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Infineon Technologies CY7C1049B-17VC
- Part No.:
- CY7C1049B-17VC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 36-BSOJ (0.400", 10.16mm Width)
- Datasheet:
-
CY7C1049B-17VC.pdf
- Description:
- IC SRAM 4MBIT PARALLEL 36SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:4,641
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Product details
Overview
CY7C1049B-17VC from Cypress Semiconductor is a 512K × 8 (4 Mb) high-speed CMOS static RAM with 17 ns maximum access time, TTL-compatible I/O, and automatic CE-controlled power-down. It operates at 4.5–5.5 V over 0°C to +70°C, supports easy memory expansion via CE/OE/WE control, and delivers 2.75 mW max CMOS standby power in Commercial L version - used in legacy industrial controllers, telecom line cards, and FPGA configuration buffers.
For engineers reviewing the CY7C1049B-17VC datasheet, CY7C1049B-17VC pinout, CY7C1049B-17VC application, or CY7C1049B-17VC equivalent, key selection criteria include tAA = 17 ns read timing, ISB2 = 0.5 mA low-power retention mode, SOJ-36 package compatibility, and CE/OE/WE three-state bus interface behavior under mixed-voltage system constraints.
Technical Context
The CY7C1049B-17VC implements a full asynchronous SRAM architecture with independent address decoding (A0–A18), bidirectional 8-bit I/O bus (I/O0–I/O7), and three active-Low control signals: CE, OE, and WE. Its internal voltage regulator steps 5 V down to 3.3 V for core logic, enabling stable operation despite VCC tolerance.
Power management relies on CE-driven automatic power-down: when CE is HIGH, ICC drops to ISB2 = 0.5 mA (Com'l L), and data retention is guaranteed at VCC = 2.0 V with ICCDR ≤ 200 µA. Output impedance transitions are tightly specified - tHZOE = 7 ns and tLZCE = 3 ns - ensuring clean bus sharing in multi-SRAM systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 524,288 × 8 bits - supports byte-wide addressing without external data multiplexing |
| Access Time (tAA) | 17 ns max - defines minimum clock-to-data latency in synchronous bus interfaces |
| VCC Operating Range | 4.5 V to 5.5 V - compatible with standard 5 V TTL logic rails and legacy backplanes |
| Standby Current (ISB2) | 0.5 mA max (Commercial L) - enables low-power hold mode during processor sleep cycles |
| Data Retention Voltage | 2.0 V min - allows battery-backed retention using single-cell LiFePO₄ or coin cell |
| Output Drive Strength | IOH = –4.0 mA / IOL = 8.0 mA - meets TTL fan-out requirements without buffer amplification |
| Input Capacitance | 8 pF max - limits trace loading in high-density PCB layouts with >100 MHz address strobes |
Pinout & Package
The CY7C1049B-17VC is housed in a 36-pin SOJ (Small Outline J-Lead) package, 400-mil wide, with center power/ground pinout (VCC and GND pins symmetrically placed at Pins 18/19 and 35/36).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus supporting full 512K-word decode; no internal latching |
| I/O0–I/O7 | Bidirectional Data Bus | Three-state CMOS I/Os; high-impedance when CE HIGH, OE HIGH, or WE LOW |
| CE | Chip Enable (active LOW) | Primary device select; triggers automatic power-down and output disable on HIGH |
| OE | Output Enable (active LOW) | Controls output drivers only; does not affect internal power state |
| WE | Write Enable (active LOW) | Initiates write cycle when CE also LOW; disables outputs during write |
| VCC, GND | Power Supply | Dual VCC (Pins 18, 19) and dual GND (Pins 35, 36) reduce supply noise and improve signal integrity |
Key Features
| Feature | Design Value |
|---|---|
| 17 ns access time with 17 ns cycle time | Enables direct interfacing with 50 MHz microcontrollers without wait states |
| Automatic CE power-down | Reduces ICC from 195 mA active to 0.5 mA standby - cuts system power by >99% during idle |
| 2.0 V data retention | Permits use of ultra-low-quiescent backup supplies (e.g., TPS60403) in battery-critical designs |
| TTL-compatible inputs/outputs | Eliminates level-shifter requirements in mixed-logic 5 V systems with 3.3 V peripherals |
| SOJ-36 center-power pinout | Improves thermal dissipation and reduces ground bounce vs. corner-pin SOJ variants |
Applications
| Industrial PLC Memory Buffer | Telecom Line Card Frame Buffer |
|---|---|
Use Scenario: Storing real-time I/O status and ladder logic variables in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Asynchronous byte-wide scratchpad memory accessed by 8051 or ColdFire MCU via parallel bus with CE-strobed page selects. Use Value: 17 ns tAA ensures deterministic response within 200 ns scan cycles; ISB2 = 0.5 mA extends battery life to >10 years in unpowered backup mode. |
Use Scenario: Holding E1/T1 frame alignment words and jitter buffer metadata in carrier-grade access equipment. IC Role / Device Role / Timing Role: Dual-port accessible SRAM (via external arbiter) serving as shared descriptor table between DSP and line interface IC. Use Value: SOJ-36 package withstands reflow profiles up to 260°C; tHZCE = 7 ns guarantees clean bus release before next channel's time slot begins. |
| FPGA Configuration Storage | Legacy Medical Imaging Controller |
Use Scenario: Storing partial reconfiguration bitstreams for Xilinx Spartan-3 FPGAs in modular diagnostic subsystems. IC Role / Device Role / Timing Role: Nonvolatile shadow RAM holding compressed configuration pages loaded on demand via SPI-to-parallel bridge. Use Value: 512K × 8 capacity accommodates ≥3 full bitstreams; VCC = 4.5–5.5 V matches FPGA I/O bank supply range. |
Use Scenario: Caching DICOM header metadata and acquisition timing stamps in ultrasound front-end processors. IC Role / Device Role / Timing Role: Low-latency working memory for ARM7TDMI-based image pipeline, synchronized to 10 MHz pixel clock. Use Value: tDOE = 8 ns ensures valid data before next pixel sample; 8 pF input capacitance prevents skew across 19-bit address bus at 20 MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed parallel SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IS61LV5128AL-17TI | 3.3 V only supply; tAA = 17 ns; 32-pin SOJ; no 2.0 V retention | Requires level-shifting in 5 V systems; unsuitable for battery-retained backup | Select if migrating to 3.3 V-only design with tighter board space constraints |
| AS6C4008-17PCN | 5 V supply; tAA = 17 ns; 32-pin SOJ; ISB = 2 µA (lower than CY7C1049B-17VC's 0.5 mA) | Lower standby current but lacks internal voltage regulator - sensitive to VCC ripple | Prefer for ultra-low-power battery-operated devices where VCC regulation is externally managed |
Compared with IS61LV5128AL-17TI and AS6C4008-17PCN, the CY7C1049B-17VC uniquely combines 5 V tolerance, integrated 5 V→3.3 V regulation, and 2.0 V data retention - making it irreplaceable in legacy 5 V systems requiring robust backup operation without redesigning power architecture.
Availability
CY7C1049B-17VC is available at Aetrix Electronics and suitable for industrial PLCs, telecom line cards, and legacy medical imaging controllers requiring stable component supply and long-term obsolescence support.
Supply support for CY7C1049B-17VC 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 and communications markets.
The CY7C1049B belongs to Cypress's legacy parallel SRAM product line, designed specifically for drop-in replacement of obsolete 28-pin and 32-pin HM628128/6116-style memories in 5 V systems with strict timing and power constraints.
FAQ
Is CY7C1049B-17VC pin-compatible with CY7C1049B-15VC?
Yes - both share identical SOJ-36 pinout, address/data/control signal mapping, and electrical interface. The only difference is timing: tAA/tRC is 15 ns for -15VC versus 17 ns for -17VC. Systems designed for -15VC will operate reliably with -17VC, though maximum bus frequency must be reduced from ~66 MHz to ~58 MHz.
Does CY7C1049B-17VC require an external voltage regulator?
No - it integrates an internal voltage regulator that converts 5 V VCC to 3.3 V for core logic. This eliminates need for external regulators or LDOs, simplifies layout, and improves immunity to VCC ripple. However, VCC must remain within 4.5–5.5 V; operation outside this range may cause data corruption or latch-up.
Can CY7C1049B-17VC retain data at 2.0 V while powered only by a backup battery?
Yes - its data retention specification guarantees reliable storage at VCC = 2.0 V with ICCDR ≤ 200 µA (Commercial L grade). This allows direct connection to a single CR2032 (3 V) or LiFePO₄ cell (3.2 V nominal) through a 1.2 V LDO or resistor divider, enabling >10-year retention in unpowered systems.
What is the meaning of "L" suffix in CY7C1049BL-17VC?
The "L" denotes the low-power Commercial grade variant, characterized by ISB2 = 0.5 mA max (vs. 8 mA for standard Commercial), achieved via optimized CMOS process and deeper sleep transistor thresholds. It retains identical timing, voltage, and packaging - only standby current differs - making it ideal for battery-buffered applications.
CY7C1049B-17VC 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:
- 17ns
- Access Time:
- 17 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-17VC FAQ
1.How can I place an order for CY7C1049B-17VC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C1049B-17VC 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-17VC reliable?
The price and inventory of CY7C1049B-17VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C1049B-17VC is usually 5 days.
3.What payment methods are accepted for CY7C1049B-17VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C1049B-17VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C1049B-17VC?
CY7C1049B-17VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C1049B-17VC 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-17VC?
For technical support, including CY7C1049B-17VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C1049B-17VC requirements.
6.How does Aetrix verify that CY7C1049B-17VC is sourced from the original manufacturer or authorized distributors?
All CY7C1049B-17VC 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-17VC meets industry standards.
7.What is the process for return or replacement of CY7C1049B-17VC?
All CY7C1049B-17VC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C1049B-17VC, 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-17VC part is unused and in its original packaging.
Return procedure for CY7C1049B-17VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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