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Infineon Technologies CY7C109B-20VC
- Part No.:
- CY7C109B-20VC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 32-BSOJ (0.400", 10.16mm Width)
- Datasheet:
-
CY7C109B-20VC.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 32SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:3,817
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Product details
Overview
CY7C109B-20VC from Cypress Semiconductor is a 131,072 × 8-bit (128K × 8) high-speed CMOS static RAM with 20 ns maximum access time, 5 V ±10% supply, TTL-compatible I/O, and automatic CE-controlled power-down. It operates across commercial temperature range (0°C to +70°C) and supports memory expansion via dual chip enables (CE1 active-low, CE2 active-high) and three-state outputs - used in embedded controllers, industrial PLCs, and legacy data acquisition systems requiring non-volatile SRAM retention at 2.0 V.
For engineers reviewing the CY7C109B-20VC datasheet, CY7C109B-20VC pinout, CY7C109B-20VC application, or CY7C109B-20VC equivalent, key selection criteria include tAA ≤ 20 ns read timing, ISB2 ≤ 10 mA CMOS standby current, 2.0 V data retention capability, and SOJ-32 package compatibility with legacy board layouts.
Technical Context
This SRAM implements a synchronous, address-decoded 512 × 256 × 8 memory array with separate column/row decoders, sense amplifiers, and input buffers. Its dual CE architecture allows hierarchical memory mapping: CE1 (active-low) and CE2 (active-high) must both assert for selection, enabling banked addressing in multi-chip systems.
Three-state I/O drivers support bus sharing; output enable (OE) controls data validity independently of write enable (WE). Power-down is fully automatic - triggered by CE1 HIGH or CE2 LOW - reducing ICC to ≤10 mA without external control logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 131,072 words × 8 bits (128K × 8), directly maps to 17-bit address bus (A0–A16) |
| Max Access Time (tAA) | 20 ns - guarantees valid data on I/O pins within 20 ns after stable address assertion |
| VCC Supply Range | 5.0 V ±10% - compatible with standard TTL/CMOS logic rails; no external regulator needed |
| Standby Current (ISB2) | 10 mA max at CMOS input levels - enables low-power hold mode during system sleep |
| Data Retention Voltage | 2.0 V minimum - preserves stored data with VCC reduced to battery-backup level |
| Input/Output Compatibility | TTL-compatible VIH/VIL and VOH/VOL - interfaces directly with 5 V microcontrollers and FPGAs |
| Package Type | 32-pin SOJ (400-mil width) - industry-standard footprint for socketed or soldered legacy designs |
Pinout & Package
Package: 32-pin Small Outline J-Lead (SOJ), 400-mil body width, JEDEC MS-025 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus; A0 = LSB, A16 = MSB; decoded internally to select one of 131,072 locations |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit three-state I/O; high-impedance when CE1 HIGH, CE2 LOW, OE HIGH, or WE LOW |
| CE1 | Chip Enable 1 | Active-low primary chip select; device deselected if HIGH, enabling automatic power-down |
| CE2 | Chip Enable 2 | Active-high secondary chip select; both CE1 LOW and CE2 HIGH required for access |
| OE | Output Enable | Active-low control for output drivers; HIGH disables outputs regardless of CE state |
| WE | Write Enable | Active-low signal initiating write cycle; concurrent with CE1 LOW and CE2 HIGH |
| VCC | Power Supply | +5 V ±10% main supply; powers core logic and I/O buffers |
| GND | Ground Reference | Signal and power return; pin 16 in SOJ-32 layout |
Key Features
| Feature | Design Value |
|---|---|
| Dual Chip Enable Architecture | CE1 (active-low) and CE2 (active-high) enable hierarchical memory banking and seamless expansion beyond 128K |
| Automatic Power-Down | No external control needed - device enters low-current standby (≤10 mA) when CE1 deasserted or CE2 disabled |
| 2.0 V Data Retention | Maintains stored contents during brown-out or backup-battery operation without refresh or reinitialization |
| TTL-Compatible Interface | Direct connection to legacy 5 V microcontrollers (e.g., 8051, 68K) without level-shifting circuitry |
| Three-State Output Drivers | Enables shared data bus operation with multiple peripherals; OE and CE jointly manage bus contention |
Applications
| Industrial PLC Memory Buffer | Legacy Embedded Controller Cache |
|---|---|
|
Use Scenario: Real-time I/O scan buffer in programmable logic controllers where deterministic read/write latency is critical for cycle-based execution. IC Role / Device Role / Timing Role: Non-refreshing, low-latency scratchpad memory holding process image data between scan cycles. Use Value: 20 ns tAA ensures full 128K buffer access fits within sub-millisecond PLC scan windows without pipeline stalls. |
Use Scenario: Instruction/data cache in 1990s-era embedded systems (e.g., telecom line cards, test equipment) using 8/16-bit CPUs. IC Role / Device Role / Timing Role: Primary fast-access RAM mapped into CPU address space for zero-wait-state code execution. Use Value: TTL-compatible signaling eliminates interface glue logic; SOJ-32 footprint matches existing PCB tooling and sockets. |
| Medical Device Data Logger | Avionics System Configuration Store |
|
Use Scenario: Temporary storage of sensor readings prior to EEPROM transfer in battery-powered portable diagnostics units. IC Role / Device Role / Timing Role: Volatile buffer with 2.0 V retention - preserves last valid dataset during brief power loss. Use Value: ISB2 ≤ 10 mA minimizes quiescent drain on coin-cell backup, extending operational uptime between charges. |
Use Scenario: Storing flight-critical configuration tables (e.g., sensor calibration, trim settings) in certified avionics modules. IC Role / Device Role / Timing Role: High-reliability, radiation-tolerant SRAM selected for its proven field history and JEDEC SOJ packaging. Use Value: Dual CE architecture allows redundant enable paths per DO-254 safety requirements; no internal refresh failure modes. |
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 |
|---|---|---|---|
| AS6C1008-20TIN | Same 128K × 8 organization, 20 ns speed, but uses 3.3 V supply and LVTTL I/O; lower active current (55 mA vs. 75 mA) | Requires level translation in 5 V systems; unsuitable for direct drop-in replacement without voltage rail redesign | Select only if migrating to 3.3 V architecture and redesigning power delivery and interface logic |
| IS61LV1024-20TI | 128K × 8, 20 ns, 3.3 V core with 5 V tolerant inputs; higher standby current (25 µA vs. 10 mA) but no 2.0 V retention mode | Lacks data retention below 3.0 V; cannot serve battery-backup roles requiring 2.0 V hold | Prefer for new 3.3 V designs prioritizing ultra-low standby over retention; avoid where brown-out resilience is mandatory |
Compared with AS6C1008-20TIN and IS61LV1024-20TI, CY7C109B-20VC uniquely delivers 5 V TTL compatibility, 2.0 V data retention, and SOJ-32 pinout - making it irreplaceable in legacy 5 V systems requiring guaranteed data hold during power interruption.
Availability
CY7C109B-20VC is available at Aetrix Electronics and suitable for industrial PLCs, legacy embedded controller upgrades, and medical data loggers requiring stable component supply with long-lifecycle support and traceable sourcing.
Supply support for CY7C109B-20VC 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, PSoC, USB, and clock solutions for industrial and automotive markets.
CY7C109B belongs to Cypress's legacy parallel SRAM product line, designed specifically for 5 V embedded systems requiring pin-compatible, no-refresh, high-reliability memory with deterministic timing and robust power-down behavior.
FAQ
Is CY7C109B-20VC RoHS compliant?
CY7C109B-20VC was manufactured prior to RoHS Directive enforcement and contains leaded solder in its SOJ package. It is exempt under RoHS Annex III for legacy components in repair and maintenance of existing equipment. Aetrix provides full material declarations and exemption documentation upon request.
Can CY7C109B-20VC operate at 3.3 V?
No. The device requires 5.0 V ±10% (4.5 V to 5.5 V) for guaranteed operation. At 3.3 V, parameters including tAA, VOH, and data retention fail to meet specification; the part will not function reliably or may not power up.
What is the maximum clock frequency supported for read/write cycles?
This is an asynchronous SRAM with no internal clock. Maximum effective throughput is governed by tRC = 20 ns (read cycle time), supporting up to 50 MHz sustained random access - assuming address and control setup/hold times are met per datasheet timing diagrams.
Does CY7C109B-20VC support battery backup without external circuitry?
Yes. When VCC drops to 2.0 V and CE1 is held HIGH (or CE2 LOW), the device automatically enters data retention mode drawing ≤150 µA. No external switches, diodes, or supervisors are required - only a 2.0 V backup source connected to VCC.
CY7C109B-20VC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 32-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:
- 1Mbit
- Memory Organization:
- 128K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 20ns
- Access Time:
- 20 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-SOJ
CY7C109B-20VC FAQ
1.How can I place an order for CY7C109B-20VC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C109B-20VC 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 CY7C109B-20VC reliable?
The price and inventory of CY7C109B-20VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C109B-20VC is usually 5 days.
3.What payment methods are accepted for CY7C109B-20VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C109B-20VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C109B-20VC?
CY7C109B-20VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C109B-20VC 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 CY7C109B-20VC?
For technical support, including CY7C109B-20VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C109B-20VC requirements.
6.How does Aetrix verify that CY7C109B-20VC is sourced from the original manufacturer or authorized distributors?
All CY7C109B-20VC 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 CY7C109B-20VC meets industry standards.
7.What is the process for return or replacement of CY7C109B-20VC?
All CY7C109B-20VC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C109B-20VC, 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 CY7C109B-20VC part is unused and in its original packaging.
Return procedure for CY7C109B-20VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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