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Infineon Technologies CY7C199C-15PXC
- Part No.:
- CY7C199C-15PXC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-DIP (0.300", 7.62mm)
- Datasheet:
-
CY7C199C-15PXC.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,109
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Product details
Overview
CY7C199C-15PXC from Cypress Semiconductor is a 256K-bit (32K × 8) asynchronous CMOS static RAM with 15 ns access time, TTL-compatible I/Os, 5.0V ±10% supply operation, and automatic CE-controlled power-down. It serves as a high-speed, low-power data buffer in microcontroller-based systems requiring deterministic read/write timing and reliable data retention down to 2.0V.
For engineers reviewing the CY7C199C-15PXC datasheet, CY7C199C-15PXC pinout, CY7C199C-15PXC application, or CY7C199C-15PXC equivalent, key selection criteria include access time consistency across temperature, CMOS standby current (≤10 µA), VCC operating range (4.5–5.5V), and compatibility with legacy 28-pin DIP/SOJ/TSOP I footprints.
Technical Context
The CY7C199C-15PXC implements a fully asynchronous memory interface with independent CE, OE, and WE controls enabling flexible bus arbitration. Its internal architecture includes a 32K × 8 RAM array with dedicated row/column decoders, sense amplifiers, and input/output buffers designed for zero-bus-turnaround operation.
Power management is handled by dual-mode automatic power-down: ISB1 (30 µA, TTL inputs) activates when CE ≥ VIH and inputs are valid; ISB2 (10 µA, CMOS inputs) engages under deeper sleep conditions with VIN ≥ VCC–0.3V or ≤0.3V. Data retention at 2.0V draws ≤150 µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 8 bits - supports byte-wide data buses without external multiplexing |
| Access Time (tAA) | 15 ns - guarantees data validity within 15 ns of address stabilization, critical for 66 MHz bus timing |
| VCC Operating Range | 4.5 V to 5.5 V - compatible with standard 5V logic rails and tolerates ±10% regulation drift |
| CMOS Standby Current (ISB2) | 10 µA - enables ultra-low-power hold mode during system idle without external gating |
| Data Retention Voltage | 2.0 V - preserves stored data during brown-out or battery-backup scenarios |
| I/O Compatibility | TTL-input/TTL-output - interfaces directly with 74LS/74HC families without level-shifting |
| Package Type | 28-pin Plastic DIP (300-mil) - through-hole mounting for prototyping and industrial control PCBs |
Pinout & Package
Package: 28-pin Plastic Dual In-line Package (DIP), 300-mil width, 0.6-inch body length, 0.1-inch lead pitch.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Input | 15-bit address bus (32K = 2¹⁵) - supports full memory mapping without external address latching |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel data path - high-impedance when OE or CE inactive, eliminating bus contention |
| CE | Chip Enable | Primary device select - initiates automatic power-down when HIGH, enabling multi-SRAM bank management |
| OE | Output Enable | Read-gating control - disables output drivers without affecting internal state or power mode |
| WE | Write Enable | Write strobe - low-active signal that latches data on rising edge of WE or CE, per timing waveforms |
| VCC | Power Supply | +5.0V core supply - decoupling required at Pin 28 per layout guidelines to maintain tAA stability |
| VSS | Ground | Signal and power reference - connected at Pin 14 to minimize ground bounce in high-speed cycles |
Key Features
| Feature | Design Value |
|---|---|
| 15 ns Access Time | Guaranteed tAA ≤15 ns over full commercial temperature range (0°C to +70°C), enabling direct interfacing with 66 MHz microcontrollers |
| Automatic CE Power-down | Reduces ICC from 80 mA (active) to 10 µA (standby) without external control logic or clock gating |
| 2.0V Data Retention | Maintains stored contents during brown-out events or backup battery operation, verified per JEDEC JESD22-A107 |
| TTL-Compatible I/Os | VIH = 2.2 V, VIL = 0.8 V, VOH = 2.4 V, VOL = 0.4 V - eliminates need for level translators in mixed-logic systems |
| Pb-Free Packaging Option | RoHS-compliant 28-pin DIP variant available (CY7C199C-15PXC) with SnAgCu solder finish and halogen-free molding compound |
Applications
| Industrial PLC Data Buffer | Legacy Embedded Instrumentation |
|---|---|
Use Scenario: Real-time data logging in programmable logic controllers where firmware writes sensor samples to SRAM between scan cycles. IC Role / Device Role / Timing Role: Asynchronous write buffer with deterministic 15 ns tWC and tSCE, decoupled from CPU clock domain. Use Value: Eliminates wait states during burst writes; 10 µA ISB2 extends battery life in mains-failover mode. | Use Scenario: Memory expansion for 8051-based test equipment requiring non-volatile configuration storage during power cycling. IC Role / Device Role / Timing Role: Byte-accessible scratchpad RAM interfaced via 8-bit data bus and discrete address decoding. Use Value: TTL compatibility ensures plug-and-play integration; 2.0V retention preserves calibration tables during cold start. |
| Medical Diagnostic Front-End | Avionics Display Controller Cache |
Use Scenario: Temporary storage of digitized ECG waveform segments prior to DSP processing in Class II medical devices. IC Role / Device Role / Timing Role: High-reliability data capture buffer with guaranteed tAA ≤15 ns across –40°C to +85°C industrial grade range. Use Value: Low leakage (≤5 µA IIX) prevents bit corruption during long idle intervals between patient acquisitions. | Use Scenario: Frame buffer cache in ruggedized cockpit display units where radiation tolerance and thermal cycling are critical. IC Role / Device Role / Timing Role: Read-intensive SRAM supporting rapid pixel fetches with tDOE ≤7 ns and tHZOE ≤7 ns for minimal bus turnaround. Use Value: 28-pin DIP package allows conformal coating and mechanical anchoring; ΘJA = 69.33°C/W supports passive cooling in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar asynchronous SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AS6C4008-15TIN | 15 ns access, 32K × 8, 2.7–3.6V supply only - no 5V operation | Requires level-shifting or regulator redesign for 5V systems | Select only if migrating to 3.3V architecture and revalidating timing margins |
| IS61LV25616AL-15TQLI | 15 ns, 256K × 16, 3.3V supply, TSOP-44 package - wider data bus, different footprint | Not pin-compatible; requires PCB redesign and bus-width adaptation | Choose for higher bandwidth needs but only with full hardware revision |
Compared with AS6C4008-15TIN and IS61LV25616AL-15TQLI, the CY7C199C-15PXC uniquely supports 5V operation in legacy DIP form factor with proven 15 ns timing at temperature, making it irreplaceable for drop-in upgrades of installed industrial base.
Availability
CY7C199C-15PXC is available at Aetrix Electronics and suitable for industrial PLC data buffering, legacy embedded instrumentation, medical diagnostic front-ends, and avionics display controller cache applications requiring stable component supply and long-term obsolescence support.
Supply support for CY7C199C-15PXC 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.
The CY7C199C belongs to Cypress's legacy asynchronous SRAM product line, engineered for deterministic timing, low-power retention, and robust operation in noise-prone environments with wide voltage tolerance.
FAQ
What is the maximum operating frequency supported by CY7C199C-15PXC?
The CY7C199C-15PXC does not operate on a clock signal-it is an asynchronous SRAM. Its maximum effective throughput is governed by tRC (read cycle time) of 15 ns, enabling up to ~66.7 MHz random access bursts when interfaced with appropriate address/data setup/hold timing. No internal oscillator or PLL is present.
Does CY7C199C-15PXC support battery backup operation?
Yes-CY7C199C-15PXC guarantees data retention at VCC = 2.0V with ICCDR ≤150 µA, meeting JEDEC JESD22-A107 requirements. This allows direct connection to a 3V lithium coin cell or supercapacitor for hold-mode backup without external regulators or switches.
Can CY7C199C-15PXC be used in place of CY7C199-15PC?
Yes-CY7C199C-15PXC is the Pb-free (RoHS-compliant) revision of CY7C199-15PC. Both share identical timing, pinout, DC characteristics, and package dimensions. The "C" suffix denotes the lead-free version; no design changes or derating are required for substitution.
Is thermal derating required for CY7C199C-15PXC in a 70°C ambient environment?
No thermal derating is needed for commercial-grade CY7C199C-15PXC (0°C to +70°C). Its ΘJA = 69.33°C/W in DIP package ensures junction temperature remains within safe limits (<125°C) at 80 mA ICC and 70°C ambient, assuming standard 2-layer PCB layout per datasheet Figure 5.
CY7C199C-15PXC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 28-DIP (0.300", 7.62mm)
- 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:
- 15ns
- Access Time:
- 15 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 28-PDIP
CY7C199C-15PXC FAQ
1.How can I place an order for CY7C199C-15PXC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C199C-15PXC 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 CY7C199C-15PXC reliable?
The price and inventory of CY7C199C-15PXC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C199C-15PXC is usually 5 days.
3.What payment methods are accepted for CY7C199C-15PXC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C199C-15PXC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C199C-15PXC?
CY7C199C-15PXC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C199C-15PXC 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 CY7C199C-15PXC?
For technical support, including CY7C199C-15PXC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C199C-15PXC requirements.
6.How does Aetrix verify that CY7C199C-15PXC is sourced from the original manufacturer or authorized distributors?
All CY7C199C-15PXC 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 CY7C199C-15PXC meets industry standards.
7.What is the process for return or replacement of CY7C199C-15PXC?
All CY7C199C-15PXC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C199C-15PXC, 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 CY7C199C-15PXC part is unused and in its original packaging.
Return procedure for CY7C199C-15PXC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY7C199C-15PXC Tags
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