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Infineon Technologies CY7C188-20VC
- Part No.:
- CY7C188-20VC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 32-BSOJ (0.300", 7.62mm Width)
- Datasheet:
-
CY7C188-20VC.pdf
- Description:
- IC SRAM 288KBIT PARALLEL 32SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:2,261
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Product details
Overview
CY7C188-20VC from Cypress Semiconductor is a 32 K × 9 (294,912-bit) asynchronous CMOS static RAM with 20 ns access time, TTL-compatible I/O, and dual chip enable (CE1 active-low, CE2 active-high) for flexible memory expansion in embedded control systems. It operates at 5 V ±10%, delivers 935 mW active power, and supports high-impedance tri-state outputs during deselect, write, or output disable.
For engineers reviewing the CY7C188-20VC datasheet, CY7C188-20VC pinout, CY7C188-20VC application, or CY7C188-20VC equivalent, key selection criteria include its 20 ns read cycle time, automatic CE-controlled power-down (ISB1 ≤ 35 mA), 9-bit bidirectional I/O bus, 32-pin SOJ package, and compatibility with legacy 5 V microprocessor buses requiring non-multiplexed address/data interfaces.
Technical Context
The CY7C188-20VC implements a full asynchronous SRAM architecture with independent address decoding (A0–A14), nine bidirectional data lines (I/O0–I/O8), and three control signals (CE1, CE2, OE, WE) enabling precise timing control over read/write cycles and power state transitions. Its dual CE logic allows hierarchical memory mapping without external gating logic.
Power management is handled entirely internally: automatic power-down activates when CE1 is HIGH or CE2 is LOW, reducing ICC from 170 mA to ≤35 mA (TTL inputs) or ≤15 mA (CMOS inputs). Output drivers are fully tri-stated under all inactive conditions-deselect, OE HIGH, or WE LOW-ensuring clean bus sharing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32,768 words × 9 bits = 294,912 total bits; supports byte-wide or 9-bit parallel data paths |
| Access Time (tAA) | 20 ns max; enables direct interfacing with 50 MHz microcontrollers without wait states |
| VCC Supply | 5 V ±10%; compatible with standard TTL/CMOS logic rails and legacy 5 V system power domains |
| Active Current (ICC) | 170 mA max at fMAX; corresponds to ~935 mW typical active power consumption |
| Standby Current (ISB1) | 35 mA max with TTL inputs; achieves >75% power reduction during chip disable |
| I/O Voltage Levels | VIH = 2.2 V min, VOL = 0.4 V max; ensures robust noise margin and interoperability with 5 V logic families |
| Output Enable Delay (tDOE) | 9 ns max; guarantees fast data availability after OE assertion in read cycles |
Pinout & Package
Package: 32-pin (300-mil) molded SOJ, JEDEC MS-012AC compliant, body width 7.62 mm, lead pitch 1.27 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Inputs | 15-bit address bus supporting full 32K-word addressing; no multiplexing required |
| I/O0–I/O8 | Bidirectional Data Lines | 9-bit parallel I/O port; high-impedance when CE1 HIGH, CE2 LOW, OE HIGH, or WE LOW |
| CE1 | Active-Low Chip Enable | Primary chip select; device enabled only when CE1 = LOW and CE2 = HIGH |
| CE2 | Active-High Chip Enable | Secondary chip select; enables hierarchical decode with CE1 for multi-chip memory banks |
| OE | Active-Low Output Enable | Controls output driver state independently of CE; allows read-only access while maintaining chip select |
| WE | Active-Low Write Enable | Initiates write cycle when CE1 = LOW, CE2 = HIGH, and WE = LOW; data latched on WE rising edge |
| VCC | Power Supply | +5 V supply pin (Pin 32); decoupling required within 1 inch per datasheet layout guidelines |
| GND | Ground Reference | Signal and power ground (Pin 16); must be low-inductance connection to minimize noise |
Key Features
| Feature | Design Value |
|---|---|
| Dual Chip Enable Logic | CE1 (active-low) and CE2 (active-high) allow cascaded memory banks without external logic gates |
| Automatic Power-Down | Reduces ICC by >75% when deselected; eliminates need for external power-gating circuitry |
| TTL-Compatible I/O | Meets VIH/VIL and VOH/VOL specs for direct interface with 5 V microprocessors and FPGAs |
| Tri-State Output Control | Three independent conditions (CE, OE, WE) force I/O pins to high-Z, preventing bus contention |
| 20 ns Read Cycle | tRC = 20 ns guarantees zero-wait-state operation with 50 MHz CPU buses using standard timing margins |
Applications
| Industrial PLC Memory Buffer | Legacy Microcontroller Data Cache |
|---|---|
Use Scenario: Storing real-time I/O status and register values in programmable logic controllers with 8051- or Z80-based control engines. IC Role / Device Role / Timing Role: Asynchronous data buffer providing deterministic 20 ns read/write latency for cyclic scan execution. Use Value: Eliminates wait states and simplifies timing design due to guaranteed tAA ≤ 20 ns and full tri-state bus isolation. | Use Scenario: Expanding on-chip RAM in vintage 8-bit microcontrollers used in medical instrumentation and test equipment. IC Role / Device Role / Timing Role: Off-chip SRAM providing additional 32K × 9 workspace for firmware variables and stack operations. Use Value: Dual CE support enables seamless integration into existing 5 V bus architectures without address decoder redesign. |
| Avionics Display Frame Buffer | Communications Protocol Stack Buffer |
Use Scenario: Holding pixel data for monochrome cockpit displays in certified avionics systems operating across –55°C to +125°C. IC Role / Device Role / Timing Role: Radiation-tolerant (per MIL-STD-883) static RAM serving as non-refreshed frame buffer for character-based displays. Use Value: Automatic power-down reduces thermal load during display idle periods while maintaining data retention. | Use Scenario: Temporary storage of packetized serial protocol data (e.g., HDLC, SDLC) in industrial gateways and modems. IC Role / Device Role / Timing Role: Bidirectional 9-bit data path accommodates 8-bit payload + parity bit in legacy telecom protocols. Use Value: OE-controlled read and WE-controlled write allow independent control of data flow direction and timing alignment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar asynchronous SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AS6C1008-20TIN | 128K × 8 organization, 20 ns access, 3.3 V supply only | Requires level-shifting for 5 V systems; larger capacity but narrower data bus | Select only if migrating to 3.3 V domain and needing higher density |
| IS61LV25616AL-20TQLI | 256K × 16 organization, 20 ns, 3.3 V core with 5 V tolerant I/O | Wider 16-bit bus; requires address/data bus reconfiguration; not pin-compatible | Choose for new 3.3 V designs requiring higher bandwidth and backward-compatible I/O voltage |
Compared with AS6C1008-20TIN and IS61LV25616AL-20TQLI, the CY7C188-20VC remains the only 5 V-only, 9-bit, 32K×9 SRAM with dual CE logic and SOJ packaging-making it irreplaceable in legacy 5 V industrial and avionics systems where voltage, bus width, and package footprint are fixed constraints.
Availability
CY7C188-20VC is available at Aetrix Electronics and suitable for industrial PLCs, avionics display subsystems, and legacy microcontroller-based medical devices requiring stable component supply and long-term obsolescence management.
Supply support for CY7C188-20VC 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 specializing in memory, microcontrollers, and programmable solutions for industrial, automotive, and communications markets.
The CY7C188 belongs to Cypress's Fast Asynchronous SRAM product line, designed specifically for 5 V systems requiring deterministic timing, low-power standby, and drop-in compatibility with legacy microprocessor buses.
FAQ
Is CY7C188-20VC RoHS-compliant?
No. The CY7C188-20VC uses a non-Pb-free 32-pin SOJ package as specified in the ordering code "V" and datasheet Rev. *C. It contains leaded solder in the package finish and does not meet current RoHS Directive 2011/65/EU Annex II exemptions for legacy components.
Can CY7C188-20VC operate at 3.3 V?
No. The device is specified only for 5 V ±10% operation (4.5 V to 5.5 V). Applying 3.3 V violates the absolute maximum rating for VCC and will result in undefined behavior, including failure to meet tAA ≤ 20 ns or proper tri-state control.
What is the function of the NC pins on CY7C188-20VC?
Pins 12 and 29 are No Connect (NC) terminals per the pin configuration diagram. They are physically present but not bonded internally. These pins must remain unconnected-no pull-up, pull-down, or routing-and should be left floating in PCB layout to avoid parasitic coupling or mechanical stress.
Does CY7C188-20VC require an external clock signal?
No. It is a fully asynchronous static RAM with no clock input. All operations-read, write, and power-down-are controlled solely by edge- or level-sensitive control signals (CE1, CE2, OE, WE) and address/data bus timing, eliminating clock distribution complexity and jitter sensitivity.
CY7C188-20VC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 32-BSOJ (0.300", 7.62mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Asynchronous
- Memory Size:
- 288Kbit
- Memory Organization:
- 32K x 9
- 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
CY7C188-20VC FAQ
1.How can I place an order for CY7C188-20VC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C188-20VC 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 CY7C188-20VC reliable?
The price and inventory of CY7C188-20VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C188-20VC is usually 5 days.
3.What payment methods are accepted for CY7C188-20VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C188-20VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C188-20VC?
CY7C188-20VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C188-20VC 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 CY7C188-20VC?
For technical support, including CY7C188-20VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C188-20VC requirements.
6.How does Aetrix verify that CY7C188-20VC is sourced from the original manufacturer or authorized distributors?
All CY7C188-20VC 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 CY7C188-20VC meets industry standards.
7.What is the process for return or replacement of CY7C188-20VC?
All CY7C188-20VC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C188-20VC, 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 CY7C188-20VC part is unused and in its original packaging.
Return procedure for CY7C188-20VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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