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Infineon Technologies CY7C109D-10VXIT
- Part No.:
- CY7C109D-10VXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 32-BSOJ (0.400", 10.16mm Width)
- Datasheet:
-
CY7C109D-10VXIT.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 32SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:1,813
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Product details
Overview
CY7C109D-10VXIT 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-10VXIT datasheet, CY7C109D-10VXIT pinout, CY7C109D-10VXIT application, or CY7C109D-10VXIT equivalent, key selection criteria include tAA = 10 ns read timing, ISB2 = 3 mA CMOS standby current, 2.0 V data retention capability, and compatibility with legacy 5 V TTL microprocessors and controllers requiring robust parallel SRAM interfacing.
Technical Context
The CY7C109D-10VXIT implements a 131,072 × 8-bit asynchronous SRAM array with tri-state bidirectional I/O drivers and independent control logic for CE1, CE2, OE, and WE. Its dual CE architecture enables seamless bank selection in multi-chip memory systems without external decoding logic.
It features automatic power-down when CE1 is HIGH or CE2 is LOW, reducing ICC to 3 mA (ISB2), and guarantees data retention down to 2.0 V VCC while maintaining full functionality across industrial temperature range (–40 °C to +85 °C) at 5 V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| tAA | 10 ns - maximum address-to-data valid delay; ensures compatibility with 100 MHz bus timing budgets |
| ICC (active) | 80 mA - typical operating current at 10 ns access; defines power budget for sustained read/write bursts |
| ISB2 (standby) | 3 mA - CMOS-mode standby current with CE inactive; enables low-power hold during processor sleep |
| VDR | 2.0 V - minimum VCC for data retention; supports battery-backed operation during main supply loss |
| VOH / VOL | 2.4 V / 0.4 V - TTL-compatible output levels; interfaces directly with 5 V microcontrollers without level shifters |
| Capacitance | 8 pF input/output - low pin capacitance minimizes signal integrity degradation on high-speed parallel buses |
| Package | 32-pin TSOP I - surface-mount package with 0.5 mm pitch; optimized for high-density PCB layouts |
Pinout & Package
Package: 32-pin TSOP I (Thin Small Outline Package, Type I), 0.5 mm pitch, 12.0 × 20.0 mm body size, Pb-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting 131,072-word addressing; A0 LSB, A16 MSB |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit tri-state I/O lines; high-impedance when CE1 HIGH, CE2 LOW, or OE HIGH |
| CE1 | Chip Enable 1 | Active LOW enable; primary selection signal; must be LOW with CE2 HIGH for read/write access |
| CE2 | Chip Enable 2 | Active HIGH enable; used with CE1 for hierarchical memory banking and decode simplification |
| OE | Output Enable | Active LOW; controls output driver enable; HIGH places I/O pins in high-Z state regardless of CE state |
| WE | Write Enable | Active LOW; initiates write cycle when CE1 LOW and CE2 HIGH; disables outputs during write |
| VCC | Power Supply | +5.0 V ±0.5 V supply; powers core logic and I/O buffers; decoupling required per datasheet layout guidelines |
| GND | Ground | Reference return path for all signals and power; requires low-inductance connection to minimize noise |
Key Features
| Feature | Design Value |
|---|---|
| Dual Chip Enable (CE1/CE2) | Enables direct connection to 16-bit or 32-bit processors with bank-select logic, eliminating external address decoder ICs |
| Automatic Power-Down | Reduces ICC to 3 mA (ISB2) when deselected-no external control needed for low-power retention mode |
| TTL-Compatible I/O | Guarantees VOH ≥ 2.4 V and VOL ≤ 0.4 V at specified loads-interoperable with legacy 5 V microcontrollers (e.g., 8051, 68K, Z80) |
| 2.0 V Data Retention | Maintains stored data during brown-out or backup-battery operation without refresh or external circuitry |
| High-Speed 10 ns Access | Supports CPU bus cycles up to 100 MHz; meets timing margins for synchronous burst reads in embedded controllers |
Applications
| Industrial PLC Memory Buffer | Legacy Microcontroller Data RAM |
|---|---|
|
Use Scenario: Real-time I/O scanning and program execution in programmable logic controllers using 8051 or 68HC11 derivatives. IC Role / Device Role / Timing Role: Primary data RAM providing zero-wait-state access for stack, variables, and temporary buffers. Use Value: 10 ns tAA eliminates wait states; TTL I/O eliminates level-shifter components; 3 mA ISB2 extends battery life during power-fail hold. |
Use Scenario: External RAM expansion for 8-bit microcontrollers with limited on-chip memory (e.g., AT89C51ED2, MC68HC12). IC Role / Device Role / Timing Role: Asynchronous parallel memory mapped at fixed address space; accessed via MOVX or similar instructions. Use Value: Pin- and function-compatible with CY7C109B; drop-in upgrade path; 2.0 V retention maintains register state during brown-out recovery. |
| Communications Protocol Stack Buffer | Medical Device Data Logging |
|
Use Scenario: Packet buffering and protocol translation in serial-to-Ethernet gateways using ARM7TDMI-based SoCs. IC Role / Device Role / Timing Role: Shared memory between host processor and communication coprocessor; accessed via parallel bus with CE1/CE2 bank switching. Use Value: Dual CE allows independent access arbitration; 8 pF pin capacitance preserves signal integrity on 10 MHz bus traces. |
Use Scenario: Temporary waveform storage in portable ECG monitors before SD card transfer or wireless upload. IC Role / Device Role / Timing Role: High-reliability volatile buffer holding raw analog samples prior to compression and transmission. Use Value: Industrial temp range (–40 °C to +85 °C) ensures operation in clinical environments; Pb-free TSOP I supports medical RoHS compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parallel SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AS6C1008-10TIN | 128 K × 8, 10 ns, 5 V, but CMOS-level I/O (VIH = 3.5 V min); no CE2 pin; single CE only | Requires level-shifting for legacy TTL processors; lacks dual-CE flexibility for multi-bank systems | Select only if interfacing with modern 5 V CMOS controllers and board space permits redesign of CE logic |
| IS61LV102410AL-10TLI | 128 K × 8, 10 ns, 3.3 V core; LVTTL I/O; supports 5 V tolerant inputs; no 2.0 V retention | Not compatible with 5 V-only systems; requires voltage translation or regulator change; no battery-retention mode | Prefer for new 3.3 V designs where lower active power (ICC = 45 mA) and smaller footprint outweigh retention needs |
Compared with AS6C1008-10TIN and IS61LV102410AL-10TLI, CY7C109D-10VXIT uniquely delivers TTL compatibility, dual CE control, and 2.0 V data retention in a single 5 V device-critical for legacy industrial upgrades and battery-backed systems where interface simplicity and reliability are non-negotiable.
Availability
CY7C109D-10VXIT is available at Aetrix Electronics and suitable for industrial PLC memory buffers, legacy microcontroller data RAM expansion, and medical device data logging requiring stable component supply, long-lifecycle support, and Pb-free compliance.
Supply support for CY7C109D-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, microcontrollers, and connectivity solutions for industrial, automotive, and consumer applications.
CY7C109D belongs to Cypress's legacy parallel SRAM product line, designed specifically for drop-in replacement of aging NMOS and early CMOS SRAMs in 5 V TTL-based embedded systems requiring high reliability and long-term availability.
FAQ
Is CY7C109D-10VXIT pin-compatible with CY7C109B?
Yes. The CY7C109D-10VXIT is pin- and function-compatible with CY7C109B per Cypress datasheet Rev. *J. Identical pinout, address/data mapping, and control signal behavior allow direct replacement without PCB modification. Key improvements include lower ISB2 (3 mA vs. 5 mA) and enhanced data retention at 2.0 V.
Can CY7C109D-10VXIT operate with 3.3 V supply?
No. The device is specified only for 5 V ±0.5 V operation (VCC = 4.5 V to 5.5 V). Applying 3.3 V violates Absolute Maximum Ratings and will result in undefined behavior, including failure to retain data or meet tAA timing. It is not 3.3 V tolerant.
What is the meaning of "NC" on pin 18 in the TSOP I package?
Pin 18 is marked NC (No Connect) and is not bonded to the die. It must remain unconnected on the PCB-neither tied to VCC, GND, nor any signal. Routing traces or placing vias on this pad may cause mechanical stress or unintended coupling, violating Cypress's recommended layout practices.
Does CY7C109D-10VXIT support byte-wide writes?
No. The device has eight bidirectional I/O lines (I/O0–I/O7) but no individual byte-write enable pins. All eight bits are written simultaneously during a single write cycle. To update a single byte, software must read-modify-write the full 8-bit word, as there is no hardware masking capability.
CY7C109D-10VXIT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 32-BSOJ (0.400", 10.16mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-10VXIT FAQ
1.How can I place an order for CY7C109D-10VXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C109D-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 CY7C109D-10VXIT reliable?
The price and inventory of CY7C109D-10VXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C109D-10VXIT is usually 5 days.
3.What payment methods are accepted for CY7C109D-10VXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C109D-10VXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C109D-10VXIT?
CY7C109D-10VXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C109D-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 CY7C109D-10VXIT?
For technical support, including CY7C109D-10VXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C109D-10VXIT requirements.
6.How does Aetrix verify that CY7C109D-10VXIT is sourced from the original manufacturer or authorized distributors?
All CY7C109D-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 CY7C109D-10VXIT meets industry standards.
7.What is the process for return or replacement of CY7C109D-10VXIT?
All CY7C109D-10VXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY7C109D-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 CY7C109D-10VXIT part is unused and in its original packaging.
Return procedure for CY7C109D-10VXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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