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Renesas HN27C4001G15
- Part No.:
- HN27C4001G15
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 32-CDIP (0.600", 15.24mm) Window
- Datasheet:
-
HN27C4001G15.pdf
- Description:
- IC EPROM 4MBIT PARALLEL 32CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:962
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Product details
Overview
HN27C4001G15 from Hitachi is a 4-Mbit (524,288-word × 8-bit) ultraviolet-erasable and electrically programmable ROM designed for nonvolatile program storage in legacy microcomputer systems. It features 150 ns maximum access time, TTL-compatible I/O, +12.5 V programming voltage, and operates on 5 V supply in read mode - enabling direct replacement of mask ROMs in embedded control and instrumentation applications.
For engineers reviewing the HN27C4001G15 datasheet, HN27C4001G15 pinout, HN27C4001G15 application, or HN27C4001G15 equivalent, key selection criteria include UV-erasability for reprogrammability, page programming capability with 3.5 sec minimum cycle time, JEDEC-standard 32-pin CERDIP package, and compatibility with 5 V ±10% logic systems requiring stable boot code retention.
Technical Context
The HN27C4001G15 implements a 19-bit address bus (A0–A18) supporting 524,288 × 8-bit memory mapping, with separate CE and OE controls enabling standard ROM timing behavior. Its architecture includes high-threshold inverters for reliable page latching and supports three distinct programming modes: word, page, and optional page+verify - all requiring precise VPP = +12.5 V ±0.3 V and VCC = 6.25 V ±0.25 V sequencing.
During read operation, it delivers TTL-compatible outputs (VOH ≥ 2.4 V, VOL ≤ 0.45 V) with 150 ns tACC and 70 ns tOE, while standby current is limited to 20 µA typical. Erasure requires 253.7 nm UV light at ≥15 W·s/cm² dose, resetting all bits to "1" - a process verified by device identifier mode (manufacturer code 07h, device code 20h).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory capacity | 524,288 words × 8 bits = 4 Mbit nonvolatile storage |
| Access time (max) | 150 ns - determines maximum clock rate for CPU interface in wait-state-free operation |
| Programming voltage | +12.5 V DC - required for reliable Fowler-Nordheim tunneling during page/word programming |
| Supply voltage (read) | 5 V ±10% - compatible with standard TTL/CMOS logic rails without level shifting |
| Standby current (typ) | 20 µA - enables low-power retention in battery-backed or intermittent-use systems |
| UV erasure dose | ≥15 W·s/cm² at 253.7 nm - defines minimum exposure time under commercial UV erasers |
| Package | DG-32A: 600 mil 32-pin CERDIP - hermetic ceramic package rated for industrial temperature range (0°C to +70°C) |
Pinout & Package
DG-32A is a 600 mil, 32-pin dual-in-line ceramic package with hermetic seal and gold-plated leads. Dimensions: 41.91 mm × 17.00 mm × 7.00 mm (L×W×H), lead pitch 2.54 mm, body width 15.51 mm max.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address inputs | 19-bit address bus decoding 524,288 locations; A9 used as high-voltage select in identifier mode |
| I/O0–I/O7 | Bidirectional data bus | TTL-compatible 8-bit parallel interface; high-impedance when CE or OE inactive |
| CE (22) | Chip enable | Active-low global enable; must be VIH for standby, VIL for active read/program cycles |
| OE (24) | Output enable | Active-low output gating; controls data bus drive during read; VH (12.0 V) enters page latch mode |
| VPP (1) | Programming power | +12.5 V input for programming; must be applied after VCC and removed before VCC per reliability rules |
| VCC (32) | Power supply | 5 V for read mode; 6.25 V for programming - strict sequencing prevents oxide stress |
| VSS (16) | Ground | Reference return path for all signals and supplies; decoupling critical near VCC/VPP pins |
Key Features
| Feature | Design Value |
|---|---|
| Page programming mode | Reduces total programming time to 3.5 sec min via 8-byte parallel latch and verify - avoids iterative byte-by-byte writes |
| Device identifier mode | Reads manufacturer code (07h) and device code (20h) using A9 = 12.0 V - enables auto-algorithm selection in universal programmers |
| TTL-compatible I/O | Supports direct interfacing with 5 V microprocessors (e.g., Z80, 8085, 68000) without bus transceivers or level shifters |
| Low standby power | 20 µA typical ICC in CE = VIH state - extends battery life in portable diagnostic or test equipment |
| UV erasability | Full array reset to "1"s using standard 253.7 nm UV lamps - allows field reprogramming of firmware in deployed systems |
Applications
| Industrial Control Firmware Storage | Legacy Microcomputer Boot ROM |
|---|---|
Use Scenario: Storing fixed ladder logic and I/O configuration in PLC modules requiring field-upgradable firmware. IC Role / Device Role / Timing Role: Nonvolatile boot code ROM providing immediate instruction fetch upon power-up with no initialization delay. Use Value: UV erasability enables firmware updates without PCB replacement; 150 ns access supports 6 MHz Z80-based controllers without wait states. |
Use Scenario: Providing BIOS and peripheral drivers for vintage 8-bit/16-bit development systems (e.g., S-100 bus computers). IC Role / Device Role / Timing Role: Primary program memory mapped at 0x0000–0x3FFFF, accessed via standard address/data bus with CE/OE handshaking. Use Value: Pin- and timing-compatible with 27C4001 mask ROMs, allowing drop-in upgrade to reprogrammable solution. |
| Test Equipment Calibration Data | Embedded Instrumentation Lookup Tables |
Use Scenario: Holding factory-calibrated ADC/DAC coefficients and sensor linearization tables in bench multimeters and oscilloscopes. IC Role / Device Role / Timing Role: Read-only data repository accessed during instrument startup and self-test sequences. Use Value: Hermetic CERDIP package ensures long-term data integrity (>10 years) under thermal cycling and humidity exposure. |
Use Scenario: Storing waveform synthesis tables and FFT coefficient sets in digital signal analyzers and spectrum analyzers. IC Role / Device Role / Timing Role: High-speed lookup memory delivering 8-bit samples to DACs with deterministic 150 ns latency. Use Value: Page programming allows rapid field updates of calibration curves without full device reprogramming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM27C4001-15DC | Same 4-Mbit capacity, 150 ns access, but uses 5 V-only programming (no VPP pin); requires external charge pump | Eliminates need for +12.5 V supply but increases board complexity with pump circuitry | Preferred where system-level voltage generation is constrained but UV erasure is still required |
| MX27C4001PC-15 | Identical pinout and AC specs, but lower programming voltage (12.0 V ±0.2 V); higher typical standby current (50 µA) | Slightly reduced programming margin; less suitable for high-reliability military-grade reprogramming | Cost-effective alternative when full Hitachi-spec VPP tolerance is not required |
Compared with HN27C4001G15, AM27C4001-15DC removes the VPP dependency at the cost of added external circuitry, while MX27C4001PC-15 trades tighter VPP tolerance for lower unit cost - making HN27C4001G15 optimal for designs prioritizing guaranteed programming robustness and long-term data retention in industrial environments.
Availability
HN27C4001G15 is available at Aetrix Electronics and suitable for industrial control firmware storage, legacy microcomputer boot ROMs, test equipment calibration data, and embedded instrumentation lookup tables requiring stable component supply across extended production lifecycles.
Supply support for HN27C4001G15 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 part of Renesas Electronics Corporation) was a Japanese multinational conglomerate specializing in semiconductor memory, microcontrollers, and industrial electronics until its semiconductor division merged into Renesas in 2003.
The HN27C4001G Series was developed as a high-reliability, UV-erasable EPROM family targeting mission-critical embedded systems requiring field-upgradable firmware with guaranteed 10+ year data retention and repeatable programming endurance.
FAQ
What is the programming voltage requirement for HN27C4001G15?
The HN27C4001G15 requires a precisely regulated +12.5 V ±0.3 V DC programming voltage (VPP) applied to Pin 1 during all programming modes. This voltage must be applied after VCC reaches 6.25 V ±0.25 V and removed before VCC - violating this sequence risks oxide damage. The HN27C4001G15 does not support 5 V-only programming.
Can HN27C4001G15 be used as a direct replacement for mask ROMs in existing designs?
Yes, the HN27C4001G15 is pin-compatible and timing-compatible with industry-standard 27C4001 mask ROMs. Its 32-pin DG-32A package, TTL-compatible I/O levels, and identical address/data bus structure allow drop-in replacement without PCB modification - provided the system can supply +12.5 V for programming and accommodate UV erasure for reprogramming.
How long does UV erasure take for HN27C4001G15?
HN27C4001G15 requires a minimum UV dose of 15 W·s/cm² at 253.7 nm wavelength for full erasure. Using a commercial EPROM eraser rated at 12 mW/cm², this translates to approximately 21 minutes of exposure. Erasure time scales inversely with intensity - always verify post-erase verification with a programmer before reprogramming the HN27C4001G15.
What is the purpose of the device identifier mode in HN27C4001G15?
The device identifier mode in HN27C4001G15 allows automatic detection of manufacturer (code 07h) and device type (code 20h) by applying 12.0 V ±0.5 V to A9 while holding CE and OE low. This feature enables universal programmers to select the correct algorithm and voltage profiles - ensuring reliable programming of the HN27C4001G15 without manual configuration.
Does HN27C4001G15 support both page and byte programming?
Yes, the HN27C4001G15 supports three programming methods: standard word programming, high-speed page programming (8 bytes per cycle), and optional page+verify mode that interleaves latching and verification to reduce total time on slow programmers. All modes require VPP = +12.5 V and use identical CE/OE timing constraints defined in the HN27C4001G15 datasheet.
HN27C4001G15 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 32-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:
- 512K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- -
- Access Time:
- 150 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 32-CDIP
HN27C4001G15 FAQ
1.How can I place an order for HN27C4001G15 through Aetrix?
Please submit a Request for Quotation (RFQ) for HN27C4001G15 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 HN27C4001G15 reliable?
The price and inventory of HN27C4001G15 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HN27C4001G15 is usually 5 days.
3.What payment methods are accepted for HN27C4001G15?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HN27C4001G15 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HN27C4001G15?
HN27C4001G15 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HN27C4001G15 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 HN27C4001G15?
For technical support, including HN27C4001G15 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HN27C4001G15 requirements.
6.How does Aetrix verify that HN27C4001G15 is sourced from the original manufacturer or authorized distributors?
All HN27C4001G15 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 HN27C4001G15 meets industry standards.
7.What is the process for return or replacement of HN27C4001G15?
All HN27C4001G15 units undergo pre-shipment inspection (PSI). If there is an issue with HN27C4001G15, 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 HN27C4001G15 part is unused and in its original packaging.
Return procedure for HN27C4001G15:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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