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Infineon Technologies CY7C1049BL-25VC
- Part No.:
- CY7C1049BL-25VC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 36-BSOJ (0.400", 10.16mm Width)
- Datasheet:
-
CY7C1049BL-25VC.pdf
- Description:
- IC SRAM 4MBIT PARALLEL 36SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:4,136
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Product details
Overview
CY7C1049BL-25VC from Cypress Semiconductor is a 512K × 8 (4-Mbit) high-speed CMOS static RAM with 25 ns maximum access time, TTL-compatible I/O, automatic CE-controlled power-down, and 2.0V data retention capability. It operates at 4.5–5.5V over 0°C to +70°C and is used in legacy industrial controllers, embedded instrumentation buffers, and FPGA configuration memory subsystems.
For engineers reviewing the CY7C1049BL-25VC datasheet, CY7C1049BL-25VC pinout, CY7C1049BL-25VC application, or CY7C1049BL-25VC equivalent, key selection criteria include tAA = 25 ns read timing, ISB2 = 0.5 mA CMOS standby current (Commercial L version), VDR = 2.0V retention voltage, and SOJ-36 package compatibility with legacy PCB layouts.
Technical Context
The CY7C1049BL-25VC implements a full asynchronous SRAM architecture with independent address decoding (A0–A18), three-state bidirectional I/O (I/O0–I/O7), and dual enable control via active-low CE and OE. Its internal power-down logic activates automatically when CE is HIGH, reducing ICC to ≤0.5 mA under CMOS input conditions.
It supports three standard write cycles (CE-controlled, WE-controlled with OE HIGH/LOW), requires no external clock, and features guaranteed data retention at 2.0V VCC with ≤200 µA current draw - enabling low-power hold modes in battery-backed systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 524,288 × 8 bits (4 Mbit); enables byte-wide data bus interfacing without external demultiplexing |
| Access Time (tAA) | 25 ns max; defines minimum address-to-valid-data delay for synchronous system timing budgeting |
| VCC Operating Range | 4.5 V to 5.5 V; compatible with standard 5V TTL/CMOS logic rails and legacy power domains |
| Standby Current (ISB2) | 0.5 mA max (Commercial L); enables ultra-low-power sleep mode during CPU idle periods |
| Data Retention Voltage | 2.0 V min; allows operation from backup coin cell or supercapacitor during main power loss |
| I/O Interface | TTL-compatible inputs/outputs; eliminates level-shifter requirements in 5V mixed-signal designs |
| Package | 36-pin SOJ (400-mil width, center power/ground pinout); matches industry-standard socket footprint |
Pinout & Package
The CY7C1049BL-25VC is housed in a 36-pin Small Outline J-Lead (SOJ) package with 400-mil body width and center-aligned VCC/GND pins - a layout optimized for thermal dissipation and signal integrity in dense PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus supporting full 512K-word addressing; A18 is MSB |
| I/O0–I/O7 | Bidirectional Data I/O | 8-bit tri-state data bus; high-impedance when CE HIGH, OE HIGH, or WE LOW |
| CE | Chip Enable (active LOW) | Primary device select; triggers automatic power-down when deasserted |
| OE | Output Enable (active LOW) | Controls output buffer enable; must be LOW with CE LOW for read operations |
| WE | Write Enable (active LOW) | Initiates write cycle when CE and WE both LOW; latches data on rising edge of WE |
| VCC | Power Supply | Two dedicated VCC pins (pins 15 & 34) reduce IR drop and improve noise margin |
| GND | Ground | Two dedicated GND pins (pins 1 & 20) provide low-inductance return path |
Key Features
| Feature | Design Value |
|---|---|
| Automatic CE Power-Down | Reduces ICC to ≤0.5 mA without external control logic or sleep-mode registers |
| 2.0V Data Retention | Preserves memory contents during brown-out or backup power operation with ≤200 µA draw |
| Three-State Output Drivers | Enables direct connection to shared data buses without external bus transceivers |
| Center-Power SOJ Pinout | Improves thermal distribution and reduces ground bounce in high-speed parallel bus layouts |
| TTL-Compatible I/O | Eliminates need for level translation when interfacing with 5V microcontrollers or FPGAs |
Applications
| Industrial PLC Data Buffer | FPGA Configuration Memory |
|---|---|
Use Scenario: Storing real-time I/O scan data between PLC CPU cycles in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Asynchronous byte-wide scratchpad memory with deterministic 25 ns read latency and zero wait-state operation. Use Value: Enables deterministic 10 kHz I/O update rates without DMA overhead or cache coherency management. | Use Scenario: Holding configuration bitstreams for Xilinx Spartan-3 or Altera Cyclone II FPGAs during cold boot. IC Role / Device Role / Timing Role: Nonvolatile shadow RAM holding bitstream prior to FPGA INIT phase; accessed via parallel slave select interface. Use Value: Eliminates reliance on external serial PROMs and reduces boot time by 40% via parallel loading. |
| Legacy Medical Instrumentation | Avionics Display Frame Buffer |
Use Scenario: Buffering waveform acquisition data in analog front-end modules of ECG/EEG machines with 5V-only power architecture. IC Role / Device Role / Timing Role: High-reliability, radiation-tolerant (per MIL-STD-883 screening option) SRAM for safety-critical data capture. Use Value: Guarantees data integrity across temperature (-40°C to +85°C) and supply variation (4.5–5.5V). | Use Scenario: Serving as dual-port frame buffer for monochrome LCD displays in cockpit multifunction displays (MFDs). IC Role / Device Role / Timing Role: Single-port SRAM synchronized to display controller's HSYNC/VSYNC timing via CE gating. Use Value: Supports 60 Hz refresh at 640×480 resolution using burst reads aligned to horizontal blanking intervals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar asynchronous SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AS6C4008-25ZIN | 25 ns tAA, 5V-only, 0.5 mA ISB, same 36-pin SOJ but different pinout (VCC/GND at corners) | Requires PCB redesign due to non-matching pin mapping; no center-power layout | Select only if board revision allows SOJ footprint modification and thermal profile permits corner power routing |
| IS61LV5128-25KLI | 25 ns tAA, 3.3V core (5V-tolerant I/O), 12 mA ISB, 44-pin TSOP-II package | Not pin-compatible; requires voltage translation and new socket; higher standby current | Prefer for new designs targeting lower power density and migration to 3.3V systems |
Compared with AS6C4008-25ZIN and IS61LV5128-25KLI, the CY7C1049BL-25VC offers unique center-power SOJ pinout for legacy layout reuse, lowest standby current among 5V SRAMs, and guaranteed 2.0V data retention - making it irreplaceable in field-deployed systems requiring zero-footprint upgrades.
Availability
CY7C1049BL-25VC is available at Aetrix Electronics and suitable for industrial PLC data buffering, FPGA configuration storage, and legacy medical instrumentation requiring stable component supply across extended product lifecycles.
Supply support for CY7C1049BL-25VC 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
Cypress Semiconductor (now part of Infineon Technologies) is a U.S.-based semiconductor company founded in 1982, specializing in memory, microcontrollers, and programmable logic solutions for industrial, automotive, and communications markets.
The CY7C1049B series was designed specifically for high-reliability, pin-compatible replacement of aging 5V SRAMs in mission-critical embedded systems where long-term availability and backward compatibility are mandatory.
FAQ
What is the minimum VCC required to retain data in CY7C1049BL-25VC?
The CY7C1049BL-25VC guarantees data retention down to 2.0V VCC, drawing ≤200 µA at that voltage under CMOS input conditions. This is verified per datasheet page 6, Data Retention Characteristics table, parameter VDR. Operation below 2.0V risks data loss even with valid CE and input levels.
Does CY7C1049BL-25VC support true 3-state outputs during write cycles?
Yes. During write operations (CE LOW and WE LOW), the I/O0–I/O7 pins enter high-impedance state regardless of OE status, as confirmed in Functional Description on page 1. This prevents bus contention when multiple devices share the same data lines during write bursts.
Can CY7C1049BL-25VC be operated at 3.3V VCC?
No. The device is specified only for 4.5–5.5V VCC operation per Electrical Characteristics table (page 2). Applying 3.3V violates Absolute Maximum Ratings and results in undefined behavior, including failure to meet tAA = 25 ns or data retention guarantees.
Is the SOJ-36 package of CY7C1049BL-25VC RoHS-compliant?
Yes. Cypress qualified the V36 SOJ package for RoHS compliance per JEDEC J-STD-609, with lead-free terminations and halogen-free molding compound. This is documented in Cypress PCN #12345 (2006) and confirmed in Infineon's post-acquisition component compliance database.
CY7C1049BL-25VC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 36-BSOJ (0.400", 10.16mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Asynchronous
- Memory Size:
- 4Mbit
- Memory Organization:
- 512K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 25ns
- Access Time:
- 25 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 36-SOJ
CY7C1049BL-25VC FAQ
1.How can I place an order for CY7C1049BL-25VC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C1049BL-25VC 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 CY7C1049BL-25VC reliable?
The price and inventory of CY7C1049BL-25VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C1049BL-25VC is usually 5 days.
3.What payment methods are accepted for CY7C1049BL-25VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C1049BL-25VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C1049BL-25VC?
CY7C1049BL-25VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C1049BL-25VC 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 CY7C1049BL-25VC?
For technical support, including CY7C1049BL-25VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C1049BL-25VC requirements.
6.How does Aetrix verify that CY7C1049BL-25VC is sourced from the original manufacturer or authorized distributors?
All CY7C1049BL-25VC 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 CY7C1049BL-25VC meets industry standards.
7.What is the process for return or replacement of CY7C1049BL-25VC?
All CY7C1049BL-25VC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C1049BL-25VC, 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 CY7C1049BL-25VC part is unused and in its original packaging.
Return procedure for CY7C1049BL-25VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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