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Infineon Technologies CY7C109D-10ZXIT
- Part No.:
- CY7C109D-10ZXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
CY7C109D-10ZXIT.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 32TSOP I
- Quantity:
- Payment:
- Shipping:
Inventory:2,980
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Product details
Overview
CY7C109D-10ZXIT from Cypress Semiconductor is a 1-Mbit (128 K × 8) high-speed CMOS static RAM with 10 ns access time, 5 V supply operation, TTL-compatible I/O, and dual chip enable (CE1 active LOW, CE2 active HIGH) for flexible memory expansion in embedded control and data buffering systems.
For engineers reviewing the CY7C109D-10ZXIT datasheet, CY7C109D-10ZXIT pinout, CY7C109D-10ZXIT application, or CY7C109D-10ZXIT 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 microcontrollers requiring VIH ≥ 2.2 V and VOL ≤ 0.4 V.
Technical Context
The CY7C109D-10ZXIT implements a fully static 131,072 × 8-bit memory array with asynchronous random access, tri-state I/O drivers, and automatic power-down when deselected via CE1/CE2 logic. It supports three distinct control modes: address-transition–controlled read, OE-controlled read, and WE-controlled write.
Its dual CE architecture enables seamless bank selection in multi-SRAM systems without external logic, while TTL-level input thresholds (VIH = 2.2 V min, VIL = 0.8 V max) ensure direct interfacing with 5 V microprocessors and FPGAs lacking level-shifting circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| tAA | 10 ns - maximum address-to-data valid delay; enables direct interface with 100 MHz bus cycles. |
| ICC (active) | 80 mA at 10 ns - defines peak supply current during burst reads/writes at full speed. |
| ISB2 (standby) | 3 mA - CMOS-mode standby current when CE1 HIGH or CE2 LOW; critical for low-power hold states. |
| VDR | 2.0 V - minimum VCC required to retain stored data during power-down; supports battery-backed retention. |
| VOH / VOL | 2.4 V min / 0.4 V max - TTL-compatible output swing ensures reliable signaling into 5 V logic families. |
| Capacitance | CIN = COUT = 8 pF - low pin capacitance minimizes signal integrity degradation on dense PCB traces. |
Pinout & Package
Package: 32-pin TSOP I (10.16 mm × 20.95 mm), Pb-free, JEDEC standard, 0.5 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128 K-word addressing; no internal latching. |
| I/O0–I/O7 | Bidirectional Data Bus | Tri-state CMOS I/O pins; high-impedance when CE1 HIGH, CE2 LOW, OE HIGH, or WE LOW. |
| CE1 | Chip Enable 1 | Active LOW enable; primary selection signal; initiates power-up when asserted. |
| CE2 | Chip Enable 2 | Active HIGH enable; used with CE1 for hierarchical decoding or bank isolation. |
| OE | Output Enable | Active LOW control of data bus output drivers; independent of write cycle. |
| WE | Write Enable | Active LOW signal enabling write operations; must be LOW with CE1 LOW and CE2 HIGH. |
| VCC | Power Supply | +5.0 V ± 0.5 V nominal; powers core logic and I/O buffers. |
| GND | Ground Reference | Signal and power return path; decoupling required within 10 mm of VCC pin. |
Key Features
| Feature | Design Value |
|---|---|
| Pin- and function-compatible with CY7C109B | Enables drop-in replacement in existing designs without layout or firmware changes. |
| Automatic power-down on deselect | Reduces system power by >96% vs. active mode when CE1/CE2 inactive; no external control needed. |
| TTL-compatible inputs/outputs | Eliminates need for level shifters when interfacing with legacy 5 V MCUs like Intel 80C188 or Motorola 68HC11. |
| 2.0 V data retention | Allows backup to coin-cell or supercapacitor during main power loss without data corruption. |
| Tri-state outputs with fast Z-state transitions | tHZOE = 5 ns and tLZCE = 3 ns enable clean bus sharing in multi-device systems without contention. |
Applications
| Industrial PLC Data Buffering | Legacy Microcontroller Memory Expansion |
|---|---|
Use Scenario: Storing real-time I/O scan data and program variables in programmable logic controllers operating at –40 °C to +85 °C ambient. IC Role / Device Role / Timing Role: Asynchronous SRAM providing zero-wait-state read/write access to CPU during cyclic scan execution. Use Value: 10 ns tAA ensures deterministic response within tight 100 µs I/O cycle budgets; ISB2 = 3 mA extends battery life during brownout events. |
Use Scenario: Adding external RAM to 8-bit/16-bit microcontrollers (e.g., Zilog Z80, NEC V30) with limited on-chip memory. IC Role / Device Role / Timing Role: Parallel memory-mapped data storage accessed via dedicated address/data bus and discrete CE/OE/WE controls. Use Value: TTL-compatible VIH/VOL eliminates level-shifter components; dual CE simplifies bank decoding for >64 KB address spaces. |
| Automotive Instrument Cluster Display Cache | Medical Diagnostic Equipment Frame Buffer |
Use Scenario: Holding rendered GUI bitmaps and configuration parameters in automotive dashboards meeting AEC-Q100 Grade 2 requirements. IC Role / Device Role / Timing Role: Non-volatile-cached SRAM buffer between display controller and graphics processor for flicker-free updates. Use Value: 2.0 V data retention preserves critical calibration data during ignition-off periods; 8 pF pin capacitance maintains signal integrity on long flex cables. |
Use Scenario: Temporary storage of digitized ultrasound or ECG waveform segments prior to DSP processing or network upload. IC Role / Device Role / Timing Role: High-reliability, low-latency scratchpad memory supporting real-time acquisition at up to 10 MS/s sample rates. Use Value: tRC = 10 ns enables back-to-back reads of consecutive samples; ISB1 = 10 mA (TTL mode) supports fast wake-from-sleep diagnostics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar static RAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AS6C1008-10PCN | Same density (128K × 8), but 3.3 V only; tAA = 10 ns; ISB = 1 µA typical | Requires level translation for 5 V systems; unsuitable for direct replacement without redesign | Select only if migrating to 3.3 V platform and ultra-low standby is mandatory |
| ISSI IS61LV1024-10TLI | 5 V tolerant I/O, tAA = 10 ns, ISB = 2 µA, but VIH(min) = 2.0 V (vs. 2.2 V for CY7C109D) | Slightly looser input threshold may reduce noise margin in noisy industrial environments | Acceptable for new designs where lower standby dominates over marginal VIH margin |
Compared with AS6C1008-10PCN and IS61LV1024-10TLI, CY7C109D-10ZXIT provides guaranteed 5 V operation, tighter VIH specification (2.2 V min), and proven interoperability with legacy 5 V processors-making it the preferred choice for backward-compatible upgrades and ruggedized systems.
Availability
CY7C109D-10ZXIT is available at Aetrix Electronics and suitable for industrial PLC data buffering, legacy microcontroller memory expansion, and automotive instrument cluster display cache requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CY7C109D-10ZXIT 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 pin-compatible migration paths from older 1-Mbit SRAMs in mission-critical embedded systems requiring predictable timing and robust 5 V interoperability.
FAQ
Is CY7C109D-10ZXIT compatible with 3.3 V systems?
No. CY7C109D-10ZXIT is specified for 5 V ± 0.5 V operation only. Its VIH and VOL thresholds, ICC characteristics, and internal voltage references are optimized for 5 V TTL logic. Operating at 3.3 V violates Absolute Maximum Ratings and results in undefined behavior, including data corruption and excessive ISB.
What is the function of CE2 being active HIGH while CE1 is active LOW?
CE2 serves as a polarity-complementary chip enable that allows hierarchical memory decoding. When CE1 is LOW and CE2 is HIGH, the device is selected. This dual-signal scheme enables simple AND/OR logic for multi-bank configurations-for example, using CE2 to select upper/lower memory regions while CE1 enables individual devices within each region.
Does CY7C109D-10ZXIT require an external clock signal?
No. CY7C109D-10ZXIT is an asynchronous static RAM with no clock input. All operations are controlled by edge- or level-sensitive control signals (CE1, CE2, OE, WE) and address stability windows defined by tAA, tSCE, and tAW. Timing is purely combinatorial and does not depend on clock frequency or duty cycle.
Can NC pins be left unconnected or tied to ground?
NC (No Connect) pins are not bonded to the die and have no internal connection. They must be left floating-neither tied to ground nor VCC-as per Cypress Application Note AN6081. Connecting NC pins may cause parasitic coupling or violate package thermal design rules, potentially affecting reliability or signal integrity.
CY7C109D-10ZXIT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 32-TFSOP (0.724", 18.40mm 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-TSOP I
CY7C109D-10ZXIT FAQ
1.How can I place an order for CY7C109D-10ZXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C109D-10ZXIT 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-10ZXIT reliable?
The price and inventory of CY7C109D-10ZXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C109D-10ZXIT is usually 5 days.
3.What payment methods are accepted for CY7C109D-10ZXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C109D-10ZXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C109D-10ZXIT?
CY7C109D-10ZXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C109D-10ZXIT 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-10ZXIT?
For technical support, including CY7C109D-10ZXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C109D-10ZXIT requirements.
6.How does Aetrix verify that CY7C109D-10ZXIT is sourced from the original manufacturer or authorized distributors?
All CY7C109D-10ZXIT 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-10ZXIT meets industry standards.
7.What is the process for return or replacement of CY7C109D-10ZXIT?
All CY7C109D-10ZXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY7C109D-10ZXIT, 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-10ZXIT part is unused and in its original packaging.
Return procedure for CY7C109D-10ZXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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