My Inquiry
My Account
Infineon Technologies CY7C199C-12VI
- Part No.:
- CY7C199C-12VI
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-BSOJ (0.300", 7.62mm Width)
- Datasheet:
-
CY7C199C-12VI.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:3,101
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CY7C199C-12VI from Cypress Semiconductor is a 256K-bit (32K × 8) asynchronous CMOS static RAM with 12 ns access time, 5.0V ±10% supply operation, and automatic CE-controlled power-down. It delivers TTL-compatible I/O, 2.0V data retention, and low standby current (10 µA in CMOS mode), deployed in industrial-grade embedded controllers requiring deterministic memory timing.
For engineers reviewing the CY7C199C-12VI datasheet, CY7C199C-12VI pinout, CY7C199C-12VI application, or CY7C199C-12VI equivalent, key selection criteria include access time consistency across temperature, CE-driven power management, VCC tolerance for legacy 5V systems, and SOJ/TSOP I package compatibility with space-constrained PCB layouts.
Technical Context
The CY7C199C-12VI implements a fully asynchronous SRAM interface with independent CE, OE, and WE controls enabling flexible read/write sequencing. Its internal architecture includes address decoding logic, sense amplifiers, and a power-down circuit triggered by CE high, eliminating external sleep control logic.
It supports three operating modes: active read (CE=LOW, OE=LOW, WE=HIGH), active write (CE=LOW, WE=LOW), and automatic power-down (CE=HIGH). Data retention at 2.0V is guaranteed without clock or refresh, making it suitable for battery-backed memory hold applications.
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) | 12 ns - ensures sub-83 MHz synchronous system interfacing with margin |
| Supply Voltage Range | 4.5V to 5.5V - compatible with legacy 5V TTL/CMOS logic rails and noisy industrial supplies |
| Standby Current (ISB2) | 10 µA at VCC = 5.5V - enables >1-year battery backup in low-power hold mode |
| Data Retention Voltage | 2.0V minimum - maintains stored data during brown-out or controlled power collapse |
| Operating Temperature | –40°C to +85°C - qualified for industrial ambient environments without derating |
| Output Drive | IOH = –4.0 mA, IOL = 8.0 mA - directly drives standard TTL loads without buffers |
Pinout & Package
Available in 28-pin SOJ (300-mil), 28-pin TSOP I, and 28-pin DIP packages. Pin functions are identical across all variants; SOJ and TSOP I are surface-mount optimized, while DIP supports prototyping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Input | 15-bit address bus supporting full 32K-word addressing; no internal latching |
| I/O0–I/O7 | Bidirectional Data Bus | True 8-bit bidirectional I/O with high-impedance state controlled by OE and CE |
| CE | Chip Enable | Primary enable/disable control; asserts power-down when HIGH (TTL/CMOS compatible threshold) |
| OE | Output Enable | Gates output drivers only; does not affect power state or write capability |
| WE | Write Enable | Active-LOW write strobe; write occurs on CE/WE overlap, independent of OE |
| VCC, VSS | Power Supply | Single 5V supply with dedicated ground; no separate I/O or core voltage domains |
Key Features
| Feature | Design Value |
|---|---|
| 12 ns Access Time | Guaranteed tAA ≤ 12 ns over full industrial temperature and voltage range - eliminates wait-state insertion in 5V microcontroller buses |
| Automatic CE Power-down | Reduces ICC to 10 µA when CE = HIGH - removes need for external power-gating circuitry |
| TTL-Compatible I/O | VIH = 2.2V min, VOL = 0.4V max at 8 mA - interoperates directly with 74LS, 74F, and older microprocessor families |
| 2.0V Data Retention | Maintains valid data with VCC ≥ 2.0V and CE disabled - supports non-volatile hold during main supply interruption |
| Pb-Free Packaging Option | RoHS-compliant SOJ/TSOP I variants available - meets industrial environmental compliance without performance trade-off |
Applications
| Industrial PLC Memory Buffer | Legacy Microcontroller Data RAM |
|---|---|
Use Scenario: Real-time I/O scanning and program execution in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Primary data RAM holding ladder logic variables, register states, and communication buffers. Use Value: 12 ns access ensures deterministic scan cycle timing under worst-case temperature and voltage; CE power-down reduces thermal load during idle periods. | Use Scenario: External RAM expansion for 8051, Z80, or Motorola 68000-based embedded systems with 5V bus architecture. IC Role / Device Role / Timing Role: Byte-accessible general-purpose memory mapped into processor address space. Use Value: TTL-compatible signaling and 5V operation eliminate level-shifting; 28-pin SOJ fits dense legacy PCB footprints. |
| Medical Device Parameter Storage | Automated Test Equipment (ATE) Pattern Memory |
Use Scenario: Storing calibration coefficients, patient history, and safety-critical configuration in Class II medical instruments. IC Role / Device Role / Timing Role: Nonvolatile-hold memory retaining settings during AC power loss or battery swap. Use Value: Guaranteed 2.0V data retention enables seamless transition to backup power; industrial temp rating supports sterilization cycles. | Use Scenario: High-speed stimulus/response pattern storage in semiconductor ATE platforms running at 50+ MHz test clocks. IC Role / Device Role / Timing Role: Static pattern buffer accessed synchronously by test controller with minimal latency jitter. Use Value: Fixed 12 ns tAA eliminates timing variability across temperature; low output capacitance (8 pF) preserves signal integrity on long traces. |
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-12TLI | 32K × 16 organization, 3.3V-only supply, 12 ns access, LVCMOS I/O | Requires data bus width adaptation and level translation in 5V systems | Select only when migrating to 3.3V architecture and wider data path is needed |
| ON Semiconductor MCM6295DW12 | 32K × 8, 5V, 12 ns, but discontinued and last-time-buy only; no Pb-free option | Limited supply continuity and no RoHS-compliant variant available | Use only for legacy repair; not recommended for new designs due to obsolescence risk |
Compared with IS61LV25616AL-12TLI and MCM6295DW12, the CY7C199C-12VI uniquely combines industrial 5V tolerance, Pb-free packaging, and guaranteed 2.0V data retention - critical for long-lifecycle, battery-assisted, or safety-certified applications where voltage margin and regulatory compliance are non-negotiable.
Availability
CY7C199C-12VI is available at Aetrix Electronics and suitable for industrial PLCs, legacy microcontroller systems, and medical device parameter storage requiring stable component supply across extended product lifecycles.
Supply support for CY7C199C-12VI 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 embedded markets.
The CY7C199C belongs to Cypress's legacy asynchronous SRAM portfolio, engineered specifically for drop-in replacement of aging 5V memory in mission-critical systems where timing predictability and voltage robustness outweigh density or speed scaling.
FAQ
Is CY7C199C-12VI pin-compatible with CY7C199-12V?
Yes. The CY7C199C-12VI is the industrial-temperature (–40°C to +85°C) version of the CY7C199-12V (commercial, 0°C to +70°C), sharing identical pinout, electrical characteristics, and timing specifications except for temperature range qualification.
Does CY7C199C-12VI require an external clock or refresh circuit?
No. As a static RAM, it retains data indefinitely while powered and requires no clock input or periodic refresh cycles. Its operation is purely asynchronous and controlled solely by CE, OE, and WE signals.
Can CY7C199C-12VI operate reliably at 4.5V with full 12 ns access time?
Yes. The datasheet guarantees tAA ≤ 12 ns across the full 4.5V–5.5V VCC range and –40°C to +85°C ambient, verified under worst-case AC test conditions including 3 ns input rise/fall times and 1.5V timing reference levels.
What is the maximum capacitive load the I/O pins can drive while maintaining 12 ns timing?
The AC test load is defined as 30 pF (C1) with 480 Ω/255 Ω Thevenin source. Driving >30 pF increases tDOE/tHZOE delays beyond specification; layout must limit net capacitance to ≤25 pF for guaranteed 12 ns system-level timing.
CY7C199C-12VI 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
CY7C199C-12VI FAQ
1.How can I place an order for CY7C199C-12VI through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C199C-12VI 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-12VI reliable?
The price and inventory of CY7C199C-12VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C199C-12VI is usually 5 days.
3.What payment methods are accepted for CY7C199C-12VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C199C-12VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C199C-12VI?
CY7C199C-12VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C199C-12VI 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-12VI?
For technical support, including CY7C199C-12VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C199C-12VI requirements.
6.How does Aetrix verify that CY7C199C-12VI is sourced from the original manufacturer or authorized distributors?
All CY7C199C-12VI 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-12VI meets industry standards.
7.What is the process for return or replacement of CY7C199C-12VI?
All CY7C199C-12VI units undergo pre-shipment inspection (PSI). If there is an issue with CY7C199C-12VI, 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-12VI part is unused and in its original packaging.
Return procedure for CY7C199C-12VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY7C199C-12VI Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
