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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Infineon Technologies CY7C199C-12VXC

Name: CY7C199C-12VXC
Brand: Infineon Technologies
SKU: CY7C199C-12VXC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CY7C199C-12VXC

Manufacturer:: Infineon Technologies

Category:: Memory

Package:: 28-BSOJ (0.300", 7.62mm Width)

Datasheet:: CY7C199C-12VXC.pdf

Description:: IC SRAM 256KBIT PARALLEL 28SOJ

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Product details

Overview

CY7C199C-12VXC from Cypress Semiconductor Corporation is a 256K-bit (32K × 8) asynchronous CMOS static RAM with 12 ns access time, 5.0V ±10% supply range, TTL-compatible I/Os, and automatic CE-controlled power-down. It operates across commercial temperature range (0°C to 70°C) and supports high-speed memory interfacing in microcontroller-based systems, industrial controllers, and legacy bus architectures.

For engineers reviewing the CY7C199C-12VXC datasheet, CY7C199C-12VXC pinout, CY7C199C-12VXC application, or CY7C199C-12VXC equivalent, key selection criteria include guaranteed 12 ns read cycle time, 2.0V data retention capability, low 10 µA CMOS standby current (ISB2), and compatibility with 28-pin SOJ, DIP, and TSOP I packages.

Technical Context

The CY7C199C-12VXC implements a full 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 when CE is deasserted.

It supports three timing grades (12/15/20 ns), with this variant specified for 12 ns tRC and tAA. All AC parameters-including tHZOE (5 ns), tLZCE (3 ns), and tPD (12 ns)-are measured under defined test loads (R_TH = 167 Ω, V_TH = 1.73 V, C_L = 30 pF) and 1.5 V timing reference levels.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Organization	32K × 8 bits - delivers byte-wide data access without external demultiplexing
Access Time (tAA)	12 ns - enables direct interface with 80 MHz bus clocks in non-pipelined systems
Supply Voltage	4.5 V to 5.5 V - ensures robust operation across noisy industrial 5 V rails
Data Retention Voltage	2.0 V - allows low-power suspend mode with battery backup at minimal voltage
Standby Current (ISB2)	10 µA - reduces system idle power by >99% vs active operation (85 mA)
Operating Temperature	0°C to 70°C - qualified for commercial-grade embedded control and instrumentation
Input Capacitance	8 pF - limits signal integrity impact on high-speed address/data buses

Pinout & Package

Package: 28-pin SOJ (300-mil), RoHS-compliant, body size 11.4 mm × 13.4 mm × 2.9 mm.

Pin	Circuit Role	Design Meaning
A0–A14	Address Input	15-bit address bus supporting full 32K-word addressing; no multiplexing required
I/O0–I/O7	Bidirectional Data Bus	True 8-bit bidirectional interface; high-impedance state controlled by OE and CE
CE	Chip Enable	Primary device select; initiates automatic power-down when HIGH (TTL/CMOS compatible)
OE	Output Enable	Gates output drivers only; does not affect internal power state or write capability
WE	Write Enable	Controls write cycle initiation; write occurs only when CE and WE are both LOW
VCC	Power Supply	5.0 V core supply; decoupling required within 10 mm of Pin 28 per layout guidelines
VSS	Ground	Signal and power return; Pin 14 serves as sole ground reference for all I/O and core logic

Key Features

Feature	Design Value
Automated Power-down	Reduces ICC to 10 µA when CE is deasserted-no external control logic needed
TTL-Compatible I/O	Accepts standard 5 V TTL input thresholds (VIH ≥ 2.2 V, VIL ≤ 0.8 V) while driving 4 mA HIGH / 8 mA LOW
2.0 V Data Retention	Maintains stored data during brown-out or backup-battery operation without refresh
Low Capacitance I/O	8 pF max input/output capacitance minimizes loading on high-frequency address/data lines
Three Package Options	SOJ, DIP, and TSOP I footprints allow drop-in replacement across legacy and space-constrained designs

Applications

Industrial PLC Memory Buffer

Legacy PC BIOS Storage

Use Scenario: Stores configuration registers and real-time I/O mapping in programmable logic controllers with 8-bit parallel buses.

IC Role / Device Role / Timing Role: Asynchronous byte-wide SRAM providing deterministic 12 ns read latency for deterministic scan-cycle execution.

Use Value: Eliminates wait states in ladder-logic execution loops due to guaranteed tAA ≤ 12 ns and zero hold-time requirements.

Use Scenario: Holds boot firmware shadow code and CMOS setup data in ISA-bus embedded PCs and single-board computers.

IC Role / Device Role / Timing Role: Non-volatile-supporting SRAM used with external battery backup for BIOS parameter storage.

Use Value: Enables reliable data retention down to 2.0 V, reducing backup battery size and extending service life beyond 10 years.

Medical Instrument Data Log

Avionics Display Frame Buffer

Use Scenario: Captures sensor samples at 100 kHz in portable ECG monitors using burst-mode DMA transfers.

IC Role / Device Role / Timing Role: High-reliability buffer memory interfaced directly to microcontroller's external memory bus.

Use Value: 85 mA active current and 10 µA standby current support battery-powered operation over 8+ hour sessions.

Use Scenario: Provides dual-port-accessible frame storage for monochrome cockpit display controllers with discrete graphics engines.

IC Role / Device Role / Timing Role: Byte-addressable scratchpad memory synchronized to display controller's pixel clock domain.

Use Value: 28-pin SOJ package fits tight pitch layouts; 12 ns access ensures pixel fetches meet 60 Hz refresh deadlines.

Equivalent & Alternatives

The following parts are listed as comparable options for similar asynchronous SRAM applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AS6C4008-12PIN	Same 32K × 8 organization and 12 ns speed, but 2.7–3.6 V supply only; no 5 V tolerance	Requires level-shifting in 5 V systems; unsuitable for direct replacement without redesign	Select only if migrating to 3.3 V platform with compatible I/O voltage margins
IS61LV25616AL-12TLI	16-bit bus (256K × 16), 3.3 V only, 12 ns access; different pinout and address width	Not pin-compatible; requires PCB revision and address bus reconfiguration	Choose for higher bandwidth needs where 16-bit data path justifies layout change

Compared with AS6C4008-12PIN and IS61LV25616AL-12TLI, the CY7C199C-12VXC uniquely supports 5 V operation with TTL compatibility, retains data at 2.0 V, and offers three package variants-making it the only drop-in solution for legacy 5 V embedded systems requiring proven reliability and long-term availability.

Availability

CY7C199C-12VXC is available at Aetrix Electronics and suitable for industrial PLC memory buffers, legacy PC BIOS storage, medical instrument data logs, and avionics display frame buffers requiring stable component supply across extended production lifecycles.

Supply support for CY7C199C-12VXC 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 Corporation, now part of Infineon Technologies, designs high-reliability memory and programmable logic solutions for industrial, automotive, and communications markets.

The CY7C199C belongs to Cypress's legacy asynchronous SRAM product line, engineered specifically for pin-compatible replacement of aging 5 V memory components in mission-critical embedded systems with strict timing and voltage compliance requirements.

FAQ

What is the maximum operating current for CY7C199C-12VXC at 12 ns speed?

The maximum operating supply current (ICC) is 85 mA under worst-case conditions: VCC = 5.5 V, f = 1/tRC = 83.3 MHz, and IOUT = 0 mA. This value appears in the DC Electrical Characteristics table on page 4 of Rev. *C datasheet and reflects peak dynamic consumption during continuous read cycles.

Does CY7C199C-12VXC support automatic power-down with both TTL and CMOS input logic levels?

Yes. Two distinct standby modes are specified: ISB1 (30 µA) for TTL-compatible CE inputs (VIH ≥ 2.2 V), and ISB2 (10 µA) for CMOS-compatible CE inputs (VIH ≥ VCC – 0.3 V). Both activate automatically when CE is HIGH and require no additional control signals.

Can CY7C199C-12VXC be used in industrial temperature range (–40°C to +85°C)?

No. The -12VXC suffix denotes the commercial grade (0°C to +70°C). Industrial temperature operation requires the CY7C199C-12VI variant, which shares identical electrical specifications but is screened and tested across –40°C to +85°C ambient conditions.

What is the minimum pulse width required for WE in write cycles?

The minimum WE pulse width (tPWE) is 8 ns for the 12 ns speed grade. This is specified in the AC Electrical Characteristics table (page 5) and must be met regardless of whether the write is CE-controlled or WE-controlled to ensure reliable data capture into the memory array.

CY7C199C-12VXC 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:: 0°C ~ 70°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 28-SOJ

CY7C199C-12VXC FAQ

1.How can I place an order for CY7C199C-12VXC through Aetrix?

Please submit a Request for Quotation (RFQ) for CY7C199C-12VXC 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-12VXC reliable?

The price and inventory of CY7C199C-12VXC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C199C-12VXC is usually 5 days.

3.What payment methods are accepted for CY7C199C-12VXC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C199C-12VXC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CY7C199C-12VXC?

CY7C199C-12VXC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CY7C199C-12VXC 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-12VXC?

For technical support, including CY7C199C-12VXC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C199C-12VXC requirements.

6.How does Aetrix verify that CY7C199C-12VXC is sourced from the original manufacturer or authorized distributors?

All CY7C199C-12VXC 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-12VXC meets industry standards.

7.What is the process for return or replacement of CY7C199C-12VXC?

All CY7C199C-12VXC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C199C-12VXC, 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-12VXC part is unused and in its original packaging.

Return procedure for CY7C199C-12VXC:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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