My Inquiry
My Account
Infineon Technologies CY7C199CL-15ZXC
- Part No.:
- CY7C199CL-15ZXC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
CY7C199CL-15ZXC.pdf
- Description:
- IC SRAM 256KBIT PAR 28TSOP I
- Quantity:
- Payment:
- Shipping:
Inventory:4,660
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CY7C199CL-15ZXC 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/Os, and automatic CE-controlled power-down. It delivers 80 mA max operating current and 500 µA CMOS standby current, and is used in legacy industrial controllers requiring nonvolatile data retention at 2.0V.
For engineers reviewing the CY7C199CL-15ZXC datasheet, CY7C199CL-15ZXC pinout, CY7C199CL-15ZXC application, or CY7C199CL-15ZXC equivalent, key selection criteria include access time consistency across temperature, CE-driven low-power mode timing (tPD = 15 ns), data retention voltage margin (2.0V), and TSOP I package compatibility with space-constrained PCB layouts.
Technical Context
The CY7C199CL-15ZXC implements a fully asynchronous memory interface with independent CE, OE, and WE controls. Its internal architecture includes address decoding logic, sense amplifiers, and an automated power-down circuit triggered by CE high, reducing ICC to 500 µA without external sequencing.
All timing parameters-including tRC (15 ns), tAA (15 ns), tACE (15 ns), and tPD (15 ns)-are guaranteed over the industrial temperature range (–40°C to +85°C) at VCC = 4.5V–5.5V. Data retention operates down to 2.0V with tCDR = 0 ns and tR = 200 µs recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 8 bits - supports byte-wide data bus interfacing without multiplexing or external width conversion |
| Access Time (tAA) | 15 ns - guarantees data validity within 15 ns of stable address and CE/OE assertion for real-time control loops |
| Supply Voltage | 4.5V to 5.5V - compatible with standard 5V logic rails and tolerant of line regulation drift in industrial power supplies |
| Standby Current (ISB2) | 500 µA - enables ultra-low-power hold mode during processor sleep without auxiliary power gating |
| Data Retention Voltage | 2.0V - preserves SRAM contents during brown-out or backup battery operation without external supervisor IC |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded systems including PLC I/O modules and motor drives |
| Package Type | 28-pin TSOP I (Z28) - 8 mm × 13.4 mm footprint optimized for high-density PCB layouts with automated assembly |
Pinout & Package
Package: 28-pin TSOP I (Z28), 8 mm × 13.4 mm body, 0.55 mm pitch, JEDEC MO-141 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Input | 15-bit address bus supporting full 32K-word addressing; no address multiplexing required |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit TTL-compatible data path; high-impedance when OE = VIH or CE = VIH |
| CE | Chip Enable | Active-low master enable; initiates automatic power-down when high (ISB2 = 500 µA) |
| OE | Output Enable | Active-low read control; output goes high-Z within 9 ns (tHZOE) when deasserted |
| WE | Write Enable | Active-low write strobe; latches data on falling edge with tPWE ≥ 9 ns minimum pulse width |
| VCC | Power Supply | +5.0V ±10% core supply; decoupling required within 10 mm of pin 7 per layout guidelines |
| VSS | Ground | Signal reference plane; pin 21 serves as primary ground return for I/O and core logic |
Key Features
| Feature | Design Value |
|---|---|
| Automatic CE Power-down | Reduces ICC to 500 µA without software intervention or external control signals |
| TTL-Compatible I/O | Eliminates level-shifting components when interfacing with legacy 5V microcontrollers and FPGAs |
| 2.0V Data Retention | Maintains valid memory contents during undervoltage conditions without external backup circuitry |
| Industrial Temperature Range | Guaranteed operation from –40°C to +85°C without derating, suitable for uncooled enclosures |
| TSOP I Package | Enables surface-mount assembly on dense control boards while meeting IPC Class 2 reliability standards |
Applications
| Industrial PLC I/O Module | Legacy CNC Controller Buffer |
|---|---|
|
Use Scenario: Real-time I/O status buffering in modular programmable logic controllers with 5V backplane buses. IC Role / Device Role / Timing Role: Asynchronous SRAM providing deterministic 15 ns read/write response for scan-cycle data exchange between CPU and field terminals. Use Value: Eliminates wait states in ladder logic execution due to guaranteed tRC = 15 ns and zero-latency CE power-down recovery (tPU = 0 ns). |
Use Scenario: Position register storage and motion profile caching in retrofit CNC motion controllers using 8051-based architectures. IC Role / Device Role / Timing Role: Byte-accessible scratchpad memory holding encoder counts and trajectory waypoints during servo update cycles. Use Value: Supports burst-mode data writes via WE control (tWC = 15 ns) while maintaining data integrity during brief AC line sags via 2.0V retention. |
| Medical Infusion Pump UI Cache | Avionics Display Frame Buffer |
|
Use Scenario: Storing user interface state variables and alarm history in Class II medical infusion pumps with strict EMI requirements. IC Role / Device Role / Timing Role: Nonvolatile SRAM retaining critical therapy parameters during main power transitions and battery switchover. Use Value: Achieves fail-safe parameter persistence without EEPROM wear-out or flash write latency, leveraging tCDR = 0 ns and 200 µs tR recovery. |
Use Scenario: Dual-port frame buffer emulation in legacy avionics display units using discrete SRAM instead of integrated video memory. IC Role / Device Role / Timing Role: Synchronized read/write memory accessed alternately by graphics controller and display refresh engine. Use Value: Enables flicker-free 60 Hz updates via tHZOE = 9 ns fast output disable and tLZOE = 0 ns immediate drive enable on OE reassertion. |
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, 3.3V-only supply, 15 ns access, 44-pin TSOP II | Requires data bus width adaptation and level translation; not drop-in for 8-bit 5V systems | Select only if migrating to 3.3V architecture and needing wider word size |
| ON Semiconductor MCM6295DW15 | 32K × 8, 5V, 15 ns, 28-pin SOJ package; higher ISB1 = 30 mA (vs. 500 µA) | Lacks automatic CE power-down; requires external gating for low-power hold mode | Prefer when SOJ socketing is mandatory and standby current is not critical |
Compared with IS61LV25616AL-15TQLI and MCM6295DW15, the CY7C199CL-15ZXC uniquely combines 5V TTL compatibility, sub-mA standby, and true automatic power-down-making it irreplaceable in legacy 5V industrial designs where board space, power budget, and signal integrity are constrained.
Availability
CY7C199CL-15ZXC is available at Aetrix Electronics and suitable for industrial PLC I/O modules, legacy CNC controller buffers, medical infusion pump UI caches, and avionics display frame buffers requiring stable component supply across extended product lifecycles.
Supply support for CY7C199CL-15ZXC 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 logic solutions for industrial, automotive, and aerospace applications.
The CY7C199C family was engineered specifically for cost-sensitive, long-lifecycle 5V embedded systems requiring deterministic asynchronous memory access and robust low-power operation without firmware overhead.
FAQ
What is the maximum operating current for CY7C199CL-15ZXC at 15 ns speed grade?
The maximum VCC operating supply current (ICC) is 80 mA under worst-case conditions: VCC = 5.5V, IOUT = 0 mA, and f = FMAX = 1/tRC. This value is measured with all outputs loaded and addresses toggling at maximum frequency, per DC Electrical Characteristics table on page 4 of Rev. *B datasheet.
Does CY7C199CL-15ZXC support automatic power-down without external control signals?
Yes. When CE is driven high, the device automatically enters low-power mode drawing ≤500 µA (ISB2), regardless of OE or WE state. No clock, enable pin, or configuration register is required-power-down is purely hardware-triggered by CE voltage level per Truth Table and Power Down Circuit block diagram.
Can CY7C199CL-15ZXC retain data during a 3.3V brown-out event?
No. Data retention is specified only down to 2.0V (VDR). At 3.3V, the device remains fully operational but does not enter retention mode. Retention activates only when VCC drops to ≤2.0V while CE ≥ VCC – 0.3V, preserving contents until power is restored or VCC falls below 1.5V.
Is the TSOP I package of CY7C199CL-15ZXC lead-free and RoHS-compliant?
Yes. The ZXC suffix denotes lead-free, RoHS-compliant construction per Cypress's Product Portfolio Note and packaging specifications in the datasheet. The 28-pin TSOP I (Z28) uses matte tin terminations and meets JEDEC J-STD-020 moisture sensitivity level 3 requirements.
CY7C199CL-15ZXC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 28-TSSOP (0.465", 11.80mm Width)
- Packaging:
- Bag
- 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
CY7C199CL-15ZXC FAQ
1.How can I place an order for CY7C199CL-15ZXC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C199CL-15ZXC 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 CY7C199CL-15ZXC reliable?
The price and inventory of CY7C199CL-15ZXC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C199CL-15ZXC is usually 5 days.
3.What payment methods are accepted for CY7C199CL-15ZXC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C199CL-15ZXC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C199CL-15ZXC?
CY7C199CL-15ZXC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C199CL-15ZXC 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 CY7C199CL-15ZXC?
For technical support, including CY7C199CL-15ZXC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C199CL-15ZXC requirements.
6.How does Aetrix verify that CY7C199CL-15ZXC is sourced from the original manufacturer or authorized distributors?
All CY7C199CL-15ZXC 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 CY7C199CL-15ZXC meets industry standards.
7.What is the process for return or replacement of CY7C199CL-15ZXC?
All CY7C199CL-15ZXC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C199CL-15ZXC, 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 CY7C199CL-15ZXC part is unused and in its original packaging.
Return procedure for CY7C199CL-15ZXC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY7C199CL-15ZXC 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 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.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
