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Infineon Technologies CY7C1049BL-17VC
- Part No.:
- CY7C1049BL-17VC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 36-BSOJ (0.400", 10.16mm Width)
- Datasheet:
-
CY7C1049BL-17VC.pdf
- Description:
- IC SRAM 4MBIT PARALLEL 36SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:1,517
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Product details
Overview
CY7C1049BL-17VC from Cypress Semiconductor is a 512K × 8 (4-Mbit) high-speed CMOS static RAM with 17 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 embedded controllers, industrial PLCs, and legacy telecom line cards requiring non-volatile SRAM hold during brownout.
For engineers reviewing the CY7C1049BL-17VC datasheet, CY7C1049BL-17VC pinout, CY7C1049BL-17VC application, or CY7C1049BL-17VC equivalent, key selection criteria include tAA = 17 ns read timing, ISB2 ≤ 0.5 mA CMOS standby current, VDR = 2.0V retention voltage, and SOJ-36 package compatibility with legacy board layouts.
Technical Context
The CY7C1049BL-17VC implements a full asynchronous SRAM architecture with independent address decoding for 524,288 × 8-bit storage, using three-state bidirectional I/O drivers and dual enable control (CE# and OE#) for seamless memory expansion. Its internal voltage regulator steps 5V down to 3.3V for core logic, enabling stable operation across supply variation.
Power management is handled via automatic CE#-driven transition into low-power retention mode (ISB2 = 0.5 mA max), with data preserved at VCC = 2.0V. Input thresholds meet TTL levels (VIH ≥ 2.2V, VIL ≤ 0.3V), and output drive complies with IOH = –4.0 mA / IOL = 8.0 mA specifications under worst-case conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 512K × 8 (4,194,304 bits), enabling byte-wide data bus interfacing without external demultiplexing |
| Access Time (tAA) | 17 ns max - defines minimum clock-to-data latency in synchronous systems or maximum bus cycle rate in asynchronous microprocessor interfaces |
| Supply Voltage (VCC) | 4.5V–5.5V - compatible with standard 5V TTL/CMOS logic rails and legacy industrial power domains |
| Standby Current (ISB2) | 0.5 mA max (CMOS inputs) - enables ultra-low-power retention in battery-backed applications such as real-time clock buffers |
| Data Retention Voltage | 2.0V - guarantees data integrity during brownout or controlled shutdown without external backup capacitors |
| Input Capacitance | 8 pF - limits loading on address/data buses, supporting reliable signal integrity up to 20 MHz bus toggling |
| Operating Temperature | 0°C to +70°C - qualified for commercial-grade embedded systems including point-of-sale terminals and instrumentation front-ends |
Pinout & Package
The CY7C1049BL-17VC is housed in a 36-pin SOJ (Small Outline J-lead) package, 400-mil wide, with center power/ground pinout configuration optimized for thermal dissipation and PCB layout symmetry.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus accepting 524,288 unique locations; A10 and A11 are NC per datasheet |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit tristatable I/O lines shared for read/write; high-impedance when CE# HIGH, OE# HIGH, or WE# LOW |
| CE# | Chip Enable (active LOW) | Primary device select; initiates automatic power-down when HIGH and all inputs at valid logic levels |
| OE# | Output Enable (active LOW) | Controls output driver enable only; does not affect internal power state or write functionality |
| WE# | Write Enable (active LOW) | Activates write path when CE# and WE# both LOW; latches data on rising edge of WE# or CE# |
| VCC | Power Supply | 5V supply input feeding internal 3.3V regulator; pins 18 and 33 are dedicated VCC connections |
| GND | Ground | Reference return for logic and I/O; pins 12 and 21 provide dual ground paths for noise reduction |
Key Features
| Feature | Design Value |
|---|---|
| 17 ns Access Time | Enables direct interface with 25 MHz Z80, 80C188, or 68EC000-based systems without wait states |
| 0.5 mA CMOS Standby Current | Reduces system-level quiescent power by >90% vs. standard TTL-SRAM variants during idle periods |
| 2.0V Data Retention | Eliminates need for external backup batteries or supercapacitors in short-duration power-loss scenarios |
| TTL-Compatible I/O | Direct connection to legacy 5V microcontrollers and FPGAs without level-shifting circuitry |
| SOJ-36 Pinout Compatibility | Drop-in replacement for CY7C1041, CY7C1021, and other 36-pin JEDEC-standard SRAMs in existing PCB footprints |
Applications
| Industrial PLC Memory Buffer | Legacy Telecom Line Card Cache |
|---|---|
Use Scenario: Stores configuration registers and real-time I/O status in programmable logic controllers operating in factory-floor environments with voltage fluctuations. IC Role / Device Role / Timing Role: Asynchronous byte-wide SRAM providing deterministic 17 ns read/write response to ladder-logic scan cycles. Use Value: 2.0V data retention preserves critical state during 100–500 ms brownouts common in industrial power distribution. | Use Scenario: Caches protocol translation tables and call setup metadata in T1/E1 framing IC interfaces on telecom shelf cards. IC Role / Device Role / Timing Role: Non-volatile buffer between serial framers and host processors, synchronized via CE#/OE# handshaking. Use Value: 0.5 mA standby current extends mean time between maintenance cycles in fanless, sealed chassis designs. |
| Point-of-Sale Terminal NVRAM | Medical Instrumentation Data Log |
Use Scenario: Holds transaction logs and tax tables in retail terminals powered by unregulated wall adapters prone to ripple and dropout. IC Role / Device Role / Timing Role: Byte-accessible SRAM with CE#-triggered retention mode activated during AC loss detection. Use Value: Eliminates external battery and associated leakage, corrosion, and RoHS compliance risks. | Use Scenario: Captures sensor calibration coefficients and last-known vital signs in portable ECG monitors during battery swap events. IC Role / Device Role / Timing Role: Low-leakage memory holding firmware-critical parameters accessible within 1 µs of power restoration. Use Value: 8 pF input capacitance ensures clean sampling of analog front-end reference voltages without added filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar asynchronous SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IS61LV5128AL-17TI | Same 512K×8 organization, 17 ns speed, but uses 3.3V-only supply (3.0–3.6V); no 2.0V retention | Requires separate 3.3V rail; unsuitable for brownout retention in 5V systems | Select only if system already has regulated 3.3V supply and retention is handled externally |
| CY7C1049B-17VC | Same pinout and timing, but higher ISB2 = 8 mA (vs. 0.5 mA) and no L-version low-power optimization | Lacks extended retention capability; consumes more power in standby | Use where cost is prioritized over power efficiency and retention is not required |
Compared with IS61LV5128AL-17TI and CY7C1049B-17VC, the CY7C1049BL-17VC uniquely delivers 2.0V data retention and 0.5 mA standby current in a drop-in 5V SOJ-36 footprint-making it the sole choice for legacy 5V systems needing robust brownout resilience without redesign.
Availability
CY7C1049BL-17VC is available at Aetrix Electronics and suitable for industrial PLCs, legacy telecom line cards, and medical instrumentation requiring stable component supply with long-term lifecycle support and consistent SOJ-36 packaging.
Supply support for CY7C1049BL-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, with design centers in California and global manufacturing partnerships.
The CY7C1049B series was developed for high-reliability, pin-compatible replacement of aging 5V SRAMs in industrial and telecom infrastructure, emphasizing backward compatibility, low-power retention, and JEDEC-standard SOJ packaging.
FAQ
What is the minimum VCC required to retain data in CY7C1049BL-17VC?
The CY7C1049BL-17VC guarantees data retention down to exactly 2.0V (VDR = 2.0V) with ICCDR ≤ 200 µA under commercial L conditions. Below 2.0V, data loss is not characterized and must be avoided. This specification is verified per datasheet page 6, Table "Data Retention Characteristics", and applies only when CE# is held HIGH and all inputs are at valid logic levels.
Can CY7C1049BL-17VC be used with a 3.3V microcontroller interface?
No - the CY7C1049BL-17VC requires a 4.5–5.5V VCC supply and features TTL-compatible inputs (VIH ≥ 2.2V, VIL ≤ 0.3V), but its outputs swing to 5V logic levels. Direct connection to 3.3V-only I/O ports risks damage or latch-up unless level-shifting circuitry (e.g., TXB0108 or discrete MOSFET translators) is implemented per Cypress Application Note AN1084.
How does the automatic power-down feature activate?
Automatic power-down activates when CE# is driven HIGH while all address and control inputs (A0–A18, OE#, WE#) remain at valid CMOS logic levels (≥ VCC – 0.3V or ≤ 0.3V). Under this condition, ISB2 drops to ≤ 0.5 mA. The feature does not require external sequencing - it is fully internal and occurs within tPD = 17 ns after CE# goes HIGH.
Are A10 and A11 pins functional or no-connect?
A10 and A11 are explicitly designated as No Connect (NC) pins per the "Pin Configuration" diagram on page 2 and the "Ordering Information" table on page 9 of datasheet 38-05169 Rev. *A. They must remain unconnected on PCB layout; routing traces or pulling them to any voltage violates the device's electrical specification and may cause undefined behavior or increased leakage.
CY7C1049BL-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
CY7C1049BL-17VC FAQ
1.How can I place an order for CY7C1049BL-17VC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C1049BL-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 CY7C1049BL-17VC reliable?
The price and inventory of CY7C1049BL-17VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C1049BL-17VC is usually 5 days.
3.What payment methods are accepted for CY7C1049BL-17VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C1049BL-17VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C1049BL-17VC?
CY7C1049BL-17VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C1049BL-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 CY7C1049BL-17VC?
For technical support, including CY7C1049BL-17VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C1049BL-17VC requirements.
6.How does Aetrix verify that CY7C1049BL-17VC is sourced from the original manufacturer or authorized distributors?
All CY7C1049BL-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 CY7C1049BL-17VC meets industry standards.
7.What is the process for return or replacement of CY7C1049BL-17VC?
All CY7C1049BL-17VC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C1049BL-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 CY7C1049BL-17VC part is unused and in its original packaging.
Return procedure for CY7C1049BL-17VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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