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Infineon Technologies CY7C199CN-12VXA
- Part No.:
- CY7C199CN-12VXA
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-BSOJ (0.300", 7.62mm Width)
- Datasheet:
-
CY7C199CN-12VXA.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:4,107
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Product details
Overview
CY7C199CN-12VXA from Cypress Semiconductor is a 256K-bit (32K × 8) asynchronous CMOS static RAM with 12 ns access time, 5.0V ±10% supply range, and automatic CE-controlled power-down mode. It operates across commercial temperature range (0°C to 70°C), supports TTL-compatible I/O, and retains data down to 2.0V - deployed in legacy industrial controllers requiring fast, low-power volatile memory with pin-stable timing.
For engineers reviewing the CY7C199CN-12VXA datasheet, CY7C199CN-12VXA pinout, CY7C199CN-12VXA application, or CY7C199CN-12VXA equivalent, key selection criteria include verified 12 ns tAA/tRC timing, 85 mA active ICC, 500 µA CMOS standby current, TSOP I package compatibility, and deterministic CE-driven power-down behavior under deselected conditions.
Technical Context
The CY7C199CN-12VXA implements a fully asynchronous SRAM interface with independent address decoding, sense-amplifier-based read path, and bidirectional I/O drivers controlled by CE, OE, and WE. Its logic block integrates row/column decoders, input buffers, and a dedicated power-down circuit that forces high-Z outputs and reduces ICC to ≤500 µA when CE is deasserted.
All timing parameters are specified at VCC = 5.0V ±10%, TA = 0°C to 70°C, with input transition times ≤3 ns and voltage reference levels at 1.5V. Read cycle timing (tRC = 12 ns) is governed by address-to-data valid (tAA = 12 ns) and CE-to-output valid (tACE = 12 ns), while write cycle (tWC = 12 ns) requires minimum tPWE (8 ns) and tSD (8 ns) for reliable data capture.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 8 bits - provides byte-wide data bus interface without external multiplexing |
| Access Time (tAA / tRC) | 12 ns - guarantees data validity within 12 ns of address or CE assertion, enabling 83 MHz max bus operation |
| VCC Supply Range | 4.5V to 5.5V - compatible with standard 5V TTL/CMOS logic rails and legacy power domains |
| Active Current (ICC) | 85 mA max - defines worst-case dynamic power draw during continuous read/write cycling at f = 1/tRC |
| Standby Current (ISB2) | 500 µA max - measured with CE ≥ VCC – 0.3V and CMOS inputs held valid; enables low-power idle states |
| Data Retention Voltage | 2.0V min - allows memory contents to persist during brown-out or controlled power-down sequences |
| Operating Temperature | 0°C to 70°C - qualified for commercial-grade embedded systems with no extended thermal derating required |
Pinout & Package
Package: 28-pin TSOP I (8 mm × 13.4 mm), RoHS-compliant, surface-mount.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Input | 15-bit address bus - selects one of 32K locations; A0 least significant bit |
| IO0–IO7 | Input/Output | 8-bit bidirectional data bus - tristated when CE HIGH or OE HIGH during reads/writes |
| CE | Control | Chip Enable - LOW enables device; HIGH forces automatic power-down and high-Z outputs |
| OE | Control | Output Enable - LOW enables data output; HIGH disables outputs (high-Z) regardless of CE/WE state |
| WE | Control | Write Enable - LOW initiates write cycle; must overlap with CE LOW; controls data latch timing |
| VCC | Supply | +5.0V power rail - supplies core logic and I/O drivers; decoupling required per datasheet layout guidelines |
| VSS | Supply | Ground reference - common return path for all internal circuits and I/O signals |
Key Features
| Feature | Design Value |
|---|---|
| 12 ns access time | Enables direct interfacing with 8051, Z80, and 68K-family microcontrollers without wait-state insertion |
| Automatic CE power-down | Reduces ICC to ≤500 µA without external control logic - eliminates need for separate sleep-mode sequencing |
| TTL-compatible I/O | Accepts 0.8V/2.2V logic thresholds and drives 4mA/8mA loads - interoperable with legacy 5V logic families |
| 2.0V data retention | Maintains stored data during partial power loss - supports graceful shutdown and battery-backed hold modes |
| Pb-free TSOP I packaging | Meets RoHS Directive 2011/65/EU; 8×13.4 mm footprint enables high-density PCB layouts in space-constrained designs |
Applications
| Industrial PLC Memory Buffer | Legacy Medical Instrument Data Cache |
|---|---|
Use Scenario: Real-time I/O scan buffer in DIN-rail mounted programmable logic controllers with 5V backplane architecture. IC Role / Device Role / Timing Role: Asynchronous SRAM providing zero-wait-state data storage for register-mapped I/O image updates. Use Value: 12 ns tAA ensures deterministic response to 100 kHz scan cycles; CE-driven power-down cuts background power by >99% during idle polling intervals. |
Use Scenario: Temporary waveform storage in analog front-end modules of electrocardiogram (ECG) analyzers with isolated 5V supply rails. IC Role / Device Role / Timing Role: Volatile buffer holding digitized lead data prior to DSP processing or flash transfer. Use Value: 2.0V data retention preserves last 5 seconds of ECG trace during brief AC dropout; TSOP I package fits tight 2-layer PCB layouts. |
| Automotive Diagnostic Tool RAM | Point-of-Sale Terminal Firmware Cache |
Use Scenario: Non-volatile firmware staging area in OBD-II scan tools operating in vehicle cabin environments (0°C–70°C). IC Role / Device Role / Timing Role: Fast-access scratchpad for loading diagnostic protocol handlers into microcontroller RAM before execution. Use Value: 85 mA ICC supports burst transfers from SPI flash; 500 µA ISB2 extends battery life during multi-hour vehicle off periods. |
Use Scenario: Transaction log buffer in thermal receipt printers with 5V-only power architecture and space-limited mainboard. IC Role / Device Role / Timing Role: Byte-addressable memory storing pending print jobs and error recovery state between power cycles. Use Value: TTL-compatible I/O interfaces directly with 74HC-series address latches; 28-pin DIP variant available for through-hole prototyping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar asynchronous SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISSI IS61LV25616AL-12TQLI | 32K × 16 organization, 3.3V only, 12 ns access, LVCMOS I/O | Requires data bus width adaptation (16-bit vs. 8-bit); incompatible with 5V systems | Select only if migrating to 3.3V design with wider data path and no 5V legacy interface requirement |
| ON Semiconductor MCM6295DW12 | 32K × 8, 5V, 12 ns, but uses 28-pin SOJ (not TSOP I); higher ISB = 1 mA | Same pinout function but different mechanical footprint; less efficient standby power | Choose only when SOJ socket compatibility is mandatory and 500 µA ISB is not critical |
Compared with IS61LV25616AL-12TQLI and MCM6295DW12, the CY7C199CN-12VXA uniquely delivers 5V TTL compatibility, 500 µA standby current, and TSOP I packaging in a drop-in-replaceable 32K×8 configuration - making it irreplaceable in cost-sensitive, 5V, space-constrained legacy upgrades.
Availability
CY7C199CN-12VXA is available at Aetrix Electronics and suitable for industrial PLC memory buffers, legacy medical instrument data caches, and automotive diagnostic tool RAM requiring stable component supply and long-term obsolescence management.
Supply support for CY7C199CN-12VXA 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 logic solutions for industrial, automotive, and communications infrastructure markets.
The CY7C199CN belongs to Cypress's legacy asynchronous SRAM product line, engineered specifically for 5V system integration where deterministic timing, low standby power, and pin-compatible upgrade paths from earlier 28-pin SRAMs were essential.
FAQ
Is CY7C199CN-12VXA compatible with 3.3V systems?
No. The CY7C199CN-12VXA is strictly a 5V device with VCC specification of 4.5V to 5.5V. Its input thresholds (VIH = 2.2V min) and output drive strength are optimized for 5V TTL/CMOS logic. Operation below 4.5V violates DC specifications and risks data corruption or failure to retain data at 2.0V.
What is the maximum clock frequency supported for burst transfers?
The CY7C199CN-12VXA is asynchronous and has no internal clock. Its maximum effective bus rate is determined by tRC = 12 ns, supporting up to 83.3 MHz continuous read/write cycles when interfaced with appropriate address setup/hold timing. No external clock signal is required or used.
Does this part support battery backup operation?
Yes - the device guarantees data retention down to VCC = 2.0V with ICCDR ≤150 µA. When CE is held HIGH and inputs are stabilized, the SRAM enters retention mode. However, no internal battery switch or monitoring circuitry is included; external battery switchover must be implemented in the system design.
Can CY7C199CN-12VXA replace CY7C199-12VXI in existing designs?
Yes - the "N" suffix denotes Pb-free construction, while electrical and timing specifications are identical to the legacy "X" version. Pinout, AC/DC parameters, and thermal characteristics match exactly. Migration requires only confirmation of reflow profile compatibility with TSOP I Pb-free soldering requirements.
CY7C199CN-12VXA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 28-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:
- 256Kbit
- Memory Organization:
- 32K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 12ns
- Access Time:
- 12 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SOJ
CY7C199CN-12VXA FAQ
1.How can I place an order for CY7C199CN-12VXA through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C199CN-12VXA 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 CY7C199CN-12VXA reliable?
The price and inventory of CY7C199CN-12VXA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C199CN-12VXA is usually 5 days.
3.What payment methods are accepted for CY7C199CN-12VXA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C199CN-12VXA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C199CN-12VXA?
CY7C199CN-12VXA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C199CN-12VXA 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 CY7C199CN-12VXA?
For technical support, including CY7C199CN-12VXA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C199CN-12VXA requirements.
6.How does Aetrix verify that CY7C199CN-12VXA is sourced from the original manufacturer or authorized distributors?
All CY7C199CN-12VXA 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 CY7C199CN-12VXA meets industry standards.
7.What is the process for return or replacement of CY7C199CN-12VXA?
All CY7C199CN-12VXA units undergo pre-shipment inspection (PSI). If there is an issue with CY7C199CN-12VXA, 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 CY7C199CN-12VXA part is unused and in its original packaging.
Return procedure for CY7C199CN-12VXA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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