My Inquiry
My Account
Infineon Technologies CY7C199CN-20ZXIT
- Part No.:
- CY7C199CN-20ZXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
CY7C199CN-20ZXIT.pdf
- Description:
- IC SRAM 256KBIT PAR 28TSOP I
- Quantity:
- Payment:
- Shipping:
Inventory:1,756
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CY7C199CN-20ZXIT from Cypress Semiconductor is a 256K-bit (32K × 8) asynchronous CMOS static RAM with 20 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, serving as main memory or buffer in microcontroller-based instrumentation and legacy industrial controllers.
For engineers reviewing the CY7C199CN-20ZXIT datasheet, CY7C199CN-20ZXIT pinout, CY7C199CN-20ZXIT application, or CY7C199CN-20ZXIT equivalent, key selection criteria include access time consistency under 5.0V operation, low standby current (≤500 µA), CE-driven power management, and compatibility with 28-pin TSOP I footprint for space-constrained PCB layouts.
Technical Context
The CY7C199CN-20ZXIT implements a fully asynchronous SRAM interface with independent address latching, no internal clocks or refresh circuitry, and three-state bidirectional I/Os controlled by OE and CE. Its read/write timing is governed solely by external control signal transitions - CE, OE, and WE - with no internal state machine or pipeline.
Power management relies on CE assertion: when CE ≥ VCC – 0.3V (CMOS input threshold), the device enters low-power retention mode drawing ≤10 µA; when CE is active low, full operation resumes with ICC ≤75 mA at max frequency. Data retention at 2.0V is guaranteed without external bias or backup circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 8 bits - supports byte-wide data bus interfacing without multiplexing or external glue logic |
| Access Time (tAA) | 20 ns - defines minimum address-to-valid-data delay for deterministic timing in 50 MHz-equivalent bus systems |
| Supply Voltage | 4.5V to 5.5V - compatible with standard 5V TTL/CMOS logic rails and tolerant of typical board-level ripple |
| Standby Current (ISB2) | ≤500 µA - enables low-power hold mode during processor sleep without external power gating |
| Data Retention Voltage | 2.0V - allows battery-backed retention using single-cell LiFePO₄ or coin cell without voltage regulation |
| Operating Temperature | 0°C to +70°C - qualified for commercial-grade embedded systems including test equipment and point-of-sale terminals |
| Package Type | 28-pin TSOP I (8 × 13.4 mm) - surface-mount compatible with automated assembly and moderate thermal dissipation (ΘJA = 88.6°C/W) |
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 parallel latch-on-CE or latch-on-OE depending on control sequence |
| IO0–IO7 | Bidirectional Data I/O | 8-bit tri-state data bus; driven high-Z when CE or OE inactive, supports shared bus topology |
| CE | Chip Enable | Primary selection signal; asserts memory array and I/O drivers; enables automatic power-down when deasserted |
| OE | Output Enable | Controls output driver enable only; does not affect internal array power state or write capability |
| WE | Write Enable | Active-low write strobe; initiates write cycle when CE is active; overlaps with CE for valid write window |
| VCC | Power Supply | +5.0V core supply; decoupling required within 10 mm of Pin 7 per layout guidelines |
| VSS | Ground | Signal and power return reference; connected to Pin 21 for low-inductance ground path in TSOP I |
Key Features
| Feature | Design Value |
|---|---|
| 20 ns access time with full 5.0V operation | Enables direct interface with 8-bit microcontrollers (e.g., 8051 derivatives) running at ≤25 MHz system clock without wait states |
| Automatic CE-controlled power-down | Reduces standby current to ≤10 µA without requiring external control logic or firmware intervention |
| TTL-compatible inputs and outputs | Eliminates level-shifting components when interfacing with legacy 5V logic families (74LS, 74HC) |
| 2.0V data retention | Permits use of simple 2.0V backup source (e.g., supercapacitor or single LiFePO₄ cell) for nonvolatile data hold |
| Pb-free TSOP I package | Meets RoHS Directive 2011/65/EU and supports lead-free reflow profiles (J-STD-020D) |
Applications
| Industrial PLC Memory Buffer | Legacy Test Equipment Data Storage |
|---|---|
Use Scenario: Stores real-time sensor acquisition buffers and configuration registers in modular I/O modules of DIN-rail mounted PLCs. IC Role / Device Role / Timing Role: Asynchronous byte-wide SRAM providing zero-wait-state memory access for ARM7-based controller peripherals. Use Value: 20 ns tAA ensures deterministic response to interrupt-driven data capture at 50 kS/s sampling rates without CPU stalling. | Use Scenario: Holds calibration coefficients and waveform trace data in benchtop oscilloscopes and function generators manufactured before 2010. IC Role / Device Role / Timing Role: Non-refreshing memory mapped directly to Z80 or 68000 CPU address space via dedicated memory decode logic. Use Value: 2.0V data retention preserves calibration data during AC power loss, eliminating need for EEPROM wear leveling or backup batteries. |
| Medical Diagnostic Instrument Cache | Point-of-Sale Terminal Firmware Overlay |
Use Scenario: Caches intermediate image processing results in portable ultrasound units where EMI-sensitive analog front-end shares PCB with digital logic. IC Role / Device Role / Timing Role: Isolated memory bank accessed only during CPU idle cycles to avoid bus contention with ADC DMA transfers. Use Value: Low 500 µA ISB2 current minimizes baseline power draw in battery-operated handheld units between imaging sessions. | Use Scenario: Stores localized language strings and tax-table updates in embedded POS terminals with limited flash endurance. IC Role / Device Role / Timing Role: Volatile overlay RAM loaded at boot from SPI flash; updated dynamically during firmware patching. Use Value: TTL-compatible I/O eliminates level translators needed for legacy 5V flash memory interfaces, reducing BOM count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar asynchronous SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AS6C4008-20TIN | 20 ns access, same 32K × 8 organization, but requires 2.7V–3.6V supply; no 5V tolerance | Not suitable for 5V legacy systems; requires voltage translation or redesign of power rail | Select only if migrating to 3.3V platform and replacing all 5V peripherals |
| IS61LV25616AL-20TQLI | 256K × 16 organization, 3.3V-only, 20 ns access, LVCMOS I/O levels | Doubles data width but incompatible pinout and voltage; needs bus-width adaptation logic | Choose when upgrading to 16-bit data path and accepting full PCB redesign |
Compared with AS6C4008-20TIN and IS61LV25616AL-20TQLI, the CY7C199CN-20ZXIT uniquely supports direct drop-in replacement in existing 5V designs with identical 8-bit bus width, TSOP I footprint, and CE-driven power-down behavior-no voltage translation, bus widening, or timing recalibration required.
Availability
CY7C199CN-20ZXIT is available at Aetrix Electronics and suitable for industrial PLC memory buffers, legacy test equipment data storage, medical diagnostic instrument cache, and point-of-sale terminal firmware overlay requiring stable component supply and long-lifecycle support.
Supply support for CY7C199CN-20ZXIT 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, PSoC, USB, and timing solutions for industrial, automotive, and consumer applications.
The CY7C199CN belongs to Cypress's legacy asynchronous SRAM product line, designed specifically for drop-in replacement of obsolete 28-pin DIP/SOJ SRAMs in cost-sensitive, long-lifecycle industrial and instrumentation systems.
FAQ
What is the maximum operating current for CY7C199CN-20ZXIT under full read/write activity?
The maximum operating supply current (ICC) is 75 mA at VCC = 5.5V, with all I/Os loaded and operating at maximum frequency defined by tRC = 20 ns. This value is measured with outputs driving 4 mA high and 8 mA low loads per pin, per DC electrical specifications on page 4 of the datasheet.
Does CY7C199CN-20ZXIT require an external clock or refresh signal?
No. The CY7C199CN-20ZXIT is a fully asynchronous static RAM with no internal clock, timer, or refresh circuitry. All operations are edge-triggered by CE, OE, and WE signals; data remains valid as long as VCC is maintained above 2.0V, even with all controls inactive.
Can CY7C199CN-20ZXIT be used in automotive applications?
No. The CY7C199CN-20ZXIT is specified only for commercial temperature range (0°C to +70°C). While the datasheet mentions "Automotive-A" in the Operating Range table, that designation applies only to other speed grades (e.g., –25 variant) and is not validated for this specific –20ZXIT marking. It lacks AEC-Q100 qualification.
What is the pin 1 identifier for the 28-pin TSOP I package of CY7C199CN-20ZXIT?
Pin 1 is the OE (Output Enable) signal, located at the top-left corner of the TSOP I package when the notch or dot marker is oriented upward. This matches the pin 1 location shown in Figure 2 (TSOP I layout) on page 2 of the datasheet (Document #: 001-06435 Rev. *B).
CY7C199CN-20ZXIT 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:
- 20ns
- Access Time:
- 20 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSOP I
CY7C199CN-20ZXIT FAQ
1.How can I place an order for CY7C199CN-20ZXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C199CN-20ZXIT 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-20ZXIT reliable?
The price and inventory of CY7C199CN-20ZXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C199CN-20ZXIT is usually 5 days.
3.What payment methods are accepted for CY7C199CN-20ZXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C199CN-20ZXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C199CN-20ZXIT?
CY7C199CN-20ZXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C199CN-20ZXIT 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-20ZXIT?
For technical support, including CY7C199CN-20ZXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C199CN-20ZXIT requirements.
6.How does Aetrix verify that CY7C199CN-20ZXIT is sourced from the original manufacturer or authorized distributors?
All CY7C199CN-20ZXIT 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-20ZXIT meets industry standards.
7.What is the process for return or replacement of CY7C199CN-20ZXIT?
All CY7C199CN-20ZXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY7C199CN-20ZXIT, 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-20ZXIT part is unused and in its original packaging.
Return procedure for CY7C199CN-20ZXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY7C199CN-20ZXIT 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.
