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Renesas HN27C4096AG12
- Part No.:
- HN27C4096AG12
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 40-CDIP (0.600", 15.24mm) Window
- Datasheet:
-
HN27C4096AG12.pdf
- Description:
- IC EPROM 4MBIT PARALLEL 40CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,395
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Product details
Overview
HN27C4096AG12 from Hitachi is a 4-Mbit (262,144-word × 16-bit) UV-erasable and electrically programmable ROM designed for high-speed 16-bit microcomputer systems. It features 120 ns maximum access time, +12.5 V programming voltage, and TTL-compatible I/O during both read and program modes. It supports page programming with 3.5 sec minimum programming time and is used in legacy 80286/68020-based embedded control and firmware storage.
For engineers reviewing the HN27C4096AG12 datasheet, HN27C4096AG12 pinout, HN27C4096AG12 application, or HN27C4096AG12 equivalent, this page delivers verified electrical specs, JEDEC-standard 40-pin CERDIP package mapping, UV-erase compatibility, fast page programming timing, and direct alternatives for firmware ROM replacement in industrial and computing legacy designs.
Technical Context
The HN27C4096AG12 implements a 2,048 × 2,048 memory matrix with X- and Y-decoders, supporting full 18-bit address space (A0–A17) and 16-bit bidirectional data bus (I/O0–I/O15). Its dual-voltage operation uses VCC = 5 V ±10% for read mode and VPP = +12.5 V ±0.3 V for programming, with strict sequencing requirements (VCC applied before VPP, removed after).
It operates in multiple functional modes-Read, Standby, Page Program Set, Page Data Latch, Page Program, Page Program Verify, Word Program, and Device Identifier-controlled by CE, OE, A9, and VPP logic levels. Mode selection requires precise voltage thresholds: VH on OE = 12.0 V ±0.5 V for page programming entry, and VPP ≤ VCC to reset page mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory capacity | 4 Mbit (262,144 × 16-bit); provides full 16-bit data path for 80286/68020 CPU interfaces without byte-lane splitting. |
| Access time (max) | 120 ns; enables direct interface with 8 MHz 80286 systems without wait states. |
| Programming voltage | +12.5 V DC on VPP pin; requires external high-voltage supply and strict sequencing relative to VCC. |
| Page programming time | 3.5 sec minimum; reduces total firmware burn time vs. word-by-word programming in production programming fixtures. |
| Standby current | 5 µW typical; supports low-power retention in powered-down system states. |
| UV erase dose | ≥15 W·sec/cm² at 2537 Å; ensures full bit reset to "1" after standard EPROM eraser exposure (15–20 min). |
| I/O compatibility | TTL-compatible inputs and outputs in both read and program modes; eliminates level-shifter requirement in legacy 5 V logic systems. |
Pinout & Package
HN27C4096AG12 is packaged in a 40-pin ceramic dual in-line package (CERDIP, DG-40A), compliant with JEDEC MS-011. Pin 1 is top-left corner with notch orientation; body width 15.51 mm max, length 53.34 mm max, height 6.30 mm max.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VPP | Programming power supply input; must be +12.5 V ±0.3 V during programming; requires strict sequencing with VCC. |
| 2 | CE | Chip enable active-low; controls device selection; must be VIL for read/program operations. |
| 3–10, 12–19 | I/O0–I/O15 | 16-bit bidirectional data bus; TTL-compatible; carries address-latched data during page programming. |
| 20 | OE | Output enable active-low; controls output driver enable; driven to 12.0 V ±0.5 V to enter page program mode. |
| 21 | A0 | LSB address input; part of full 18-bit address bus (A0–A17) decoding 262,144 words. |
| 31 | A9 | Address bit used as mode control input; driven to 12.0 V ±0.5 V during device identifier mode. |
| 40 | VCC | Primary power supply; 5 V ±10% for read mode; 6.25 V ±0.25 V for programming mode. |
Key Features
| Feature | Design Value |
|---|---|
| Page programming algorithm | Reduces total firmware programming time by latching 256-byte pages before verification, avoiding per-word overhead. |
| Device identifier mode | Outputs manufacturer code 07h and device code A2h on I/O0–I/O15 when A9 = 12.0 V, enabling auto-algorithm selection in universal programmers. |
| UV-erasable architecture | Quartz window package allows field or lab reprogramming after erasure under 2537 Å UV light (≥15 W·sec/cm²). |
| Low-power standby | 5 µW typical consumption enables energy-efficient firmware storage in always-on industrial controllers. |
| JEDEC-standard pinout | 40-pin CERDIP footprint matches industry-standard EPROM sockets, enabling drop-in replacement for 27C4096-family devices. |
Applications
| Industrial Control Firmware Storage | Legacy PC BIOS ROM |
|---|---|
|
Use Scenario: Storing fixed ladder logic and motion control algorithms in programmable logic controllers (PLCs) operating in factory environments with ambient temperatures up to +70°C. IC Role / Device Role / Timing Role: Nonvolatile firmware ROM providing boot-time instruction fetch and runtime constant lookup for 16-bit microcontrollers. Use Value: UV-erasability allows field updates after equipment deployment; 120 ns access time supports real-time I/O scanning without CPU wait states. |
Use Scenario: Holding BIOS initialization code and hardware abstraction layer for 1980s–1990s IBM PC/AT-compatible systems using Intel 80286 CPUs. IC Role / Device Role / Timing Role: Primary boot ROM mapped to upper memory segment (F0000h–FFFFFh), accessed via 16-bit data bus and 20-bit address lines. Use Value: TTL-compatible I/O eliminates level translation; JEDEC 40-pin footprint enables socket replacement without PCB redesign. |
| Embedded Instrumentation Calibration Data | Telecom Line Card Bootloader |
|
Use Scenario: Storing calibrated sensor coefficients and linearization tables in benchtop multimeters and oscilloscopes requiring long-term data stability. IC Role / Device Role / Timing Role: Read-only memory storing factory-trimmed constants accessed during power-on self-test (POST) and measurement processing. Use Value: 5 µW standby current minimizes battery drain in portable instruments; UV erasure permits recalibration data updates during service cycles. |
Use Scenario: Hosting bootloader firmware for T1/E1 line interface cards in telecom central office equipment using Motorola 68020 processors. IC Role / Device Role / Timing Role: Early-boot execution memory providing hardware initialization and FPGA configuration loading prior to DRAM activation. Use Value: 120 ns access time meets tight timing budgets for 68020's 12.5 MHz bus cycle; page programming accelerates field firmware upgrades. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM27C4096-12DC | Same 4-Mbit ×16 organization, 120 ns access, 40-pin CERDIP, but uses +21 V programming voltage instead of +12.5 V. | Requires higher-voltage programmer; not compatible with HN27C4096AG12's page programming flow due to different VPP threshold and timing. | Select only if existing programming infrastructure supports +21 V and UV-erase workflow is unchanged. |
| MX27C4096PC-12 | Pin-compatible 40-pin CERDIP, 120 ns access, but rated for industrial temperature (–40°C to +85°C) and specifies 100,000 erase cycles vs. unspecified for HN27C4096AG12. | Higher reliability margin for extended-life deployments; same UV-erase and TTL I/O behavior enables direct substitution in most legacy designs. | Preferred for new designs requiring extended temperature range or guaranteed endurance; verify UV window transmission match. |
Compared with AM27C4096-12DC, HN27C4096AG12 reduces programming voltage stress and simplifies power supply design; compared with MX27C4096PC-12, it offers identical timing and footprint but lacks published endurance and extended temperature validation-making MX27C4096PC-12 suitable for harsher environments where long-term reliability is critical.
Availability
HN27C4096AG12 is available at Aetrix Electronics and suitable for industrial control firmware storage, legacy PC BIOS replacement, embedded instrumentation calibration data retention, and telecom line card bootloader applications requiring stable component supply across extended product lifecycles.
Supply support for HN27C4096AG12 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
Hitachi Ltd. (now Renesas Electronics Corporation) was a Japanese multinational conglomerate specializing in semiconductor memory, microcontrollers, and industrial systems before merging its semiconductor business into Renesas in 2003.
HN27C4096AG12 belongs to Hitachi's HN27C4096A EPROM family, engineered for high-speed, low-power, UV-erasable firmware storage in 16-bit microcomputer systems including 80286 and 68020 platforms.
FAQ
What is the programming voltage requirement for HN27C4096AG12?
HN27C4096AG12 requires +12.5 V DC ±0.3 V on the VPP pin during programming. VCC must be applied before VPP and removed after VPP; exceeding 13 V (including overshoot) risks reliability degradation. This differs from older 27C4096 variants requiring +21 V, reducing stress on programming hardware.
Does HN27C4096AG12 support page programming, and what is its benefit?
Yes, HN27C4096AG12 supports fast high-reliability page programming with a minimum 3.5 sec programming time. This mode latches 256 bytes of data before verification, cutting total firmware burn time significantly versus word-by-word programming-critical for high-volume manufacturing and field updates.
How is the HN27C4096AG12 erased, and what UV dose is required?
HN27C4096AG12 is erased using ultraviolet light at 2537 Å wavelength. A minimum integrated dose of 15 W·sec/cm² is required to fully reset all bits to "1". Standard EPROM erasers deliver this in 15–20 minutes; incomplete exposure may leave residual data, so quartz window cleanliness and lamp intensity must be verified.
What package type does HN27C4096AG12 use, and is it socket-compatible?
HN27C4096AG12 uses a 40-pin ceramic dual in-line package (CERDIP, DG-40A) conforming to JEDEC MS-011. Its pinout matches industry-standard 27C4096-family sockets, enabling direct mechanical and electrical replacement in legacy systems without PCB modification.
Can HN27C4096AG12 operate in both 5 V and 6.25 V VCC configurations?
Yes-HN27C4096AG12 operates at VCC = 5 V ±10% for read mode and VCC = 6.25 V ±0.25 V during programming. The dual-voltage design ensures compatibility with standard 5 V logic while providing sufficient headroom for reliable high-speed programming under varying load conditions.
HN27C4096AG12 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 40-CDIP (0.600", 15.24mm) Window
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EPROM
- Technology:
- EPROM - UV
- Memory Size:
- 4Mbit
- Memory Organization:
- 256K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- -
- Access Time:
- 120 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 40-CDIP
HN27C4096AG12 FAQ
1.How can I place an order for HN27C4096AG12 through Aetrix?
Please submit a Request for Quotation (RFQ) for HN27C4096AG12 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 HN27C4096AG12 reliable?
The price and inventory of HN27C4096AG12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HN27C4096AG12 is usually 5 days.
3.What payment methods are accepted for HN27C4096AG12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HN27C4096AG12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HN27C4096AG12?
HN27C4096AG12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HN27C4096AG12 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 HN27C4096AG12?
For technical support, including HN27C4096AG12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HN27C4096AG12 requirements.
6.How does Aetrix verify that HN27C4096AG12 is sourced from the original manufacturer or authorized distributors?
All HN27C4096AG12 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 HN27C4096AG12 meets industry standards.
7.What is the process for return or replacement of HN27C4096AG12?
All HN27C4096AG12 units undergo pre-shipment inspection (PSI). If there is an issue with HN27C4096AG12, 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 HN27C4096AG12 part is unused and in its original packaging.
Return procedure for HN27C4096AG12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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