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Infineon Technologies CY7C199CN-15ZXC
- Part No.:
- CY7C199CN-15ZXC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
CY7C199CN-15ZXC.pdf
- Description:
- IC SRAM 256KBIT PAR 28TSOP I
- Quantity:
- Payment:
- Shipping:
Inventory:1,755
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Product details
Overview
CY7C199CN-15ZXC from Cypress Semiconductor is a 256K-bit (32K × 8) asynchronous CMOS static RAM with 15 ns access time, 5.0V ±10% supply range, TTL-compatible I/O, and automatic CE-controlled power-down mode. It operates across commercial temperature range (0°C to 70°C) and retains data at 2.0V, supporting embedded microcontroller systems requiring fast, low-power volatile memory for boot code or buffer storage.
For engineers reviewing the CY7C199CN-15ZXC datasheet, CY7C199CN-15ZXC pinout, CY7C199CN-15ZXC application, or CY7C199CN-15ZXC equivalent, key selection criteria include access time consistency, standby current under CE deassertion, data retention voltage margin, and compatibility with legacy 28-pin DIP/SOJ/TSOP I footprint designs.
Technical Context
The CY7C199CN-15ZXC implements a fully asynchronous SRAM interface with independent chip enable (CE), output enable (OE), and write enable (WE) controls. Its internal architecture includes row/column decoders, sense amplifiers, and an automated power-down circuit triggered by CE high, reducing ICC to ≤10 µA in CMOS-input mode.
It supports two primary operation modes: OE-controlled read (with WE high) and WE-controlled write (with OE high). Timing is defined by tRC (15 ns), tAA (15 ns), tACE (15 ns), and tPD (15 ns), all guaranteed over full VCC (4.5–5.5V) and temperature range without refresh or clocking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 8 bits - provides byte-wide data bus interface compatible with 8-bit microcontrollers and legacy peripherals. |
| Access Time (tAA) | 15 ns - guarantees valid data output within 15 ns after address stabilization, enabling direct interfacing with 66 MHz system buses. |
| VCC Operating Range | 4.5V to 5.5V - supports standard 5V logic rails with ±10% tolerance, eliminating need for external regulation in industrial 5V systems. |
| Standby Current (ISB2) | 10 µA - achieved when CE ≥ VCC – 0.3V and inputs held at rail, enabling ultra-low-power hold mode during processor sleep. |
| Data Retention Voltage | 2.0V - allows memory contents to persist during brown-out or backup-battery operation without external supervisor circuitry. |
| Input/Output Compatibility | TTL-compatible - accepts VIH ≥ 2.2V and VIL ≤ 0.8V, ensuring interoperability with 74LS, 8051, and Z80 families without level-shifting. |
| Package Type | 28-pin TSOP I (8 × 13.4 mm) - surface-mount form factor optimized for high-density PCB layouts while maintaining pinout compatibility with SOJ and DIP variants. |
Pinout & Package
Package: 28-pin Thin Small Outline Package Type I (TSOP I), 8 mm × 13.4 mm body, 0.55 mm lead pitch, JEDEC MO-153 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Input | 15-bit address bus accepting 0–32767 row/column select; A0 is LSB, A14 is MSB for 32K-word addressing. |
| IO0–IO7 | Bidirectional Data I/O | 8-bit parallel data path; driven high-Z when CE or OE inactive, enabling bus sharing with other peripherals. |
| CE | Chip Enable | Active-low global enable; asserts internal power-down when high, reducing ICC to 10 µA without external control logic. |
| OE | Output Enable | Active-low read control; enables output drivers only when CE is low and OE is low-prevents bus contention during writes. |
| WE | Write Enable | Active-low write strobe; initiates write cycle when CE and WE both low; timing referenced to WE leading edge per tPWE (9 ns min). |
| VCC | Power Supply | +5.0V ±10% core supply; powers all logic and array circuits; decoupling required within 10 mm of Pin 7. |
| VSS | Ground | Signal and power return reference; connected to Pin 21; must be low-inductance plane for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Automated CE Power-Down | Reduces ICC to 10 µA without external sequencing-eliminates need for dedicated power management ICs in battery-backed systems. |
| 2.0V Data Retention | Maintains stored data during undervoltage events down to 2.0V, enabling seamless recovery after power interruption without software reload. |
| 15 ns Guaranteed Access | Meets timing closure for 66 MHz CPU buses without wait states, directly supporting legacy x86, 8051, and Motorola 68K-based designs. |
| TTL-Compatible I/O | Interfaces natively with 74LS, 74F, and microcontroller GPIOs without level translators-reducing BOM count and layout complexity. |
| Pb-Free TSOP I Packaging | RoHS-compliant 28-pin TSOP I footprint ensures drop-in replacement for legacy SOJ/DIP versions while supporting modern SMT assembly. |
Applications
| Industrial PLC Memory Buffer | Legacy Microcontroller Boot RAM |
|---|---|
|
Use Scenario: Stores runtime variables and I/O mapping tables in programmable logic controllers operating in factory environments with wide temperature swings. IC Role / Device Role / Timing Role: Asynchronous byte-wide SRAM providing zero-wait-state data access for real-time ladder logic execution. Use Value: 15 ns tAA ensures deterministic response to sensor input changes; 10 µA ISB2 extends uptime during brief AC outages. |
Use Scenario: Holds initialization code and stack space for 8-bit MCUs (e.g., Intel 8051, Zilog Z8) in medical diagnostic equipment. IC Role / Device Role / Timing Role: Non-refreshed volatile memory mapped into lower 32K address space, accessed via standard MOVX instructions. Use Value: TTL compatibility eliminates glue logic; 2.0V retention preserves calibration data during power cycling between patient sessions. |
| Automotive Instrument Cluster Display Cache | Point-of-Sale Terminal Transaction Buffer |
|
Use Scenario: Caches graphical assets and gauge values in automotive digital dashboards where ECU power may fluctuate during engine cranking. IC Role / Device Role / Timing Role: Standalone SRAM acting as display frame buffer, updated asynchronously by CAN-connected MCU. Use Value: 4.5–5.5V VCC range tolerates battery dips to 4.5V; CE-driven power-down prevents corruption during transient brown-outs. |
Use Scenario: Temporarily stores transaction logs and receipt data in retail terminals before secure upload to backend servers. IC Role / Device Role / Timing Role: High-reliability volatile buffer isolated from main processor bus, accessed via dedicated memory controller. Use Value: 28-pin TSOP I package enables compact, cost-effective PCB layout; Pb-free compliance meets global retail electronics regulations. |
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-15TQLI | 32K × 16 organization, 3.3V-only supply, 15 ns access, 44-pin TSOP II | Requires data bus width adaptation and voltage translation; not pin-compatible | Select if 16-bit data path and lower VCC are prioritized over 5V legacy compatibility. |
| ON Semiconductor MCM6295DW15 | 32K × 8, 5V, 15 ns, but uses 28-pin SOJ only; no TSOP I option; higher ISB (500 µA) | Limited to through-hole or SOJ assembly; lacks low-power CE auto-down feature | Choose only for SOJ-only production lines where TSOP I reflow is unavailable. |
Compared with IS61LV25616AL-15TQLI and MCM6295DW15, the CY7C199CN-15ZXC uniquely combines 5V TTL compatibility, 10 µA CE-triggered standby, and TSOP I packaging-making it the sole option for drop-in replacement in existing 28-pin 5V SRAM designs requiring minimal power during idle.
Availability
CY7C199CN-15ZXC is available at Aetrix Electronics and suitable for industrial PLC memory buffers, legacy microcontroller boot RAM, automotive instrument cluster display caches, and point-of-sale terminal transaction buffers requiring stable component supply across extended product lifecycles.
Supply support for CY7C199CN-15ZXC 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 fabless semiconductor company specializing in memory, microcontrollers, and programmable logic solutions for industrial, automotive, and consumer applications.
The CY7C199CN belongs to Cypress's legacy asynchronous SRAM portfolio, designed specifically to replace older bipolar and HMOS memories in 5V systems requiring reliable, low-power, pin-compatible CMOS alternatives.
FAQ
Is CY7C199CN-15ZXC compatible with 3.3V systems?
No. The device requires 4.5V to 5.5V VCC and is not 3.3V tolerant. Applying 3.3V will result in undefined operation and failure to meet 15 ns access timing. It is strictly a 5V TTL-compatible part, intended for legacy 5V designs.
Does CY7C199CN-15ZXC require an external clock or refresh signal?
No. It is a fully asynchronous static RAM with no clock input or refresh requirement. Data retention is maintained as long as VCC remains ≥2.0V and CE is asserted; no periodic access or timing controller is needed.
What is the maximum operating frequency supported by CY7C199CN-15ZXC?
The device does not operate at a fixed frequency. Its maximum effective throughput is governed by tRC = 15 ns, allowing up to 66.7 million read/write cycles per second in ideal conditions. System bus speed depends on controller timing margins, not internal clocking.
Can CY7C199CN-15ZXC be used in automotive applications?
The -15ZXC suffix denotes commercial temperature grade (0°C to 70°C). For automotive use, Cypress specifies the Automotive-A grade variant (e.g., CY7C199CN-15AXC), which is qualified to –40°C to +85°C and meets AEC-Q100 requirements-this part is not automotive-qualified.
CY7C199CN-15ZXC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 28-TSSOP (0.465", 11.80mm Width)
- Packaging:
- Tray
- 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:
- 15ns
- Access Time:
- 15 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSOP I
CY7C199CN-15ZXC FAQ
1.How can I place an order for CY7C199CN-15ZXC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C199CN-15ZXC 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-15ZXC reliable?
The price and inventory of CY7C199CN-15ZXC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C199CN-15ZXC is usually 5 days.
3.What payment methods are accepted for CY7C199CN-15ZXC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C199CN-15ZXC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C199CN-15ZXC?
CY7C199CN-15ZXC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C199CN-15ZXC 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-15ZXC?
For technical support, including CY7C199CN-15ZXC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C199CN-15ZXC requirements.
6.How does Aetrix verify that CY7C199CN-15ZXC is sourced from the original manufacturer or authorized distributors?
All CY7C199CN-15ZXC 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-15ZXC meets industry standards.
7.What is the process for return or replacement of CY7C199CN-15ZXC?
All CY7C199CN-15ZXC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C199CN-15ZXC, 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-15ZXC part is unused and in its original packaging.
Return procedure for CY7C199CN-15ZXC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY7C199CN-15ZXC Tags
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