My Inquiry
My Account
Renesas ISL8702IBZ-T
- Part No.:
- ISL8702IBZ-T
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ISL8702IBZ-T.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:7,718
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL8702IBZ-T from Intersil is an adjustable quad power supply sequencer IC that monitors a single distributed voltage (2.5V–12V) for undervoltage and overvoltage compliance, then generates four programmable, time-delayed ENABLE outputs in A→B→C→D order. It features SEQ_EN input for controlled on/off sequencing, FAULT reporting, and operates across –40°C to +85°C in 14-lead SOIC.
For engineers reviewing the ISL8702IBZ-T datasheet, ISL8702IBZ-T pinout, ISL8702IBZ-T application, or ISL8702IBZ-T equivalent, this device supports precise power-up/down timing control in multi-rail FPGA, DSP, and µP systems where voltage window monitoring and daisy-chain expandability are required.
Technical Context
The ISL8702IBZ-T implements a dual-threshold UV/OV comparator with 1.21 V typical rising threshold and 104 mV hysteresis, referenced to internal 1.17 V regulator. Voltage compliance must be met before sequencing initiates - enforced via TIME pin charging (2.6 µA current source) and internal 2.0 V comparator threshold.
Sequencing delay between ENABLE outputs is resistor-programmable: TB sets A→B delay (3.5–240 ms), TC sets B→C, TD sets C→D. Off-sequencing (D→C→B→A) is triggered only by SEQ_EN low assertion and is exclusive to ISL8702IBZ-T among the family.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.5 V to 12 V nominal; supports biasing of IC and monitoring of external rail up to 12 V |
| UV/OV Threshold | 1.21 V typical rising threshold; enables ±10% window setting for 12 V rail via external resistor divider |
| TIME Pin Current | 2.6 µA constant current source; defines VIN-to-ENABLE_A delay with external capacitor (e.g., 10 nF → 7.7 ms) |
| SEQ_EN Function | Active-high enable input; initiates on-sequencing when high, triggers off-sequencing (D→C→B→A) when pulled low |
| FAULT Output | Open-drain active-low signal; asserts within 30 µs of UV/OV violation; reports real-time voltage compliance status |
| Operating Temp | –40°C to +85°C; validated across full range for industrial embedded power management |
| Package | 14-lead SOIC (M14.15); RoHS-compliant, matte tin e3 termination, MSL-3 rated |
Pinout & Package
ISL8702IBZ-T is housed in a 14-lead SOIC package (JEDEC MS-012, Intersil drawing M14.15), with 1.27 mm lead pitch and 8.65 mm × 3.90 mm body dimensions. Thermal resistance θJA = 110°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: ENABLE_D | Active-high open-drain output | Final sequenced enable signal; pulled low if UV/OV fault occurs or SEQ_EN deasserted |
| 2: ENABLE_C | Active-high open-drain output | Third enable output; delayed after ENABLE_B by RC network on TC pin |
| 3: ENABLE_B | Active-high open-drain output | Second enable output; delayed after ENABLE_A by RC network on TB pin |
| 4: ENABLE_A | Active-high open-drain output | First enable output; released after TIME capacitor charges to 2.0 V threshold |
| 5: OV | Overvoltage sense input | Monitors upper voltage limit; trips if voltage exceeds 1.21 V (referenced to internal 1.17 V) |
| 6: UV | Undervoltage sense input | Monitors lower voltage limit; trips if voltage falls below 1.21 V (referenced to internal 1.17 V) |
| 7: GND | Ground reference | Primary return path for internal regulators and comparator circuitry |
| 8: FAULT | Open-drain fault indicator | Pulled high externally; goes high within 30 µs of UV/OV violation to signal out-of-window condition |
| 9: SEQ_EN | Sequencing enable input | Internally pulled up to VIN; low assertion triggers controlled D→C→B→A shutdown sequence |
| 10: TIME | Timing capacitor node | Sinks 2.6 µA; delay from VIN/SEQ_EN valid to ENABLE_A is set by CTIME to GND |
| 11: TB | Timing resistor input | Resistor to GND sets A→B delay (3.5–240 ms); controls internal oscillator charge rate |
| 12: TC | Timing resistor input | Resistor to GND sets B→C delay; independent timing channel for second stage |
| 13: TD | Timing resistor input | Resistor to GND sets C→D delay; enables asymmetric sequencing intervals |
| 14: VIN | Supply and bias input | Provides IC power (2.5–12 V); requires ≥1 µF local decoupling; POR threshold = 2.08 V |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable UV/OV monitoring | Configurable trip points via 3-resistor divider; supports 12 V ±10% window with <10 mV temp drift |
| Programmable on/off sequencing | Four independent delays (TIME, TB, TC, TD); off-sequence D→C→B→A only on ISL8702IBZ-T |
| SEQ_EN-controlled sequencing | Enables system-level coordination: start on high, stop on low - no external logic required |
| FAULT reporting with fast response | Sub-50 µs fault detection and assertion; compatible with microcontroller GPIO interrupt inputs |
| Daisy-chain expandability | Multiple ISL8702IBZ-T units can be cascaded to manage >4 rails without additional timing ICs |
Applications
| Server Power Management | FPGA Configuration Sequencing |
|---|---|
Use Scenario: Multi-rail server motherboard with 12 V, 5 V, 3.3 V, and 1.2 V supplies powering CPU, memory, and I/O. IC Role / Device Role / Timing Role: ISL8702IBZ-T monitors 12 V rail and sequences enable signals to DC/DC converters in strict voltage ramp order. Use Value: Prevents latch-up and back-powering during hot-swap events by enforcing 12 V validity before releasing downstream enables. |
Use Scenario: High-end FPGA (e.g., Xilinx Kintex) requiring precise power-up order: VCCINT → VCCAUX → VCCO → VREF. IC Role / Device Role / Timing Role: ISL8702IBZ-T acts as dedicated sequencing controller, using TB/TC/TD resistors to set 10 ms, 25 ms, and 50 ms inter-rail delays. Use Value: Eliminates need for FPGA-internal configuration sequencing logic, reducing bitstream complexity and startup time uncertainty. |
| Industrial PLC Power System | Medical Imaging Power Subsystem |
Use Scenario: Programmable logic controller with isolated 24 V input, 5 V logic, 3.3 V MCU, and analog sensor rails. IC Role / Device Role / Timing Role: ISL8702IBZ-T monitors 24 V input and sequences enables to isolated DC/DC modules, with FAULT tied to PLC watchdog timer. Use Value: Ensures analog sensors power up only after stable digital rails - critical for ADC reference integrity and noise immunity. |
Use Scenario: MRI subsystem requiring fail-safe power sequencing: main HV supply → cooling pump → detector bias → signal chain. IC Role / Device Role / Timing Role: ISL8702IBZ-T uses SEQ_EN to initiate shutdown on emergency stop signal, executing controlled D→C→B→A deactivation. Use Value: Guarantees detector bias is removed before signal chain power loss - prevents transient injection into sensitive front-end amplifiers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power supply sequencing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65023RSLR | Integrated PMIC with LDOs/DC-DCs; fixed 3-rail sequencing; no SEQ_EN-controlled off-sequence | Best for compact, integrated power solutions where rail count ≤3 and external monitoring not needed | Select if board space is constrained and sequencing requirements are static |
| MAX16050ATA+ | Quad sequencer with wider VIN (up to 28 V); supports independent UV/OV thresholds per rail; no off-sequencing | Suitable for higher-voltage industrial systems (>12 V) requiring per-rail fault reporting | Select if monitoring >12 V rails or needing individual rail UV/OV configuration |
Compared with TPS65023RSLR and MAX16050ATA+, the ISL8702IBZ-T uniquely delivers programmable off-sequencing via SEQ_EN, supports 2.5–12 V monitoring with minimal external components, and enables daisy-chained expansion - making it optimal for flexible, field-upgradable multi-rail systems.
Availability
ISL8702IBZ-T is available at Aetrix Electronics and suitable for FPGA configuration, server power management, industrial PLCs, medical imaging subsystems, and telecom infrastructure requiring stable component supply and long-term design-in support.
Supply support for ISL8702IBZ-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
Intersil Corporation (now part of Renesas Electronics) designs high-performance analog and power management ICs for industrial, computing, and communications markets.
The ISL8702IBZ-T belongs to the ISL870x quad sequencer product line, engineered specifically for reliable, resistor-programmable power-up/down sequencing in multi-supply systems with voltage window monitoring.
FAQ
What is the maximum input voltage rating for ISL8702IBZ-T?
The absolute maximum rating for VIN on the ISL8702IBZ-T is 14 V. Its nominal operating range is 2.5 V to 12 V. Exceeding 14 V risks permanent damage. This differs from the ISL8700/ISL8701, which support up to 27 V on VIN. The 14 V limit is explicitly specified in the Absolute Maximum Ratings table on page 3 of FN9250 Rev 2.00.
Does ISL8702IBZ-T support both power-up and power-down sequencing?
Yes, the ISL8702IBZ-T supports bidirectional sequencing. Power-up (A→B→C→D) initiates automatically after UV/OV compliance and TIME capacitor charge. Power-down (D→C→B→A) is triggered exclusively by pulling SEQ_EN low - a feature unique to ISL8702IBZ-T within the ISL870x family. This enables controlled, reverse-order shutdown in safety-critical applications.
How is the undervoltage and overvoltage threshold set on ISL8702IBZ-T?
The ISL8702IBZ-T uses a single 3-resistor divider (Ru, Rm, Rl) connected to UV and OV pins to set both thresholds relative to its internal 1.17 V reference. The UV threshold is determined by Ru/(Rm+Rl), and OV by (Ru+Rm)/Rl. Example values for 12 V ±10% are Ru = 90.9 kΩ, Rm = 1.13 kΩ, Rl = 9.31 kΩ - yielding 10.9 V UV fall and 13.3 V OV rise, as verified in the datasheet's application example.
Can ISL8702IBZ-T monitor voltages outside its 2.5–12 V VIN range?
Yes - while VIN must be 2.5–12 V, the monitored voltage (VMONITOR) can exceed that range when scaled via external resistor divider. The UV/OV inputs accept any voltage >1.22 V referenced to GND. For example, a 48 V rail can be monitored using a 40:1 divider to present 1.2 V to UV/OV pins, provided the divider current stays within noise-immunity limits (10–100 µA typical).
What is the purpose of the FAULT pin on ISL8702IBZ-T?
The FAULT pin is an open-drain output that goes high (pulled externally) within 30 µs of any UV or OV violation, signaling loss of voltage compliance. It remains asserted until the monitored voltage re-enters the valid window. FAULT can drive microcontroller interrupts, LED indicators, or latching shutdown circuits - providing real-time fault visibility without software polling.
ISL8702IBZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Sequencer
- Number of Voltages Monitored:
- 4
- Voltage - Threshold:
- Adjustable/Selectable
- Output:
- Open Drain or Open Collector
- Reset:
- Active High/Active Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
ISL8702IBZ-T FAQ
1.How can I place an order for ISL8702IBZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8702IBZ-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 ISL8702IBZ-T reliable?
The price and inventory of ISL8702IBZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8702IBZ-T is usually 5 days.
3.What payment methods are accepted for ISL8702IBZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8702IBZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8702IBZ-T?
ISL8702IBZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8702IBZ-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 ISL8702IBZ-T?
For technical support, including ISL8702IBZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8702IBZ-T requirements.
6.How does Aetrix verify that ISL8702IBZ-T is sourced from the original manufacturer or authorized distributors?
All ISL8702IBZ-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 ISL8702IBZ-T meets industry standards.
7.What is the process for return or replacement of ISL8702IBZ-T?
All ISL8702IBZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL8702IBZ-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 ISL8702IBZ-T part is unused and in its original packaging.
Return procedure for ISL8702IBZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL8702IBZ-T Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
