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Renesas ICM7242IBAZ
- Part No.:
- ICM7242IBAZ
- Manufacturer:
- Renesas
- Category:
- Programmable Timers and Oscillators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICM7242IBAZ.pdf
- Description:
- IC OSC BINARY CTC PROG 8-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,324
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Product details
Overview
ICM7242IBAZ from Intersil is a CMOS long-range fixed timer IC comprising an RC oscillator and an 8-bit binary counter, delivering ÷2 and ÷128/256 buffered outputs. It operates from 2V to 16V, draws only 115µA at 5V, and supports timing ranges from microseconds to days in monostable or astable mode-used in machine tool controllers and electro-pneumatic sequencers.
For engineers reviewing the ICM7242IBAZ datasheet, ICM7242IBAZ pinout, ICM7242IBAZ application, or ICM7242IBAZ equivalent, key selection criteria include its wide supply range, low quiescent current, cascading capability, RC-based timing flexibility, and compatibility with legacy 2242 socket layouts while eliminating external pullup resistors.
Technical Context
The ICM7242IBAZ integrates an internal RC oscillator feeding an 8-bit ripple counter chain with dual buffered outputs: one at ÷2 (RC/2) and another selectable between ÷128 and ÷256 (RC/128 or RC/256). Its TRIGGER and RESET inputs operate with TTL-compatible thresholds that scale with VDD (e.g., VTRIG = 1.6–2.0V at 5V).
It features active pullups on all outputs (no open-drain), eliminates external timing resistors required by the 2242, and supports both free-running (astable) and single-shot (monostable) operation via feedback from ÷256 output to RESET. The TB I/O pin serves as timebase input/output with ≤50pF capacitive loading limit for reliable counting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2V to 16V - enables direct use across battery-powered (2V) and industrial rail (15V) systems without regulation. |
| Supply Current (Typ) | 115µA at 5V - allows multi-year operation on coin cells in low-duty-cycle timing applications. |
| Timing Accuracy | ±5% - sufficient for non-critical industrial sequencing where absolute precision is secondary to reliability and simplicity. |
| Max Toggle Rate | 6MHz at 5V - supports high-speed divider operation when driven externally, beyond RC oscillator limits. |
| RC Timing Range | RT = 1kΩ–22MΩ, CT = 10pF min - enables timing intervals from ~10µs to >10 days using standard passive components. |
| Operating Temp Range | –25°C to +85°C - qualified for extended-temperature industrial environments, unlike commercial-grade 2242 (0°C to +70°C). |
| Output Drive | 300µA sourcing / 1.0mA sinking - directly interfaces with CMOS logic or small relays without buffer stages. |
Pinout & Package
ICM7242IBAZ is housed in an 8-lead narrow-body SOIC package (JEDEC MS-012-AA, M8.15), measuring 4.9mm × 3.9mm × 1.75mm, RoHS-compliant with 100% matte tin terminations.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VDD) | Positive Supply Rail | Accepts 2V–16V; powers internal oscillator, counter, and output buffers. |
| 2 (÷2 OUT) | Buffered ÷2 Output | Provides RC/2 frequency signal with active pullup; used for intermediate timing or cascading. |
| 3 (÷128/256 OUT) | Buffered Divider Output | Selectable division ratio; drives reset in monostable mode or feeds next stage in cascade. |
| 4 (VSS) | Ground Reference | Return path for all internal circuits; must be low-impedance for stable timing. |
| 5 (TB I/O) | Timebase Input/Output | Bi-directional node: outputs RC oscillator waveform or accepts external clock up to 6MHz. |
| 6 (TRIGGER) | Edge-Triggered Start Input | Positive-edge sensitive; initiates counter sequence and overrides RESET when asserted. |
| 7 (RC) | Oscillator Timing Node | Connects external R and C; internal discharge transistor resets capacitor on trigger edge. |
| 8 (RESET) | Asynchronous Reset Input | Active-high; forces counter to zero state and disables outputs until next TRIGGER event. |
Key Features
| Feature | Design Value |
|---|---|
| Cascadable Architecture | Enables multi-stage timing chains (e.g., seconds → minutes → hours) without external logic gates. |
| No External Pullup Resistors Required | Integrated active pullups eliminate four external resistors needed by 2242, reducing BOM count and board space. |
| Monostable/Astable Dual Mode | Configurable via feedback routing: astable for continuous oscillation, monostable for single-shot delays. |
| Wide-Voltage Operation (2V–16V) | Eliminates need for level-shifting or voltage regulation in mixed-rail systems or battery-depleted conditions. |
| Low-Power RC Oscillator Core | Draws <125µA in reset state and <800µA during operation - ideal for energy-constrained embedded timers. |
Applications
| Machine Tool Sequencing | Electro-Pneumatic Control |
|---|---|
|
Use Scenario: Coordinating multi-step machining cycles (e.g., clamp → drill → retract → unclamp) with precise dwell times. IC Role / Device Role / Timing Role: Primary long-range timer generating 5s–10s enable pulses per operation phase via RC configuration. Use Value: Replaces electromechanical timers with solid-state reliability, no contact wear, and immunity to vibration-induced timing drift. |
Use Scenario: Controlling solenoid valve timing in automated packaging lines for fill-hold-seal sequences. IC Role / Device Role / Timing Role: Monostable pulse generator triggered by limit switches to activate pneumatic actuators for fixed durations. Use Value: Delivers repeatable 100ms–5s delays without microcontroller overhead, reducing firmware complexity and cost. |
| Injection Molding Cycle Timer | Automatic Lubrication System |
|
Use Scenario: Managing mold cooling, injection, and ejection phases over 10–120 second intervals per cycle. IC Role / Device Role / Timing Role: Astable oscillator driving cascaded ICM7242IBAZ units to generate multi-minute timing windows. Use Value: Achieves sub-1% timing stability over temperature without crystal support, lowering system BOM vs. MCU+RTC solutions. |
Use Scenario: Triggering grease pumps at fixed intervals (e.g., every 8 hours) in CNC machine maintenance routines. IC Role / Device Role / Timing Role: Low-power free-running timer using high-value RC network (e.g., 10MΩ + 1µF) for ~10-hour period. Use Value: Enables years of operation on AA batteries due to 115µA typical supply current, eliminating mains wiring or frequent battery swaps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar long-range timer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICM7242IPAZ | Same die, PDIP-8 package; wider lead pitch (0.3" vs. 0.15") and higher θJA (100°C/W vs. 160°C/W). | Better suited for prototyping or through-hole assembly; less suitable for high-density PCBs. | Select ICM7242IPAZ for breadboarding or wave-soldered industrial boards where SOIC reflow is unavailable. |
| NE555 (LM555) | No internal counter; requires external dividers for long intervals; higher supply current (2–5mA); limited to ~1MHz max. | Only viable for sub-second timing; impractical for multi-second/minute intervals without added logic. | Choose NE555 only for simple one-shot or oscillator tasks under 1s; avoid for cascaded or low-power long-range timing. |
Compared with ICM7242IBAZ, the ICM7242IPAZ offers identical functionality in through-hole form but sacrifices board-area efficiency, while the NE555 lacks integrated division and consumes >20× more current-making ICM7242IBAZ the optimal choice for compact, battery-operated, multi-stage timing systems.
Availability
ICM7242IBAZ is available at Aetrix Electronics and suitable for machine automation, process control, electro-pneumatic drivers, and multi-operation sequential timing requiring stable component supply across extended temperature ranges.
Supply support for ICM7242IBAZ 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
Intersil Corporation is a precision analog and power management semiconductor provider, now part of Renesas Electronics, with deep expertise in industrial-timing and low-power CMOS IC design.
The ICM7242 product line was engineered specifically for robust, low-component-count long-range timing in factory automation and mechanical control systems-replacing aging 2242 designs with enhanced voltage range, lower power, and simplified layout.
FAQ
What is the primary function of the ICM7242IBAZ?
The ICM7242IBAZ is a CMOS long-range fixed timer IC integrating an RC oscillator and an 8-bit binary counter. It generates precise timing intervals from microseconds to days using external R and C components, delivering two buffered outputs (÷2 and ÷128/256) for sequencing, cascading, or monostable triggering. Its design replaces the older 2242 with reduced external parts and wider operating margins.
Can the ICM7242IBAZ operate from a 3.3V supply?
Yes, the ICM7242IBAZ supports supply voltages from 2V to 16V, making it fully compatible with 3.3V systems. At 3.3V, timing accuracy remains within ±5%, trigger and reset thresholds scale accordingly (e.g., VTRIG ≈ 1.1–1.3V), and supply current drops below 100µA-ideal for low-voltage embedded timers.
How does the ICM7242IBAZ differ from the 2242 in practical design?
The ICM7242IBAZ eliminates four external pullup resistors required by the 2242, supports a wider voltage range (2–16V vs. 4–15V), extends temperature range to –25°C to +85°C, reduces supply current by >90% (115µA vs. 7mA), and doubles max toggle rate (6MHz vs. 0.5MHz). It also removes the need for a resistor to inhibit oscillation or series reset resistors in monostable mode.
Is the ICM7242IBAZ pin-compatible with the 2242?
No, the ICM7242IBAZ is not pin-compatible with the 2242. While it can plug into the same socket *if* the 2242's external pullup resistors are removed, pin functions differ: the 2242 uses dedicated oscillator pins and open-drain outputs, whereas the ICM7242IBAZ has active pullups and repurposed terminals (e.g., TB I/O instead of separate OSC IN/OUT). Layout redesign is required for drop-in replacement.
What is the maximum capacitive load allowed on the TB I/O pin of the ICM7242IBAZ?
The TB I/O pin of the ICM7242IBAZ must be loaded with ≤50pF when used to drive the internal counter section. Exceeding this capacitance risks miscounting due to slowed edge transitions. For higher loads, buffer the TB output with a CMOS inverter before connecting to downstream logic or long traces.
ICM7242IBAZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Counter/Timer Circuit (CTC), Binary
- Count:
- 128/256
- Frequency:
- 0.1Hz ~ 13MHz
- Voltage - Supply:
- 2V ~ 16V
- Current - Supply:
- 340 µA
- Operating Temperature:
- -25°C ~ 85°C
- Supplier Device Package:
- 8-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ICM7242IBAZ FAQ
1.How can I place an order for ICM7242IBAZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ICM7242IBAZ 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 ICM7242IBAZ reliable?
The price and inventory of ICM7242IBAZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICM7242IBAZ is usually 5 days.
3.What payment methods are accepted for ICM7242IBAZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICM7242IBAZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICM7242IBAZ?
ICM7242IBAZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICM7242IBAZ 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 ICM7242IBAZ?
For technical support, including ICM7242IBAZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICM7242IBAZ requirements.
6.How does Aetrix verify that ICM7242IBAZ is sourced from the original manufacturer or authorized distributors?
All ICM7242IBAZ 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 ICM7242IBAZ meets industry standards.
7.What is the process for return or replacement of ICM7242IBAZ?
All ICM7242IBAZ units undergo pre-shipment inspection (PSI). If there is an issue with ICM7242IBAZ, 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 ICM7242IBAZ part is unused and in its original packaging.
Return procedure for ICM7242IBAZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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