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Renesas REAR56958BGSM#HC0
- Part No.:
- REAR56958BGSM#HC0
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-SOIC (0.173", 4.40mm Width)
- Datasheet:
-
REAR56958BGSM#HC0.pdf
- Description:
- SD LINEAR2 LINEAR IC SOP(225)
- Quantity:
- Payment:
- Shipping:
Inventory:2,093
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Product details
Overview
REAR56958BGSM#HC0 from Renesas Electronics is a voltage-detecting system reset IC with adjustable detection threshold (1.25 V typical), open-collector output, and external capacitor-controlled delay (1.6–7.0 ms at 0.01 μF). It operates across 2–17 V supply range, draws 360–540 μA quiescent current, and targets microcontroller power-on reset and brownout protection in embedded systems.
For engineers reviewing the REAR56958BGSM#HC0 datasheet, REAR56958BGSM#HC0 pinout, REAR56958BGSM#HC0 application, or REAR56958BGSM#HC0 equivalent, key selection criteria include its programmable detection voltage via resistor divider, temperature-stable ±4% detection accuracy, wide operating temperature (−40 to +85 °C), and SOP-8 package compatibility with space-constrained PCB layouts.
Technical Context
The REAR56958BGSM#HC0 implements a precision bandgap reference (1.25 V ±4%) feeding a comparator with 9–23 mV hysteresis to prevent chatter during voltage transitions. Its internal constant-current source (−5 μA typical) charges an external capacitor on the Cd pin to generate a user-defined reset delay time.
It features an open-collector output stage capable of sinking up to 4 mA at 0.4 V saturation, supporting flexible pull-up configurations across 2–17 V logic domains. Input voltage is referenced to VCC (0.8 V to VCC − 0.3 V), enabling direct monitoring of regulated rails or divided supply voltages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Voltage | 1.25 V (typical), adjustable via external R1/R2 divider - sets reset trigger point for 2–15 V supply rails |
| Hysteresis | 9–23 mV - prevents oscillation during slow-rising/falling supply edges |
| Delay Time | 1.6–7.0 ms (at Cd = 0.01 μF) - externally programmable via capacitor on Cd pin |
| Supply Range | 2–17 V - supports wide-input industrial and battery-powered systems |
| Quiescent Current | 360–540 μA - enables low-power operation without compromising detection speed |
| Operating Temp | −40 to +85 °C - qualified for industrial ambient conditions |
| Output Type | Open-collector - allows level-shifting and wired-OR reset bus configurations |
Pinout & Package
REAR56958BGSM#HC0 is housed in an 8-pin plastic SOP (JEITA code P-LSOP8-4.4×5.2-1.27, Renesas code PLSP0008DE-A), measuring 5.2 mm × 6.5 mm with 1.27 mm pitch. Mass: 0.09 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal circuitry and output stage |
| 2 | Input | Voltage-sense node - accepts divided rail or direct supply; bias current ≤500 nA |
| 3 | NC | No connection - must be left floating or grounded per layout guidelines |
| 4 | Power-supply | VCC input - powers internal reference, comparator, and delay circuit |
| 5 | NC | No connection - must be left floating or grounded per layout guidelines |
| 6 | Delay capacitor | Cd terminal - connects external timing capacitor (4700 pF–10 μF) |
| 7 | Output | Open-collector reset output - sinks current when triggered; requires external pull-up |
| 8 | NC | No connection - must be left floating or grounded per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable detection threshold | Settable from 2 V to 15 V using two external resistors - eliminates need for multiple fixed-threshold ICs |
| Capacitor-programmable delay | Delay time scales linearly with Cd (td ≈ 0.34 × Cd(pF) μs) - enables precise reset timing without trimming |
| Wide supply voltage range | 2–17 V operation - supports single-supply designs from Li-ion battery (3.3 V) to 12 V industrial rails |
| Low input bias current | ≤500 nA at input pin - minimizes resistor-divider loading error and power loss |
| Stable over temperature | Detection voltage drift ≤0.01 %/°C - maintains accuracy across full −40 to +85 °C range |
Applications
| Microcontroller Power-On Reset | Battery Voltage Monitoring |
|---|---|
Use Scenario: Ensuring reliable initialization of 3.3 V or 5 V microcontrollers after power-up or brownout. IC Role / Device Role / Timing Role: System reset generator with programmable detection threshold and 1.6–7.0 ms delay to meet MCU reset timing requirements. Use Value: Prevents erratic startup by holding RESET active until VCC stabilizes above 2.66 V (TYP., set via R1/R2), with hysteresis avoiding chatter. | Use Scenario: Detecting end-of-life or low-voltage condition in 3–12 V battery-powered devices (e.g., portable meters, sensors). IC Role / Device Role / Timing Role: Precision voltage monitor triggering alert or shutdown when battery drops below configurable threshold. Use Value: Enables accurate 2–15 V detection range with ±4% accuracy, minimizing false triggers during load transients. |
| Waveform Shaping Circuit | Logic-Level Delay Generator |
Use Scenario: Converting noisy or slowly rising supply rails into clean, debounced digital reset signals. IC Role / Device Role / Timing Role: Input signal conditioner with built-in hysteresis and RC-based delay filtering. Use Value: Replaces discrete RC+Schmitt trigger circuits - reduces component count while improving timing consistency and temperature stability. | Use Scenario: Generating precise, repeatable delays (ms-scale) from logic pulses in timing-critical control subsystems. IC Role / Device Role / Timing Role: Monostable multivibrator with externally tunable pulse width via Cd capacitor. Use Value: Delivers 1.6–7.0 ms delay at 0.01 μF with <±20% variation - avoids crystal oscillator or microcontroller-based timing overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage-detecting reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803DBZT | Fixed 3.08 V detection; no external resistor adjustment; SOT-23-3 package | Limited to single-rail systems requiring 3.08 V threshold; no delay tuning | Select when board space is critical and fixed threshold suffices |
| MAX809SEUR+T | Fixed 3.08 V detection; 240 ms min delay; SOT-23-3; higher quiescent current (10 μA) | Designed for longer reset hold times; not suitable for sub-10 ms delay needs | Select for legacy 3.3 V systems needing guaranteed minimum delay |
Compared with TLV803DBZT and MAX809SEUR+T, the REAR56958BGSM#HC0 offers unique adjustability of both detection voltage (2–15 V) and delay time (via Cd), making it optimal for multi-rail or custom-timing designs where fixed-threshold alternatives require redesign or compromise.
Availability
REAR56958BGSM#HC0 is available at Aetrix Electronics and suitable for microcontroller reset, battery monitoring, waveform shaping, and logic-level delay generation requiring stable component supply and industrial-grade temperature performance.
Supply support for REAR56958BGSM#HC0 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 Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and timing solutions for automotive, industrial, and IoT applications.
The REAR56958B series belongs to Renesas' voltage-monitoring and system-reset IC product line, designed specifically for reliable power-on reset and brownout detection in cost-sensitive, space-constrained embedded systems.
FAQ
What is the detection voltage accuracy of the REAR56958BGSM#HC0?
The REAR56958BGSM#HC0 has a typical detection voltage of 1.25 V with ±4% accuracy over temperature and supply voltage. This specification accounts for device-to-device variation and ensures consistent reset behavior across production units without requiring calibration. The hysteresis (9–23 mV) further improves noise immunity during voltage transitions.
How do I calculate the required resistor values to set a specific detection voltage with the REAR56958BGSM#HC0?
To set a target detection voltage (VDET), use the formula VDET ≈ 1.25 × (R1 + R2)/R2, where R1 connects between VCC and the Input pin (pin 2), and R2 connects between Input and GND. For example, to achieve 2.66 V, use R1 = 11.3 kΩ and R2 = 10 kΩ. Keep total resistance ≤1 MΩ to limit error from input bias current (≤500 nA).
What is the maximum allowable delay capacitor value for the REAR56958BGSM#HC0?
The REAR56958BGSM#HC0 supports delay capacitors from 4700 pF to 10 μF. Capacitors larger than 10 μF cause significant delay-time variation (e.g., 100 μF yields 16–70 s instead of nominal 34 s), reduced responsiveness to momentary dips, and inaccurate timing due to insufficient discharge. Always stay within the 4700 pF–10 μF range for predictable operation.
Can the REAR56958BGSM#HC0 monitor a voltage rail different from its own supply voltage?
Yes - the REAR56958BGSM#HC0 supports independent monitoring of a separate voltage rail via its Input pin (pin 2), provided the input voltage stays within −0.3 V to VCC − 0.3 V (for VCC ≤ 7 V) or −0.3 V to 6.7 V (for VCC > 7 V). This enables monitoring of higher or lower rails than VCC, such as detecting 12 V supply drop while powered from 5 V.
What is the recommended pull-up resistor value for the open-collector output of the REAR56958BGSM#HC0?
For the REAR56958BGSM#HC0's open-collector output (pin 7), select a pull-up resistor RL so that sink current remains ≤4 mA at logic-low state. With VCC = 5 V and Vsat = 0.4 V, RL ≥ (5 − 0.4) V / 4 mA = 1.15 kΩ. A 10 kΩ resistor is commonly used for low-power applications; ensure RL does not exceed absolute max sink current (6 mA) under worst-case conditions.
REAR56958BGSM#HC0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Type:
- Voltage Detector
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.25V
- Output:
- Open Drain or Open Collector
- Reset:
- Active High
- Reset Timeout:
- 1.6ms Minimum
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOP
REAR56958BGSM#HC0 FAQ
1.How can I place an order for REAR56958BGSM#HC0 through Aetrix?
Please submit a Request for Quotation (RFQ) for REAR56958BGSM#HC0 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 REAR56958BGSM#HC0 reliable?
The price and inventory of REAR56958BGSM#HC0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REAR56958BGSM#HC0 is usually 5 days.
3.What payment methods are accepted for REAR56958BGSM#HC0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REAR56958BGSM#HC0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REAR56958BGSM#HC0?
REAR56958BGSM#HC0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REAR56958BGSM#HC0 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 REAR56958BGSM#HC0?
For technical support, including REAR56958BGSM#HC0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REAR56958BGSM#HC0 requirements.
6.How does Aetrix verify that REAR56958BGSM#HC0 is sourced from the original manufacturer or authorized distributors?
All REAR56958BGSM#HC0 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 REAR56958BGSM#HC0 meets industry standards.
7.What is the process for return or replacement of REAR56958BGSM#HC0?
All REAR56958BGSM#HC0 units undergo pre-shipment inspection (PSI). If there is an issue with REAR56958BGSM#HC0, 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 REAR56958BGSM#HC0 part is unused and in its original packaging.
Return procedure for REAR56958BGSM#HC0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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