | Falling edge below 1/3 VDD sets internal flip-flop; 20 pA input current allows direct RC coupling without pull-up. |
| 3 - Output | CMOS inverter output driving external load | Rail-to-rail swing (VDD to GND); sources up to 0.8 mA, sinks up to 20 mA - directly interfaces TTL or CMOS logic. |
| 4 - Reset | Asynchronous active-low override of output state | Logic-low (<1.0 V) forces output LOW and discharge transistor ON - useful for emergency shutdown or synchronization. |
| 5 - Control Voltage | Adjusts internal comparator thresholds (2/3 VDD and 1/3 VDD) | Enables voltage-controlled frequency modulation (VCO mode) or programmable delay without external op-amps. |
| 6 - Threshold | Active-high input ending monostable pulse or setting astable period | Rising edge above 2/3 VDD resets flip-flop; high impedance permits direct RC network connection. |
| 7 - Discharge | Open-drain N-channel switch tied to internal transistor collector | Shorts external timing capacitor to GND during LOW output phase - essential for astable timing and capacitor reset. |
| 8 - VDD | Positive supply terminal | Accepts 2–18 V; no external decoupling required due to <3 mA supply transients - simplifies PCB layout. |
Key Features
| Feature | Design Value |
|---|---|
| Direct SE/NE555 replacement | Pin-compatible and functionally identical in most circuits - enables drop-in upgrade to lower power and higher precision. |
| No Control Voltage decoupling | Eliminates 10 nF capacitor at Pin 5 - reduces BOM count and board area in space-constrained designs. |
| No supply decoupling required | Removes mandatory 0.1 µF ceramic capacitor at VDD - lowers cost and improves reliability in low-noise analog sections. |
| High-impedance timing inputs | 20 pA max input leakage enables RC time constants >10⁶ s using standard passive components. |
| Wide supply range (2–18 V) | Operates from single-cell Li-ion (2.5 V) to 15 V industrial rails - avoids dedicated LDOs in multi-voltage systems. |
| Pb-free RoHS compliance | e3 matte tin termination - qualified for wave soldering only (not reflow), meeting global environmental regulations. |
Applications
| Precision Timing | Pulse Generation |
|---|---|
Use Scenario: Generating accurate 100 ms delay for microcontroller watchdog reset conditioning. IC Role / Device Role / Timing Role: Monostable one-shot producing fixed-duration HIGH pulse upon power-up or fault detection. Use Value: 60 µA quiescent current ensures minimal impact on battery life in portable medical monitors. |
Use Scenario: Creating 50% duty-cycle square wave at 10 kHz for ultrasonic transducer driver clocking. IC Role / Device Role / Timing Role: Astable multivibrator with RA = RB = 10 kΩ, C = 1 nF. Use Value: ±2% timing accuracy and 0.005%/°C tempco ensure stable acoustic output across –25°C to +85°C ambient. |
| Time Delay Generation | Missing Pulse Detection |
Use Scenario: Introducing 2 s delay between motor start and brake release in HVAC blower control. IC Role / Device Role / Timing Role: Monostable configured with RA = 2 MΩ, C = 1 µF for precise RC delay. Use Value: 20 pA input current prevents capacitor self-discharge errors, ensuring consistent 2.00 s ±10 ms delay. |
Use Scenario: Detecting loss of encoder pulses in servo position feedback loop. IC Role / Device Role / Timing Role: Monostable triggered by each encoder edge; output LOW indicates missing pulse if timeout expires. Use Value: 1 MHz max frequency supports detection of >100 kHz pulse trains, covering high-resolution motion control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar timer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC555CP | TI CMOS 555 with 100 µA supply current (vs. 60 µA), 1.5 MHz max frequency, SOIC-8 only - no PDIP option. | Higher supply current increases battery drain; lack of PDIP limits through-hole prototyping and legacy repair. | Select when SOIC footprint is preferred and 1.5 MHz speed justifies 67% higher IDD. |
| NE555P | Bipolar 555 with 10 mA supply current, 0.5 MHz max frequency, 500 nA input currents, and crowbar current requiring decoupling. | Cannot support high-impedance RC networks; unsuitable for ultra-low-power or long-delay (>1 s) applications. | Select only for cost-sensitive, non-battery, high-volume consumer products where layout simplicity outweighs power/performance. |
Compared with TLC555CP and NE555P, the ICM7555IPAZ delivers the lowest quiescent current (60 µA), widest supply range (2–18 V), and highest input impedance (20 pA) in a through-hole PDIP package - making it optimal for precision, low-power, and field-serviceable designs.
Availability
ICM7555IPAZ is available at Aetrix Electronics and suitable for precision timing, pulse generation, time delay generation, and missing pulse detection applications requiring stable component supply across industrial temperature ranges (–25°C to +85°C).
Supply support for ICM7555IPAZ 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 ICM7555IPAZ belongs to Renesas' legacy precision timer product line, designed specifically to replace bipolar 555 timers with CMOS efficiency while maintaining full functional and pin compatibility for seamless migration in industrial control, instrumentation, and power management systems.
FAQ
What is the operating temperature range for the ICM7555IPAZ?
The ICM7555IPAZ is rated for operation from –25°C to +85°C, as confirmed in the Ordering Information table (Note 2) and Absolute Maximum Ratings section of the FN2867 datasheet. This industrial-grade temperature range supports deployment in motor drives, factory automation, and outdoor sensor nodes where ambient conditions exceed commercial limits.
Does the ICM7555IPAZ require a decoupling capacitor on the VDD pin?
No, the ICM7555IPAZ does not require a VDD decoupling capacitor under normal operation. Its CMOS architecture limits supply current transients to 2–3 mA (vs. 300–400 mA in bipolar 555s), eliminating the need for local 0.1 µF ceramic bypassing - a key design simplification validated in Application Information Section "Power Supply Considerations".
Can the ICM7555IPAZ drive TTL logic directly?
Yes, the ICM7555IPAZ can drive at least two standard TTL loads when VDD ≥ 4.5 V, as specified in the "Output Drive Capability" section. Its output sinks 20 mA and sources 0.8 mA, providing sufficient current to meet TTL VIH/VIL thresholds and fan-out requirements without external buffers.
What is the maximum timing capacitor value supported by the ICM7555IPAZ?
The ICM7555IPAZ supports timing capacitors up to 1000 µF, enabled by its 20 pA input leakage. With a 10 MΩ timing resistor, this yields delays exceeding 100 seconds - a capability confirmed in the "Features" list ("Timing from microseconds through hours") and validated by low-leakage CMOS input structure.
Is the ICM7555IPAZ pin-compatible with the NE555P?
Yes, the ICM7555IPAZ is pin-compatible with the NE555P in the 8-lead PDIP package. Pin functions (GND, Trigger, Output, Reset, Control Voltage, Threshold, Discharge, VDD) match identically, and the datasheet explicitly states it is a "direct replacement for those devices in most applications", including identical pinout diagrams on Page 2.
ICM7555IPAZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
ICM7555IPAZ FAQ
1.How can I place an order for ICM7555IPAZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ICM7555IPAZ 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 ICM7555IPAZ reliable?
The price and inventory of ICM7555IPAZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICM7555IPAZ is usually 5 days.
3.What payment methods are accepted for ICM7555IPAZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICM7555IPAZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICM7555IPAZ?
ICM7555IPAZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICM7555IPAZ 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 ICM7555IPAZ?
For technical support, including ICM7555IPAZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICM7555IPAZ requirements.
6.How does Aetrix verify that ICM7555IPAZ is sourced from the original manufacturer or authorized distributors?
All ICM7555IPAZ 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 ICM7555IPAZ meets industry standards.
7.What is the process for return or replacement of ICM7555IPAZ?
All ICM7555IPAZ units undergo pre-shipment inspection (PSI). If there is an issue with ICM7555IPAZ, 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 ICM7555IPAZ part is unused and in its original packaging.
Return procedure for ICM7555IPAZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ICM7555IPAZ Tags
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SA555DR
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NA555DR
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SE555DR
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NE555P
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TLC555CP
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