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Infineon Technologies CY7C109D-10VXI
- Part No.:
- CY7C109D-10VXI
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 32-BSOJ (0.400", 10.16mm Width)
- Datasheet:
-
CY7C109D-10VXI.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 32SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:191
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Product details
Overview
CY7C109D-10VXI from Cypress Semiconductor is a 1-Mbit (128 K × 8) high-speed CMOS static RAM with 10 ns access time, TTL-compatible I/O, and dual chip enable (CE1 active LOW, CE2 active HIGH) for flexible memory expansion. It operates at 5 V ±0.5 V over –40 °C to +85 °C and supports automatic power-down when deselected.
For engineers reviewing the CY7C109D-10VXI datasheet, CY7C109D-10VXI pinout, CY7C109D-10VXI application, or CY7C109D-10VXI equivalent, key selection considerations include its 10 ns tAA timing, 80 mA ICC active current, 3 mA ISB2 standby current, 2.0 V data retention capability, and compatibility with legacy 5 V TTL microcontrollers and FPGAs.
Technical Context
The CY7C109D-10VXI implements a fully decoded 128 K × 8 SRAM array with tri-state I/O drivers, enabling seamless integration into bus-based systems. Its dual CE architecture allows hierarchical memory mapping-CE1 controls primary selection while CE2 provides polarity-flexible secondary gating.
It features automatic CMOS power-down (ISB2 = 3 mA) when CE1 is HIGH or CE2 is LOW, and retains data down to 2.0 V VCC. Input thresholds (VIH = 2.2 V min, VIL = 0.8 V max) and output drive (VOH = 2.4 V @ –4 mA, VOL = 0.4 V @ 8 mA) are strictly TTL-compliant-not CMOS-level compatible.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 128 K × 8 (1,048,576 bits), single-port asynchronous SRAM |
| Access Time (tAA) | 10 ns - guarantees valid data within 10 ns of stable address and CE/OE assertion |
| Operating Supply Current (ICC) | 80 mA at 100 MHz - defines worst-case dynamic power under full-speed read/write cycling |
| CMOS Standby Current (ISB2) | 3 mA - achieved only when CE1 > VCC–0.3 V or CE2 < 0.3 V with CMOS input biasing |
| Data Retention Voltage (VDR) | 2.0 V - minimum VCC sustaining stored data during low-power hold mode |
| Input/Output Compatibility | TTL-level only - VIH ≥ 2.2 V, VIL ≤ 0.8 V; not interoperable with 3.3 V or CMOS VIH ≥ 3.5 V logic |
| Package Type | 32-pin TSOP I (JEDEC MO-141AA), Pb-free, 0.4 mm pitch, 11.8 × 20.0 mm footprint |
Pinout & Package
Package: 32-pin Thin Small Outline Package (TSOP I), 400-mil body width, surface-mount, lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting 131,072 word locations (217) |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit tri-state data path; high-impedance when CE1 HIGH, CE2 LOW, OE HIGH, or WE LOW |
| CE1 | Chip Enable 1 | Active LOW primary selection signal; initiates access when LOW and CE2 HIGH |
| CE2 | Chip Enable 2 | Active HIGH secondary selection; must be HIGH with CE1 LOW for valid access |
| OE | Output Enable | Active LOW control for output drivers; disables outputs (high-Z) when HIGH |
| WE | Write Enable | Active LOW write strobe; latches data on I/O pins when CE1 LOW and CE2 HIGH |
| VCC | Power Supply | +5.0 V ±0.5 V supply; powers core logic and I/O buffers |
| GND | Ground Reference | Signal and power return plane; decoupling required per JEDEC TSOP layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Pin- and function-compatible with CY7C109B | Enables drop-in replacement in existing designs without PCB or firmware changes |
| Automatic power-down on deselect | Reduces system standby power by disabling internal circuitry when CE1 HIGH or CE2 LOW |
| TTL-compatible inputs/outputs | Ensures direct interfacing with 5 V microcontrollers (e.g., Intel 80C188, Motorola 68K) without level-shifting |
| 2.0 V data retention | Supports battery-backed hold mode in industrial controllers during brown-out or sleep states |
| Tri-state output drivers with fast Z-state transitions | tHZOE = 5 ns and tLZOE = 0 ns enable clean bus sharing in multi-SRAM or mixed-peripheral systems |
Applications
| Industrial PLC Memory Buffer | Legacy Microcontroller Data RAM |
|---|---|
|
Use Scenario: Real-time I/O scanning and program execution in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Primary 128 KB data RAM buffer interfaced directly to 80C186 CPU address/data bus. Use Value: 10 ns tAA ensures deterministic scan cycle timing; 2.0 V retention maintains state during 100 ms AC line dropout. |
Use Scenario: External RAM expansion for 8-bit/16-bit embedded controllers in test equipment and instrumentation. IC Role / Device Role / Timing Role: Asynchronous data store accessed via multiplexed AD0–AD15 bus with separate RD/WR control. Use Value: Dual CE (CE1/CE2) enables bank-select decoding across four 128 KB regions without external logic. |
| Automotive Engine Control Unit (ECU) Scratchpad | Avionics Display Frame Buffer |
|
Use Scenario: Temporary variable storage and calibration table caching in ASIL-B compliant engine management systems. IC Role / Device Role / Timing Role: Non-volatile scratchpad accessed during cold-start initialization before flash loading completes. Use Value: –40 °C to +85 °C operating range and 3 mA ISB2 support extended idle periods with minimal battery drain. |
Use Scenario: Pixel data buffering for monochrome LCD displays in cockpit multifunction displays (MFD). IC Role / Device Role / Timing Role: Dedicated display RAM mapped to video controller DMA channel with burst-read capability. Use Value: Tri-state outputs and fast tHZOE/tLZOE prevent bus contention during simultaneous CPU and display controller access. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IS61LV1024-10TQLI | 3.3 V core, LVCMOS I/O (VIH = 2.0 V min), 10 ns tAA, same 128 K × 8 organization | Requires level translation for 5 V TTL buses; unsuitable for direct CY7C109D-10VXI replacement without redesign | Select only if migrating to 3.3 V system architecture with LVCMOS host interface |
| CY7C109BV-10VXI | Same pinout and timing, but rated for –55 °C to +125 °C extended temperature range and higher ICC (100 mA) | Valid for military/aerospace use cases requiring wider thermal margin and higher drive strength | Choose when operating beyond industrial temperature range or driving longer trace loads |
Compared with IS61LV1024-10TQLI and CY7C109BV-10VXI, the CY7C109D-10VXI uniquely balances 5 V TTL compatibility, 10 ns speed, and industrial-grade reliability without over-specifying voltage or temperature-making it optimal for cost-sensitive, legacy 5 V embedded systems.
Availability
CY7C109D-10VXI is available at Aetrix Electronics and suitable for industrial PLCs, legacy microcontroller-based instrumentation, and automotive ECU designs requiring stable component supply, long-lifecycle support, and verified Pb-free TSOP I packaging.
Supply support for CY7C109D-10VXI 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) designs high-reliability memory and programmable solutions for industrial, automotive, and communications infrastructure.
The CY7C109D belongs to Cypress's legacy parallel SRAM product line, engineered specifically for pin-compatible upgrades of 5 V TTL-based systems requiring deterministic access timing and robust data retention.
FAQ
Is CY7C109D-10VXI compatible with 3.3 V microcontrollers?
No. The device requires 5 V ±0.5 V supply and has TTL-level I/O thresholds (VIH ≥ 2.2 V, VIL ≤ 0.8 V). Interfacing with 3.3 V logic requires bidirectional level shifters; direct connection risks undervoltage VIH violation and unreliable reads.
What is the maximum clock frequency supported for burst access?
The CY7C109D-10VXI is an asynchronous SRAM with no internal clock. Its maximum effective throughput is determined by tRC = 10 ns, yielding up to 100 MHz sustained random-access rate when CE and OE are held active and addresses change every 10 ns.
Does CY7C109D-10VXI support battery backup operation?
Yes. With VCC reduced to 2.0 V and CE1 HIGH or CE2 LOW, the device enters data retention mode drawing ≤3 mA. This allows operation from a coin-cell or supercapacitor during main power loss, preserving contents for indefinite duration at room temperature.
Can NC pins be left unconnected or tied to ground?
NC (No Connect) pins-such as Pin 18 on the TSOP I package-are not bonded to the die. They must remain floating; tying them to GND, VCC, or signals may cause mechanical stress or unintended coupling due to package parasitics per Cypress design guidelines.
CY7C109D-10VXI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 32-BSOJ (0.400", 10.16mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- 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:
- 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:
- 32-SOJ
CY7C109D-10VXI FAQ
1.How can I place an order for CY7C109D-10VXI through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C109D-10VXI 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 CY7C109D-10VXI reliable?
The price and inventory of CY7C109D-10VXI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C109D-10VXI is usually 5 days.
3.What payment methods are accepted for CY7C109D-10VXI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C109D-10VXI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C109D-10VXI?
CY7C109D-10VXI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C109D-10VXI 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 CY7C109D-10VXI?
For technical support, including CY7C109D-10VXI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C109D-10VXI requirements.
6.How does Aetrix verify that CY7C109D-10VXI is sourced from the original manufacturer or authorized distributors?
All CY7C109D-10VXI 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 CY7C109D-10VXI meets industry standards.
7.What is the process for return or replacement of CY7C109D-10VXI?
All CY7C109D-10VXI units undergo pre-shipment inspection (PSI). If there is an issue with CY7C109D-10VXI, 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 CY7C109D-10VXI part is unused and in its original packaging.
Return procedure for CY7C109D-10VXI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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