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Infineon Technologies CY7C1049B-15VC
- Part No.:
- CY7C1049B-15VC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 36-BSOJ (0.400", 10.16mm Width)
- Datasheet:
-
CY7C1049B-15VC.pdf
- Description:
- IC SRAM 4MBIT PARALLEL 36SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:2,932
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Product details
Overview
CY7C1049B-15VC from Cypress Semiconductor is a 512K × 8 (4-Mbit) high-speed CMOS static RAM with 15 ns 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 embedded controllers, industrial PLCs, and legacy telecom line cards requiring nonvolatile SRAM backup during brownout.
For engineers reviewing the CY7C1049B-15VC datasheet, CY7C1049B-15VC pinout, CY7C1049B-15VC application, or CY7C1049B-15VC equivalent, key selection criteria include tAA = 15 ns read timing, ISB2 ≤ 8 mA CMOS standby current (Commercial), VCC = 4.5–5.5V operation, and SOJ-36 package compatibility with legacy board layouts.
Technical Context
The CY7C1049B-15VC 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 voltage regulator steps 5V down to 3.3V for core logic, enabling stable operation despite VCC tolerance.
It supports three distinct read cycles (CE-controlled, OE-controlled, and combined) and three write cycles (CE-, WE-, or OE-assisted), with precise timing windows defined for tACE, tDOE, tSCE, and tSD. Data retention mode activates automatically when CE is deasserted and VCC ≥ 2.0V, drawing only 200 µA in Commercial L version.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 524,288 × 8 bits (4 Mbit); enables byte-wide data bus interfacing without external demux. |
| Access Time (tAA) | 15 ns max; guarantees valid data on I/O pins within 15 ns of stable address and CE/OE assertion. |
| Operating Supply Current (ICC) | 220 mA max at fMAX; defines worst-case power delivery requirement for 5V rail design. |
| CMOS Standby Current (ISB2) | 8 mA max (Commercial); sets low-power idle budget when CE is HIGH and inputs are at rail. |
| Data Retention Voltage | 2.0 V min; allows memory state preservation during brownout or controlled shutdown with minimal backup supply. |
| I/O Capacitance | 8 pF max per pin; constrains trace length and fanout in high-speed parallel bus routing. |
| Input Voltage Thresholds | VIH = 2.2 V min, VIL = 0.8 V max; ensures reliable TTL-level signal recognition without level-shifting. |
Pinout & Package
The CY7C1049B-15VC is housed in a 36-pin SOJ (Small Outline J-lead) package, 400-mil wide, with center power/ground pinout layout optimized for signal integrity and thermal dissipation in dense PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus; selects one of 524,288 locations; A0 is LSB, A18 is MSB. |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit tri-state I/O; driven during read, high-Z during write or deselect. |
| CE | Chip Enable (active LOW) | Primary device select; enables internal logic and initiates automatic power-down when HIGH. |
| OE | Output Enable (active LOW) | Controls output drivers only; does not affect internal state or power mode. |
| WE | Write Enable (active LOW) | Gates write operation; must be LOW with CE LOW to store data from I/O bus. |
| VCC | Power Supply | +4.5V to +5.5V; powers both I/O buffers and regulated core logic (3.3V internally). |
| GND | Ground Reference | Two dedicated GND pins (pins 12 & 24); reduce ground bounce in high-speed switching. |
Key Features
| Feature | Design Value |
|---|---|
| 15 ns Access Time | Enables direct interface with 66 MHz CPU buses without wait states in legacy x86 or Z80 systems. |
| Automatic CE Power-Down | Reduces ICC to ≤8 mA (ISB2) when deselected-no external control logic required. |
| 2.0V Data Retention | Maintains stored data with only 200 µA draw at 2.0V, supporting battery-backed hold during main power loss. |
| TTL-Compatible I/O | Eliminates need for level translators when interfacing with 5V microcontrollers and FPGAs. |
| SOJ-36 Pinout Stability | Center VCC/GND layout minimizes simultaneous switching noise and improves signal return path integrity. |
Applications
| Industrial PLC Memory Buffer | Legacy Telecom Line Card Cache |
|---|---|
Use Scenario: Stores real-time I/O mapping and configuration tables in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Asynchronous byte-wide SRAM buffer between ARM7-based controller and fieldbus interface ASIC. Use Value: 15 ns tAA ensures deterministic response to fast scan-cycle interrupts; ISB2 ≤ 8 mA reduces thermal load in sealed enclosures. | Use Scenario: Caches protocol translation tables and call setup context in T1/E1 framing ICs deployed in central office switches. IC Role / Device Role / Timing Role: Nonvolatile shadow RAM holding critical firmware parameters during hot-swap module replacement. Use Value: 2.0V data retention preserves configuration across 100 ms power gaps; SOJ-36 footprint matches legacy board repair requirements. |
| Embedded Controller Boot ROM Shadow | Medical Imaging Frame Buffer |
Use Scenario: Mirrors boot code from slower flash into fast SRAM for execution acceleration in diagnostic equipment microcontrollers. IC Role / Device Role / Timing Role: Executable memory extension with zero-wait-state access for Cortex-M3/M4 cores. Use Value: tRC = 15 ns aligns with 66 MHz bus timing; CE-controlled power-down cuts idle power by >95% vs. active mode. | Use Scenario: Holds intermediate pixel data during real-time ultrasound image reconstruction pipelines. IC Role / Device Role / Timing Role: Dual-port-accessible frame buffer segment synchronized to ADC sampling clock. Use Value: 8 pF I/O capacitance limits signal rise/fall times to <3 ns, preserving timing margin in 20+ MHz parallel video bus. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed asynchronous SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AS6C4008-15PCN | Same 512K×8 organization, 15 ns tAA, but uses 3.3V-only supply (3.0–3.6V); no 2.0V retention mode. | Requires separate 3.3V rail; unsuitable for brownout retention in 5V systems. | Select only if system already uses 3.3V logic and retention is handled externally. |
| IS61LV5128-15K | 5V-tolerant I/O, 15 ns tAA, but higher ISB2 (25 mA) and no integrated voltage regulator. | Higher standby current increases thermal load; lacks internal VCC regulation for core stability. | Prefer where board-level 3.3V regulation exists and retention is not required. |
Compared with AS6C4008-15PCN and IS61LV5128-15K, the CY7C1049B-15VC uniquely combines 5V operation, 2.0V data retention, and automatic CE power-down-making it irreplaceable in legacy 5V systems needing robust brownout resilience without redesign.
Availability
CY7C1049B-15VC is available at Aetrix Electronics and suitable for industrial PLCs, legacy telecom line cards, medical imaging subsystems, and embedded controller boot acceleration requiring stable component supply and long-term obsolescence support.
Supply support for CY7C1049B-15VC 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 specializing in memory, PSoC, and USB solutions, with deep expertise in high-reliability SRAM and mixed-signal ICs.
The CY7C1049B belongs to Cypress's legacy high-speed asynchronous SRAM product line, designed specifically for drop-in replacement of older 4-Mbit SRAMs in industrial and telecom infrastructure where timing predictability and 5V compatibility are mandatory.
FAQ
What is the minimum VCC required for reliable data retention?
The CY7C1049B-15VC guarantees data retention down to 2.0V on VCC, drawing only 200 µA in Commercial L version. Below 2.0V, data integrity is not assured-even with CE HIGH-and retention time becomes unpredictable. This 2.0V threshold is tested and specified under full temperature range (0°C to +70°C) with all inputs held at valid logic levels.
Does the device require an external power-down control signal?
No. The CY7C1049B-15VC implements fully automatic power-down when CE is HIGH-no external logic or timing signals needed. Internal circuitry detects CE deassertion and transitions core logic to low-current mode within tPD = 15 ns, reducing ICC to ≤8 mA (ISB2) while maintaining data.
Can this SRAM be used with a 3.3V microcontroller without level shifters?
No. Although the core logic runs at 3.3V internally, all I/O pins are TTL-compatible and require 5V signaling: VIH = 2.2V min, VOH = 2.4V min at IOH = –4 mA. Interfacing directly with 3.3V-only GPIO will cause marginal or failed reads; a 5V-tolerant buffer or level translator is required.
Is the SOJ-36 package lead-free and RoHS-compliant?
Per Cypress documentation (Rev. *A, Sept. 2002), the CY7C1049B-15VC was manufactured prior to RoHS enforcement and uses SnPb (tin-lead) solder finish. It is not RoHS-compliant. For new designs requiring compliance, consult Infineon's current-generation PSRAM or LPDDR alternatives with documented RoHS status.
CY7C1049B-15VC 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:
- 15ns
- Access Time:
- 15 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
CY7C1049B-15VC FAQ
1.How can I place an order for CY7C1049B-15VC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C1049B-15VC 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 CY7C1049B-15VC reliable?
The price and inventory of CY7C1049B-15VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C1049B-15VC is usually 5 days.
3.What payment methods are accepted for CY7C1049B-15VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C1049B-15VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C1049B-15VC?
CY7C1049B-15VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C1049B-15VC 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 CY7C1049B-15VC?
For technical support, including CY7C1049B-15VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C1049B-15VC requirements.
6.How does Aetrix verify that CY7C1049B-15VC is sourced from the original manufacturer or authorized distributors?
All CY7C1049B-15VC 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 CY7C1049B-15VC meets industry standards.
7.What is the process for return or replacement of CY7C1049B-15VC?
All CY7C1049B-15VC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C1049B-15VC, 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 CY7C1049B-15VC part is unused and in its original packaging.
Return procedure for CY7C1049B-15VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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