My Inquiry
My Account
Renesas ISL8702AIBZ-T
- Part No.:
- ISL8702AIBZ-T
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ISL8702AIBZ-T.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,533
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL8702AIBZ-T from Renesas (formerly Intersil) is a quad-channel, delay-adjustable power supply sequencer with integrated under/overvoltage monitoring for distributed rail supervision. It delivers four programmable enable outputs (ENABLE_A–D), supports 3.3V–24V input bias, provides UV/OV fault detection with 1.21V typical threshold, and features SEQ_EN control for on/off sequencing - used in FPGA, DSP, and multi-rail embedded systems requiring precise power-up/down timing.
For engineers reviewing the ISL8702AIBZ-T datasheet, ISL8702AIBZ-T pinout, ISL8702AIBZ-T application, or ISL8702AIBZ-T equivalent, key selection considerations include its 14-lead SOIC package, adjustable sequencing delays via external R/C components, ±104mV UV/OV hysteresis, FAULT reporting capability, and compatibility with hot-swap and high-reliability industrial power architectures.
Technical Context
The ISL8702AIBZ-T implements a voltage-compliance-gated sequencing engine: only when the monitored rail (via UV/OV pins) remains within 1.06V–1.28V thresholds does it initiate the A→B→C→D enable sequence. Its internal 2.6µA TIME pin current source charges an external capacitor to generate the initial delay before ENABLE_A assertion, while TB/TC/TD pins each drive independent RC-based timers controlling inter-output delays.
It supports bidirectional sequencing: SEQ_EN high enables power-up (A→B→C→D); SEQ_EN low triggers controlled shutdown (D→C→B→A). FAULT output asserts low during valid operation and releases high upon UV/OV violation, enabling direct connection to system supervisors or microcontroller interrupt inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 3.3V to 24V nominal bias supply - powers IC directly from system rail without auxiliary LDO. |
| UV/OV Threshold | 1.21V typical rising threshold - sets ±10% window for 12V rail monitoring using standard resistor dividers. |
| TIME Pin Current | 2.6µA constant current - enables accurate, temperature-stable delay timing with external capacitor (e.g., 10nF → 7.7ms). |
| Delay Resolution | 0.5ms to 435ms per stage - achieved via 0Ω–500kΩ resistors on TB/TC/TD pins for fine-grained sequencing control. |
| FAULT Response | 30µs typical VIN-invalid-to-FAULT-high - ensures rapid fault propagation for system-level safety-critical shutdown. |
| Operating Temp | -40°C to +85°C - qualified for industrial and extended-temperature embedded applications. |
| Package | 14-lead SOIC (M14.15) - surface-mount compatible with standard PCB assembly and thermal management. |
Pinout & Package
ISL8702AIBZ-T is housed in a 14-lead narrow-body SOIC package (JEDEC MS-012, package drawing M14.15), with 1.27mm lead pitch and RoHS-compliant matte tin terminations.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | ENABLE_D | Active-high open-drain sequenced output; asserted last in power-up, deasserted first in shutdown. |
| 2 | ENABLE_C | Active-high open-drain sequenced output; asserted third in power-up, deasserted second in shutdown. |
| 3 | ENABLE_B | Active-high open-drain sequenced output; asserted second in power-up, deasserted third in shutdown. |
| 4 | ENABLE_A | Active-high open-drain sequenced output; asserted first in power-up, deasserted last in shutdown. |
| 5 | VIN | Bias input (3.3V–24V); powers internal regulators and requires 1µF local decoupling. |
| 6 | TD | Timing resistor input for D-stage delay; sets time between ENABLE_C and ENABLE_D transitions. |
| 7 | TC | Timing resistor input for C-stage delay; sets time between ENABLE_B and ENABLE_C transitions. |
| 8 | TB | Timing resistor input for B-stage delay; sets time between ENABLE_A and ENABLE_B transitions. |
| 9 | SEQ_EN | Active-high sequencing enable input; internally pulled up to ~2.4V; initiates or halts sequencing on edge. |
| 10 | TIME | 2.6µA current-source output; charges external capacitor to set delay from SEQ_EN/VIN-valid to ENABLE_A. |
| 11 | OV | Overvoltage monitor input; trips if voltage exceeds 1.21V threshold (e.g., >13.2V for 12V rail). |
| 12 | UV | Undervoltage monitor input; trips if voltage falls below 1.21V threshold (e.g., <10.8V for 12V rail). |
| 13 | GND | Analog/digital ground reference; must be low-impedance and tied to system power ground plane. |
| 14 | FAULT | Open-drain fault indicator; released high during UV/OV violation; pulled low during normal operation. |
Key Features
| Feature | Design Value |
|---|---|
| Four independent enable outputs | ENABLE_A–D support staggered power-up/down of DC/DC converters, FPGAs, and memory subsystems without external logic. |
| Adjustable UV/OV monitoring | Configurable trip points via external resistor dividers - eliminates need for discrete comparators and reference ICs. |
| Programmable sequencing delays | TIME capacitor sets first-stage delay; TB/TC/TD resistors independently tune inter-output intervals (ms to hundreds of ms). |
| SEQ_EN-controlled bidirectional sequencing | Single-pin command enables deterministic power-down order (D→C→B→A), critical for safe hot-swap and graceful shutdown. |
| Integrated FAULT reporting | Open-drain output signals rail compliance status directly to MCU GPIO or supervisor IC - no external pull-up required for active-low use. |
Applications
| Server Power Management | FPGA-Based Accelerator Cards |
|---|---|
|
Use Scenario: Sequencing 12V, 5V, 3.3V, and 1.2V rails in rack-mounted servers with strict ramp-rate and hold-time requirements. IC Role / Device Role / Timing Role: Centralized sequencer enforcing voltage monotonicity and inter-rail timing constraints per Intel VRD/IMVP specs. Use Value: Eliminates discrete timer ICs and manual firmware sequencing, reducing BOM count and startup validation effort by >40%. |
Use Scenario: Powering Xilinx Kintex Ultrascale+ FPGA with auxiliary I/O banks, transceivers, and core logic requiring staggered enable timing. IC Role / Device Role / Timing Role: Hardware-enforced power-up sequence ensuring configuration integrity and preventing latch-up during partial reconfiguration. Use Value: Guarantees ENABLE_A (I/O bank) asserts 5ms before ENABLE_B (transceiver), meeting Xilinx DS925 tPOWERON timing requirement. |
| Industrial PLC Backplanes | Medical Imaging Power Subsystems |
|
Use Scenario: Managing redundant 24V input rails and isolated 5V/3.3V/±15V analog supplies in modular PLC chassis with hot-swap capability. IC Role / Device Role / Timing Role: Fault-aware sequencer that halts enable progression on OV/UV detection and asserts FAULT to PLC controller for diagnostics. Use Value: Enables Class C EMC-compliant soft-start and prevents brownout-induced firmware corruption during field maintenance. |
Use Scenario: Coordinating CT scanner detector module supplies (high-voltage bias, analog front-end, digital processing) with fail-safe interlocks. IC Role / Device Role / Timing Role: Safety-critical sequencer where FAULT output disables HV generator enable path within 30µs of undervoltage detection. Use Value: Meets IEC 62304 Class B software safety requirements by providing hardware-level sequencing assurance independent of MCU firmware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power supply sequencing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65023RSBR | Triple-buck PMIC with integrated sequencing logic but fixed 3-output topology and no external UV/OV monitoring pins. | Limited to single-chip power conversion; lacks independent rail monitoring and SEQ_EN-controlled shutdown. | Choose for cost-sensitive, space-constrained designs where integrated regulation outweighs sequencing flexibility. |
| MAX16050ATA+ | Quad sequencer with identical 14-SOIC footprint and UV/OV monitoring, but uses internal oscillator (no external R/C timing) and lacks SEQ_EN bidirectional control. | Supports only unidirectional sequencing; FAULT output is push-pull, not open-drain. | Prefer when deterministic fixed-delay timing suffices and open-drain FAULT interfacing is unnecessary. |
Compared with TPS65023RSBR and MAX16050ATA+, the ISL8702AIBZ-T uniquely combines fully adjustable inter-stage delays, hardware-controlled bidirectional sequencing via SEQ_EN, and dedicated open-drain FAULT reporting - making it optimal for complex, field-serviceable, or safety-certified multi-rail systems.
Availability
ISL8702AIBZ-T is available at Aetrix Electronics and suitable for server power management, FPGA-based accelerator cards, industrial PLC backplanes, and medical imaging power subsystems requiring stable component supply across long product lifecycles.
Supply support for ISL8702AIBZ-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 Corporation acquired Intersil in 2017 and maintains full technical and manufacturing continuity for legacy Intersil precision analog and power management products.
The ISL8702AIBZ-T belongs to the ISL870xA family of programmable power sequencers designed specifically for high-reliability, multi-rail embedded systems where voltage compliance and deterministic sequencing timing are non-negotiable.
FAQ
What is the minimum external component count required for basic ISL8702AIBZ-T operation?
The ISL8702AIBZ-T requires only five external components for functional operation: one 1µF VIN decoupling capacitor, one capacitor on the TIME pin (e.g., 10nF), and three resistors on TB, TC, and TD pins to set inter-output delays. UV/OV monitoring needs two additional resistors for the divider string, but these may be omitted if voltage compliance is enforced elsewhere.
Can ISL8702AIBZ-T monitor voltages outside its 3.3V–24V VIN range?
Yes - the ISL8702AIBZ-T can monitor any voltage ≥1.22V using external resistor dividers on the UV and OV pins. Its internal 1.21V reference allows scaling of higher rails (e.g., 48V, 60V) down to the comparator input range, enabling supervision of primary-side or battery-input rails independent of the IC's own bias supply.
How does ISL8702AIBZ-T handle simultaneous UV and OV faults?
The ISL8702AIBZ-T treats UV and OV violations identically: either condition causes immediate release of the FAULT pin (pulling it high) and simultaneous reset of all ENABLE_A–D outputs to their inactive state. The FAULT signal remains asserted until both UV > 1.21V and OV < 1.21V are concurrently satisfied, ensuring robust fault latching.
Is ISL8702AIBZ-T pin-compatible with other members of the ISL870xA family?
Yes - all ISL870xA variants (ISL8700A–ISL8705A) share identical 14-lead SOIC packaging and pinout. The ISL8702AIBZ-T differs functionally from ISL8700A/01A by including SEQ_EN and FAULT pins, and from ISL8704A/05A by using active-high SEQ_EN instead of active-low SEQ_EN#, but mechanical and electrical pin mapping is fully consistent.
What is the maximum recommended value for the TIME capacitor in ISL8702AIBZ-T designs?
The datasheet specifies a maximum TIME capacitor value of 1µF to ensure reliable charging within operational temperature and voltage ranges. Larger values risk incomplete charging before timeout or excessive delay variation due to leakage current; for delays beyond 435ms, use the SEQ_EN-controlled mode with external timing circuitry rather than increasing CTIME.
ISL8702AIBZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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
ISL8702AIBZ-T FAQ
1.How can I place an order for ISL8702AIBZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8702AIBZ-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 ISL8702AIBZ-T reliable?
The price and inventory of ISL8702AIBZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8702AIBZ-T is usually 5 days.
3.What payment methods are accepted for ISL8702AIBZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8702AIBZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8702AIBZ-T?
ISL8702AIBZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8702AIBZ-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 ISL8702AIBZ-T?
For technical support, including ISL8702AIBZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8702AIBZ-T requirements.
6.How does Aetrix verify that ISL8702AIBZ-T is sourced from the original manufacturer or authorized distributors?
All ISL8702AIBZ-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 ISL8702AIBZ-T meets industry standards.
7.What is the process for return or replacement of ISL8702AIBZ-T?
All ISL8702AIBZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL8702AIBZ-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 ISL8702AIBZ-T part is unused and in its original packaging.
Return procedure for ISL8702AIBZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL8702AIBZ-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…
