My Inquiry
My Account
Renesas X28HC256JIZ-90
- Part No.:
- X28HC256JIZ-90
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
X28HC256JIZ-90.pdf
- Description:
- IC EEPROM 256KBIT PAR 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,372
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
X28HC256JIZ-90 from Intersil is a 32k × 8-bit (256 kbit), 5V-only, byte-alterable CMOS EEPROM with 90 ns access time, -40°C to +85°C industrial temperature range, and 32-lead PLCC RoHS-compliant package. It delivers high-reliability nonvolatile storage for firmware configuration, calibration data, and system parameter retention in embedded controllers and industrial PLCs.
For engineers reviewing the X28HC256JIZ-90 datasheet, X28HC256JIZ-90 pinout, X28HC256JIZ-90 application, or X28HC256JIZ-90 equivalent, key selection criteria include its 100,000 write-cycle endurance, 100-year data retention, 128-byte page write capability (≤0.8 s full rewrite), DATA/Toggle bit polling support, and JEDEC software data protection - all under single 5V supply operation without external high-voltage circuitry.
Technical Context
The X28HC256JIZ-90 implements a textured poly floating gate EEPROM cell architecture enabling direct-write operation without erase-before-write. Its dual-line control (CE/OE/WE) supports bus contention-free read/write sequencing and enables low-power standby mode (500 µA) via CE-driven power gating.
It integrates early write completion detection via I/O7 DATA polling (complement-read signaling) and I/O6 toggle-bit monitoring, both compliant with standard read cycle timing. Page write logic enforces A7–A14 address stability across up to 128 consecutive byte loads, with ≤100 µs inter-byte timing window before automatic internal programming begins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 32k × 8-bit (256 kbit) - supports full byte-addressable storage for configuration tables and runtime variables in microcontroller-based systems. |
| Access time | 90 ns - enables direct interfacing with 8-bit MCUs operating at ≤10 MHz without wait states. |
| Write endurance | 100,000 cycles per byte - ensures long-term reliability in field-updatable applications such as sensor calibration and device personalization. |
| Data retention | 100 years - guarantees nonvolatile data integrity over product lifetime without battery backup. |
| Supply voltage | 5 V ±10% - compatible with legacy 5V logic families and eliminates need for level-shifting in industrial control boards. |
| Operating temperature | -40°C to +85°C - qualified for use in extended-temperature industrial environments including motor drives and factory automation equipment. |
| Page write capacity | 128 bytes - reduces firmware update latency by enabling bulk writes with typical full-memory rewrite in <0.8 s. |
Pinout & Package
Package: 32-lead PLCC (RoHS-compliant), JEDEC MS-016AE, body size 12.32 mm × 14.86 mm × 3.18 mm (N32.45x55).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address inputs | 15-bit address bus selecting one of 32,768 byte locations; A7–A14 must remain stable during page write sequences. |
| I/O0–I/O7 | Bi-directional data bus | 8-bit parallel interface for read/write operations; I/O6 and I/O7 serve dual role as toggle-bit and data-polling status indicators. |
| CE | Chip Enable | Active-low primary device select; when HIGH, places device in low-power standby (500 µA) and disables outputs. |
| OE | Output Enable | Active-low control for output buffers; used with CE to initiate reads and prevent bus contention in multi-device memory arrays. |
| WE | Write Enable | Active-low write strobe; latches data on rising edge (with CE) and initiates byte or page write cycles. |
| VCC / VSS | Power / Ground | +5V supply and return; requires local 0.1 µF ceramic decoupling per device per datasheet recommendation. |
| NC | No Connect | Pins 1, 12, 17, 26 - electrically isolated; must not be connected to PCB traces or power rails. |
Key Features
| Feature | Design Value |
|---|---|
| Direct Write™ cell technology | Enables true byte-alterable writes without prior erase, eliminating block management overhead in firmware storage. |
| 128-byte page write | Reduces average write time by >95% vs. individual byte writes - critical for fast field updates in medical and test equipment. |
| DATA polling (I/O7) | Allows host MCU to poll completion status using simple bit-test loop, removing dependency on external interrupt lines or timers. |
| Toggle bit polling (I/O6) | Eliminates need to store last written address/data for polling - simplifies software implementation in multi-device EEPROM arrays. |
| JEDEC software data protection | Nonvolatile lock mechanism prevents accidental writes during power transitions; activated via 3-byte unlock sequence to fixed addresses. |
Applications
| Industrial PLC Configuration Storage | Medical Device Calibration Data Retention |
|---|---|
Use Scenario: Storing I/O mapping, PID tuning parameters, and alarm thresholds in programmable logic controllers deployed in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile configuration register bank accessed during boot and runtime via 8-bit parallel bus; 90 ns access ensures deterministic scan-cycle timing. Use Value: 100,000 write cycles and -40°C to +85°C rating guarantee reliable parameter updates over 10+ years of continuous operation without recalibration. | Use Scenario: Holding sensor offset/gain coefficients and patient-specific therapy settings in portable diagnostic instruments requiring FDA-compliant data integrity. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage element with software lock; accessed only during calibration routines or user-initiated setup. Use Value: JEDEC software protection prevents unintended writes during power-up/down transients, satisfying IEC 62304 data safety requirements. |
| Automotive Body Control Module EEPROM | Test & Measurement Equipment Setup Memory |
Use Scenario: Saving seat/mirror position presets, lighting profiles, and door lock configurations in 12V automotive body control units. IC Role / Device Role / Timing Role: 5V-tolerant EEPROM interfaced directly to 8-bit automotive MCU; operates across full vehicle battery range (4.5–5.5 V) with robust ESD immunity. Use Value: 100-year data retention ensures settings persist over vehicle lifetime without battery backup or refresh cycles. | Use Scenario: Maintaining instrument calibration constants, user-defined measurement ranges, and front-panel layout preferences in benchtop oscilloscopes and signal analyzers. IC Role / Device Role / Timing Role: High-speed configuration store accessed during power-on self-test and menu navigation; 90 ns access avoids UI latency. Use Value: 128-byte page write enables full calibration table reload in <0.8 s - critical for production line throughput and field service efficiency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT28C256-15PU | 150 ns access time; PDIP-28 package; 5V-only; 100K endurance; no built-in software data protection. | Limited to commercial temp (0°C to +70°C); lacks JEDEC software lock - requires external hardware or firmware safeguards. | Select when cost-sensitive, through-hole assembly is required, and software protection is implemented externally. |
| MX28LV256A-90P | 90 ns access; PLCC-32; 3.3V/5V tolerant; 100K endurance; supports both software and hardware write protection. | Wider VCC range (2.7–5.5 V); higher standby current (1 mA); different pinout - not pin-compatible. | Select for mixed-voltage systems or where 3.3V compatibility adds design flexibility, accepting PCB redesign. |
Compared with AT28C256-15PU and MX28LV256A-90P, the X28HC256JIZ-90 uniquely combines industrial temperature rating, RoHS-compliant PLCC packaging, integrated JEDEC software lock, and guaranteed 90 ns performance - making it optimal for long-lifecycle, safety-critical embedded applications where layout reuse and data integrity are mandatory.
Availability
X28HC256JIZ-90 is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostics equipment, automotive body control modules, and test & measurement instrumentation requiring stable component supply across extended product lifecycles.
Supply support for X28HC256JIZ-90 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 pioneer in high-reliability analog and nonvolatile memory solutions, specializing in power management and precision timing products for industrial, infrastructure, and high-end consumer markets.
The X28HC256 product line was designed specifically for robust, 5V-only embedded systems requiring field-updatable configuration storage with guaranteed endurance and data retention - targeting applications where firmware resilience and long-term data integrity are non-negotiable.
FAQ
What is the maximum write speed achievable with X28HC256JIZ-90?
The X28HC256JIZ-90 supports 128-byte page writes, enabling full 256 kbit memory rewrite in typically less than 0.8 seconds. Individual byte writes complete in ≤5 ms (tWC), and early completion can be detected via DATA polling (I/O7) or Toggle bit (I/O6), reducing effective write latency by up to 50% in optimized firmware implementations. The X28HC256JIZ-90 does not require external high-voltage programming pulses.
Does X28HC256JIZ-90 require external high-voltage circuitry for programming?
No, the X28HC256JIZ-90 operates with a single 5V supply and requires no external high-voltage circuitry. Its Direct Write™ floating-gate technology enables byte-alterable writes using only standard TTL-level signals (CE, OE, WE). All internal programming voltages are generated on-chip, simplifying board design and eliminating risk of voltage-related programming errors in the X28HC256JIZ-90.
How does software data protection work on X28HC256JIZ-90?
Software data protection on the X28HC256JIZ-90 is enabled via a JEDEC-standard 3-byte unlock sequence (AAh to 5555h, 55h to 2AAAh, A0h to 5555h) preceding any write. Once set, the X28HC256JIZ-90 remains write-protected until the sequence is repeated. Protection persists across power cycles and prevents inadvertent writes during power-up/down transients.
What is the pin compatibility status of X28HC256JIZ-90 with other X28HC256 variants?
The X28HC256JIZ-90 shares identical 32-lead PLCC pinout and signal definitions with all X28HC256 PLCC variants (e.g., X28HC256JI-90, X28HC256JZ-90), differing only in temperature grade (-40°C to +85°C) and RoHS compliance. It is not pin-compatible with PDIP or SOIC variants due to different lead counts and physical layouts. The X28HC256JIZ-90 requires no PCB changes when replacing same-package variants.
Can X28HC256JIZ-90 be used in systems with 3.3V logic interfaces?
The X28HC256JIZ-90 is specified for 5V ±10% operation and uses TTL-compatible input thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V), making it interoperable with 3.3V systems only if level translation is provided on CE, OE, WE, and address/data lines. Direct connection to 3.3V GPIO may result in marginal noise margins or unreliable writes; the X28HC256JIZ-90 is not 3.3V-tolerant.
X28HC256JIZ-90 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 256Kbit
- Memory Organization:
- 32K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 90 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
X28HC256JIZ-90 FAQ
1.How can I place an order for X28HC256JIZ-90 through Aetrix?
Please submit a Request for Quotation (RFQ) for X28HC256JIZ-90 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 X28HC256JIZ-90 reliable?
The price and inventory of X28HC256JIZ-90 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X28HC256JIZ-90 is usually 5 days.
3.What payment methods are accepted for X28HC256JIZ-90?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X28HC256JIZ-90 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X28HC256JIZ-90?
X28HC256JIZ-90 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X28HC256JIZ-90 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 X28HC256JIZ-90?
For technical support, including X28HC256JIZ-90 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X28HC256JIZ-90 requirements.
6.How does Aetrix verify that X28HC256JIZ-90 is sourced from the original manufacturer or authorized distributors?
All X28HC256JIZ-90 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 X28HC256JIZ-90 meets industry standards.
7.What is the process for return or replacement of X28HC256JIZ-90?
All X28HC256JIZ-90 units undergo pre-shipment inspection (PSI). If there is an issue with X28HC256JIZ-90, 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 X28HC256JIZ-90 part is unused and in its original packaging.
Return procedure for X28HC256JIZ-90:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
X28HC256JIZ-90 Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
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…
