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Infineon Technologies CY7C199CN-15ZXCT
- Part No.:
- CY7C199CN-15ZXCT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
CY7C199CN-15ZXCT.pdf
- Description:
- IC SRAM 256KBIT PAR 28TSOP I
- Quantity:
- Payment:
- Shipping:
Inventory:3,084
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Product details
Overview
CY7C199CN-15ZXCT from Cypress Semiconductor is a 256K-bit (32K × 8) asynchronous CMOS static RAM with 15 ns access time, 5.0V ±10% supply operation, TTL-compatible I/O, and automatic CE-controlled power-down mode. It delivers 80 mA active current and 500 µA standby current in a Pb-free 28-pin TSOP I package, deployed in legacy industrial controllers requiring deterministic memory access without refresh overhead.
For engineers reviewing the CY7C199CN-15ZXCT datasheet, CY7C199CN-15ZXCT pinout, CY7C199CN-15ZXCT application, or CY7C199CN-15ZXCT equivalent, key selection criteria include verified 15 ns tAA/tRC timing, 2.0V data retention capability, CE-driven low-power state entry, and compatibility with 5V microcontroller bus interfaces in space-constrained PCB layouts.
Technical Context
The CY7C199CN-15ZXCT implements a fully asynchronous SRAM architecture with independent address decoding, sense amplifier-based read path, and bidirectional I/O buffers controlled by CE, OE, and WE. Its logic block integrates row/column decoders, power-down circuitry triggered solely by CE high, and TTL-level input thresholds (VIH ≥ 2.2 V, VIL ≤ 0.8 V) for direct interfacing with 5V MCUs.
It supports two distinct write modes: WE-controlled (OE = VIH) and CE-controlled (WE = VIH), with guaranteed tSD = 9 ns data setup and tHD = 0 ns hold relative to write termination. Data retention operates at VCC = 2.0 V with ICCDR ≤ 150 µA, enabling battery-backed operation during main supply loss.
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 / tRC) | 15 ns - guarantees deterministic read latency under worst-case 5V/70°C commercial conditions |
| VCC Supply Range | 4.5 V to 5.5 V - supports standard 5V rail with ±10% tolerance, eliminating need for external regulation |
| Standby Current (ISB2) | 500 µA - enables ultra-low-power hold mode when CE is deasserted, critical for intermittent operation |
| Data Retention Voltage | 2.0 V - allows memory contents to persist during brown-out or backup battery operation |
| Input/Output Compatibility | TTL-level - ensures direct connection to 5V logic families without level-shifting circuitry |
| Package Type | 28-pin TSOP I (8 × 13.4 mm) - surface-mount footprint optimized for high-density industrial PCBs |
Pinout & Package
Package: 28-pin Thin Small Outline Package Type I (TSOP I), 8 mm × 13.4 mm body, 0.55 mm lead pitch, Pb-free finish.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Input | 15-bit address bus accepting 0–32767 row/column select; no internal latching - requires stable address during CE low |
| IO0–IO7 | Bidirectional Data I/O | 8-bit parallel data path; high-impedance when OE = VIH or CE = VIH, driven only during valid read/write cycles |
| CE | Chip Enable | Primary device select; asserts internal logic and powers up core when low; triggers automatic ISB2 standby on high |
| OE | Output Enable | Controls output buffer enable independently of CE; allows read data gating without deselecting device |
| WE | Write Enable | Active-low write strobe; initiates write cycle when CE and WE both low; defines write timing reference point |
| VCC | Power Supply | +5.0 V ±10% core supply; decoupling required within 10 mm of pin 7 per datasheet layout guidelines |
| VSS | Ground | Reference return for all signals and power; connected to pin 21 - must be low-inductance plane tie |
Key Features
| Feature | Design Value |
|---|---|
| Automated CE Power-Down | Reduces ICC to 500 µA without external control logic - eliminates need for sleep-state GPIO management |
| 2.0 V Data Retention | Maintains stored content during main supply interruption down to 2.0 V - enables seamless backup via coin cell |
| 15 ns Access with No Wait States | Meets timing closure for 66 MHz CPU buses without wait-state insertion - preserves real-time determinism |
| TTL-Compatible I/O | Accepts 0.8 V/2.2 V logic thresholds and drives 2.4 V/0.4 V levels - interoperable with legacy 5V ASICs and FPGAs |
| Pb-Free TSOP I Packaging | RoHS-compliant 28-pin surface-mount package - supports automated reflow assembly and meets IPC-7351B land pattern standards |
Applications
| Industrial PLC Memory Buffer | Legacy Medical Device Data Log |
|---|---|
|
Use Scenario: Storing real-time sensor acquisition buffers and configuration registers in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Asynchronous byte-wide scratchpad memory interfaced directly to 8051 or Z80 derivatives; provides zero-wait-state access during scan-cycle execution. Use Value: 15 ns tAA ensures full 32K buffer readout within single 1 ms PLC scan window; CE power-down cuts idle power by >99% between scans. |
Use Scenario: Capturing ECG waveform snapshots and calibration coefficients in Class IIa portable diagnostic equipment with battery backup. IC Role / Device Role / Timing Role: Non-refresh volatile storage holding last 30 seconds of raw analog samples; retains data during AC power loss via 2.0 V retention mode. Use Value: 500 µA ISB2 minimizes quiescent drain on CR2032; TTL compatibility avoids level-shifters in compact 4-layer PCB design. |
| Avionics Display Frame Buffer | Test Equipment Pattern Generator |
|
Use Scenario: Holding rasterized display frames for monochrome cockpit instrumentation with MIL-STD-810G thermal cycling requirements. IC Role / Device Role / Timing Role: Dual-port accessible memory mapped into FPGA video controller address space; operates across –40°C to +85°C industrial range. Use Value: Guaranteed 15 ns tRC at 85°C enables reliable frame update at 60 Hz; ΘJA = 88.6°C/W supports conduction-cooled enclosure design. |
Use Scenario: Storing digital stimulus patterns for boundary-scan test systems requiring deterministic vector replay timing. IC Role / Device Role / Timing Role: High-speed pattern store synchronized to 25 MHz JTAG clock; accessed via parallel address/data bus from CPLD sequencer. Use Value: tHZOE = 7 ns ensures clean output disable before next pattern address load; 80 mA ICC supports simultaneous 8-bit drive into 50 Ω loads. |
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, 3.3 V only, 15 ns access, 44-pin TSOP II | Requires data bus width adaptation and voltage translation; larger footprint | Select if 16-bit bus width and lower voltage operation are mandatory; not drop-in compatible |
| ON Semiconductor MCM6295DW15R | 32K × 8, 5 V, 15 ns, 28-pin SOJ package - same timing but different pinout and thermal resistance (ΘJA = 79°C/W) | SOJ package requires wave-solder or selective reflow; less suitable for fine-pitch SMT lines | Choose for through-hole or mixed-technology boards where SOJ handling is preferred over TSOP I |
Compared with IS61LV25616AL-15TQLI and MCM6295DW15R, the CY7C199CN-15ZXCT offers identical 32K×8 organization and 5V operation in a smaller TSOP I footprint with superior thermal performance (ΘJA = 88.6°C/W vs. 79°C/W), making it optimal for high-reliability, space-constrained industrial designs.
Availability
CY7C199CN-15ZXCT is available at Aetrix Electronics and suitable for industrial PLCs, legacy medical diagnostics, and avionics display subsystems requiring stable component supply with long-term lifecycle support.
Supply support for CY7C199CN-15ZXCT 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 solutions for industrial, automotive, and aerospace applications, emphasizing signal integrity and long-lifecycle support.
The CY7C199CN belongs to Cypress's legacy asynchronous SRAM product line, engineered specifically for 5V microcontroller and ASIC co-processor memory expansion in environments where refresh-free operation and deterministic timing are essential.
FAQ
Does CY7C199CN-15ZXCT support true 5V operation across its full commercial temperature range?
Yes. The device is specified for 4.5 V to 5.5 V VCC across 0°C to +70°C ambient, with all AC/DC parameters - including 15 ns tAA, 80 mA ICC, and 500 µA ISB2 - guaranteed under these conditions per Rev. *B datasheet Table 4 and Table 5.
Can CY7C199CN-15ZXCT retain data when VCC drops below 4.5 V?
Yes. At VCC = 2.0 V, the device maintains stored data with ICCDR ≤ 150 µA, as confirmed in the Data Retention Characteristics table (Page 7). This mode activates automatically when VCC falls within 2.0–4.5 V while CE remains asserted.
What is the maximum capacitive load the IO pins can drive reliably?
The outputs are characterized for COUT ≤ 8 pF (Page 5), and AC timing assumes 30 pF test load (Page 6). For reliable 15 ns operation, total trace + load capacitance should remain ≤ 25 pF; exceeding this risks timing violation due to increased rise/fall times.
Is the TSOP I package of CY7C199CN-15ZXCT compatible with standard reflow profiles?
Yes. As a Pb-free TSOP I, it complies with JEDEC J-STD-020D moisture sensitivity level 3 and supports peak reflow temperatures up to 260°C for ≤ 30 seconds. Pre-bake is required if exposed >168 hours at >60% RH per packaging specification.
CY7C199CN-15ZXCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 28-TSSOP (0.465", 11.80mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-15ZXCT FAQ
1.How can I place an order for CY7C199CN-15ZXCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C199CN-15ZXCT 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-15ZXCT reliable?
The price and inventory of CY7C199CN-15ZXCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C199CN-15ZXCT is usually 5 days.
3.What payment methods are accepted for CY7C199CN-15ZXCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C199CN-15ZXCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C199CN-15ZXCT?
CY7C199CN-15ZXCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C199CN-15ZXCT 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-15ZXCT?
For technical support, including CY7C199CN-15ZXCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C199CN-15ZXCT requirements.
6.How does Aetrix verify that CY7C199CN-15ZXCT is sourced from the original manufacturer or authorized distributors?
All CY7C199CN-15ZXCT 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-15ZXCT meets industry standards.
7.What is the process for return or replacement of CY7C199CN-15ZXCT?
All CY7C199CN-15ZXCT units undergo pre-shipment inspection (PSI). If there is an issue with CY7C199CN-15ZXCT, 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-15ZXCT part is unused and in its original packaging.
Return procedure for CY7C199CN-15ZXCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY7C199CN-15ZXCT Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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Microchip Technology
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AT24C02C-SSHM-T
Microchip Technology
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Microchip Technology
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M24C02-FMC6TG
STMicroelectronics
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Microchip Technology
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Microchip Technology
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Microchip Technology
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Microchip Technology
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Microchip Technology
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AT24C08C-STUM-T
Microchip Technology
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