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Infineon Technologies CY7C1049D-10VXIT
- Part No.:
- CY7C1049D-10VXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 36-BSOJ (0.400", 10.16mm Width)
- Datasheet:
-
CY7C1049D-10VXIT.pdf
- Description:
- IC SRAM 4MBIT PARALLEL 36SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:4,890
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Product details
Overview
CY7C1049D-10VXIT from Cypress Semiconductor is a 4-Mbit (512 K × 8) high-speed CMOS static RAM with 10 ns access time, 90 mA active current, and 10 mA CMOS standby current. It features TTL-compatible I/O, automatic CE power-down, and 2.0 V data retention. Used in legacy industrial controllers and embedded systems requiring fast, reliable parallel memory interfacing with 5 V microprocessors.
For engineers reviewing the CY7C1049D-10VXIT datasheet, CY7C1049D-10VXIT pinout, CY7C1049D-10VXIT application, or CY7C1049D-10VXIT equivalent, key selection criteria include tAA ≤ 10 ns, ISB2 ≤ 10 mA, VCC = 4.5–5.5 V, CE/OE/WE control logic, and SOJ-36 package compatibility with board-level SRAM expansion.
Technical Context
The CY7C1049D-10VXIT implements a fully asynchronous parallel SRAM architecture with tri-state I/O drivers and dual enable control (CE and OE). Its address decoding supports 19-bit addressing (A0–A18), enabling full 512K-word access without external banking logic.
Power management relies on automatic CE-driven transition to low-power retention mode (ISB2 = 10 mA at VCC = 5.5 V), while data integrity is maintained down to 2.0 V. Input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) and output drive (VOH ≥ 2.4 V @ –4 mA) are strictly TTL-aligned - not CMOS-compatible.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4 Mbit (512 K × 8); supports byte-wide data bus without multiplexing or external latch |
| Access Time (tAA) | 10 ns; enables direct interface with 100 MHz bus cycles in legacy 80x86 and 68K-based systems |
| Active Current (ICC) | 90 mA at 10 ns; defines thermal budget for dense memory arrays in industrial backplanes |
| Standby Current (ISB2) | 10 mA under CMOS-input power-down; allows low-quiescent operation during processor sleep modes |
| Data Retention Voltage | 2.0 V minimum; permits battery-backed retention during brown-out or controlled shutdown |
| VCC Operating Range | 4.5 V to 5.5 V; matches standard TTL logic supply rails, excluding 3.3 V or mixed-voltage domains |
| Input Compatibility | TTL-only (VIH ≥ 2.0 V, VIL ≤ 0.8 V); incompatible with CMOS-level processors without level translation |
Pinout & Package
Package: 36-pin SOJ (400-mil width), center power/ground pinout (VCC and GND at pins 14 & 15, 23 & 24, 28 & 27).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit unidirectional address bus; supports full 512K-word linear addressing |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit tri-state I/O; high-impedance when CE HIGH, OE HIGH, or WE LOW |
| CE | Chip Enable (active LOW) | Primary device select; triggers automatic power-down when HIGH |
| OE | Output Enable (active LOW) | Controls read-data output gating; does not affect write or power state |
| WE | Write Enable (active LOW) | Initiates write cycle when CE also LOW; disables outputs during write |
| VCC | Supply Voltage | 4.5–5.5 V TTL rail; pins 14, 23, 28 provide distributed power delivery |
| GND | Ground Reference | Pins 15, 24, 27 ensure low-noise return path for high-speed switching |
Key Features
| Feature | Design Value |
|---|---|
| Pin- and function-compatible with CY7C1049B | Enables drop-in replacement in existing designs without PCB or firmware changes |
| Automatic CE power-down mode | Reduces standby current to 10 mA without external control logic or clock gating |
| TTL-compatible inputs/outputs | Eliminates need for level shifters when interfacing with 5 V microcontrollers and FPGAs |
| 2.0 V data retention | Supports nonvolatile backup using coin-cell batteries or supercapacitors during main power loss |
| Tri-state I/O with multiple disable conditions | Prevents bus contention during reset, sleep, or multi-chip memory expansion |
Applications
| Industrial PLC Memory Buffer | Legacy Microprocessor Cache Extension |
|---|---|
Use Scenario: Real-time I/O scanning and program execution in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Parallel SRAM used as fast scratchpad memory for ladder logic execution and register mapping. Use Value: 10 ns tAA ensures deterministic response within 100 µs scan cycles; 5.0 V tolerance matches industrial 5 V supply rails. | Use Scenario: Adding external RAM to Z80 or 8086-based single-board computers where on-chip memory is insufficient. IC Role / Device Role / Timing Role: Byte-wide memory expansion via ISA-compatible address/data bus with CE/OE/WE handshaking. Use Value: Pin-compatibility with CY7C1049B allows reuse of legacy PCB footprints; TTL I/O eliminates level-shifter BOM cost. |
| Automotive Engine Control Unit (ECU) Log Buffer | Medical Diagnostic Equipment Frame Store |
Use Scenario: Storing transient sensor logs and fault codes in engine control modules operating across –40 °C to +85 °C. IC Role / Device Role / Timing Role: Nonvolatile buffer retaining critical diagnostics during ignition-off periods via 2.0 V data retention. Use Value: ISB2 = 10 mA enables >72-hour battery-backed logging; industrial temp grade ensures reliability under hood conditions. | Use Scenario: Capturing and holding real-time ultrasound or ECG waveform frames before DSP processing. IC Role / Device Role / Timing Role: High-speed frame buffer interfaced directly to ADC/DAC peripherals via parallel bus. Use Value: 512 K × 8 capacity stores up to 512 KB of raw waveform data; tOHA = 3 ns prevents address hold violations during burst reads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parallel SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AS6C4008-10TIN | 3.3 V only, ISB = 1 µA, tAA = 10 ns, SOJ-32 (not pin-compatible) | Requires voltage translation and PCB redesign; suited for low-power portable systems | Select only if migrating to 3.3 V domain and redesigning layout |
| IS61LV5128-10MLI | 3.3 V core, 5 V tolerant I/O, ISB = 30 µA, tAA = 10 ns, TSOP-32 | Compatible with mixed 3.3/5 V buses but requires new footprint and decoupling | Choose for new designs needing lower standby power and modern packaging |
Compared with AS6C4008-10TIN and IS61LV5128-10MLI, the CY7C1049D-10VXIT uniquely delivers native 5 V TTL operation, SOJ-36 pinout, and proven industrial temperature reliability - making it irreplaceable in legacy 5 V systems without board rework.
Availability
CY7C1049D-10VXIT is available at Aetrix Electronics and suitable for industrial PLCs, legacy microprocessor systems, and automotive ECUs requiring stable component supply over extended product lifecycles.
Supply support for CY7C1049D-10VXIT 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 for industrial, automotive, and consumer applications.
The CY7C1049D belongs to Cypress's legacy parallel SRAM product line, designed specifically for plug-compatible upgrades and long-lifecycle support in 5 V TTL-based embedded systems.
FAQ
Is CY7C1049D-10VXIT compatible with 3.3 V microcontrollers?
No. The device requires 4.5–5.5 V VCC and has TTL input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V), but its outputs do not meet 3.3 V logic high minimums (VOH max = 3.4 V at VCC = 5.5 V, but VIH for 3.3 V receivers typically requires ≥ 2.0 V - marginal). Direct interface risks setup/hold violations and is not recommended without level translation.
What is the maximum clock frequency supported for burst read/write operations?
The CY7C1049D-10VXIT is asynchronous - it has no internal clock. Maximum effective throughput is determined by tRC = 10 ns, supporting up to 100 MHz random-access cycles. For sustained burst transfers, system timing must respect tAA, tOHA, and tHZOE (5 ns), limiting practical bandwidth to ~80 MB/s on an 8-bit bus.
Does this SRAM require external refresh circuitry?
No. As a static RAM, the CY7C1049D-10VXIT retains data indefinitely as long as VCC remains within specification and CE is asserted. No refresh cycles, timers, or external circuitry are needed - unlike DRAM - simplifying controller design and reducing firmware overhead.
Can CY7C1049D-10VXIT be used in place of CY7C1049B-10VXI?
Yes. The datasheet explicitly states pin- and function-compatibility. Both share identical pinout, timing (tAA = 10 ns), electrical specs (ICC = 90 mA, ISB2 = 10 mA), and SOJ-36 packaging. The 'D' revision includes minor process enhancements but maintains full backward compatibility for drop-in replacement.
CY7C1049D-10VXIT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 36-BSOJ (0.400", 10.16mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 10ns
- Access Time:
- 10 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 36-SOJ
CY7C1049D-10VXIT FAQ
1.How can I place an order for CY7C1049D-10VXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C1049D-10VXIT 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 CY7C1049D-10VXIT reliable?
The price and inventory of CY7C1049D-10VXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C1049D-10VXIT is usually 5 days.
3.What payment methods are accepted for CY7C1049D-10VXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C1049D-10VXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C1049D-10VXIT?
CY7C1049D-10VXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C1049D-10VXIT 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 CY7C1049D-10VXIT?
For technical support, including CY7C1049D-10VXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C1049D-10VXIT requirements.
6.How does Aetrix verify that CY7C1049D-10VXIT is sourced from the original manufacturer or authorized distributors?
All CY7C1049D-10VXIT 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 CY7C1049D-10VXIT meets industry standards.
7.What is the process for return or replacement of CY7C1049D-10VXIT?
All CY7C1049D-10VXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY7C1049D-10VXIT, 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 CY7C1049D-10VXIT part is unused and in its original packaging.
Return procedure for CY7C1049D-10VXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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