K6X0808C1D-GF70T00 - 256Kbit 32Kx8 Async SRAM 70ns | Samsung
N.º da peça: K6X0808C1D-GF70T00 ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $3.2 | $3,20 |
| 10 | $2.85 | $28,50 |
| 100 | $2.45 | $245,00 |
| 500 | $2.1 | $1.050,00 |
| 1.000 | $1.85 | $1.850,00 |
K6X0808C1D-GF70T00 Visão geral
Static RAM (SRAM) is a type of volatile semiconductor memory that stores each bit in a bistable latch circuit, so data is retained as long as power is applied and no refresh cycles are required, unlike DRAM. Within the memory IC hierarchy, SRAM sits alongside DRAM, EEPROM and Flash as a solid-state memory family, and asynchronous SRAM specifically means accesses are controlled purely by address, chip-enable (CE), output-enable (OE) and write-enable (WE) pins with no external clock.
Key features include the fast 70 ns address access time, a fully static design requiring no clock or refresh, CMOS technology for low power consumption, and TTL-compatible I/O levels that simplify interfacing with legacy 5 V microcontrollers and microprocessors. The three control lines (CE, OE, WE) allow easy bus-mastering, bank selection and read/write gating in 8-bit systems.
Fabricated on Samsung's advanced CMOS process, the K6X0808C1D family supports various operating temperature ranges and multiple package types for system design flexibility, according to the manufacturer datasheet. The simple asynchronous interface keeps timing design straightforward: address setup, CE/OE access, and write pulse widths all fall within the 70 ns speed grade budget.
Typical applications include 5 V embedded controllers, industrial equipment retrofits and spare-part repairs, telecom line cards, test and measurement instruments, and buffer memory in legacy 8-bit and 16-bit microprocessor systems that use JEDEC-standard 32K x 8 SRAM footprints.
A key design consideration is power integrity: decouple the 5 V rail with a 0.1 uF ceramic capacitor close to pin 28, and ensure CE is actively driven because deselected standby current is far lower than active current. Avoid floating the control lines during power-up to prevent spurious writes.
This page adds unique value beyond the datasheet by consolidating drop-in alternatives, distributor pricing context, pinout, and practical design notes for sourcing and repair engineers.
Alternativas drop-in para K6X0808C1D-GF70T00 — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com K6X0808C1D-GF70T00 (mesmo formato e footprint) — diferindo em Memory Type, Package, Data Bus Width, Access Time, Organization.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
K6X0808C1D-GF70000
✅ Drop-In✓ Em estoque
$1.1 / unidade
Ver ficha técnica →K6X0808C1D-GF55T00
✅ Drop-In✓ Em estoque
$1.05 / unidade
Ver ficha técnica →K6X0808C1D-BF70T
✅ Drop-In✓ Em estoque
$1.05 / unidade
Ver ficha técnica →K6X0808C1D-BF55
✅ Drop-In✓ Em estoque
$1.85 / unidade
Ver ficha técnica →IS62C256AL-70
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
AS6C256-70SIN
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
K6X0808C1D-GF70T00 Especificações
| Tipo de memória | SRAM - Asynchronous |
| Tamanho da memória | 256 Kbit |
| Organização da memória | 32K x 8 |
| Access Time | 70 ns |
| Interface | Parallel |
| Technology | CMOS |
| Tensão de alimentação | 5 V |
| Tipo de montagem | Surface Mount |
| Encapsulamento | 28-SOP |
| I/O Type | Common Data I/O, TTL compatible |
| Control Signals | CE, OE, WE |
| Clock / Refresh | Fully static, no clock or refresh required |
| Packaging | Tape & Reel (T00 suffix) |
Configuração de pinos do K6X0808C1D-GF70T00
| Pino 1 | A14 — Address input bit 14 |
| Pino 2 | A12 — Address input bit 12 |
| Pino 3 | A7 — Address input bit 7 |
| Pino 4 | A6 — Address input bit 6 |
| Pino 5 | A5 — Address input bit 5 |
| Pino 6 | A4 — Address input bit 4 |
| Pino 7 | A3 — Address input bit 3 |
| Pino 8 | A2 — Address input bit 2 |
| Pino 9 | A1 — Address input bit 1 |
| Pino 10 | A0 — Address input bit 0 |
| Pino 11 | I/O0 — Data input/output bit 0 |
| Pino 12 | I/O1 — Data input/output bit 1 |
| Pino 13 | I/O2 — Data input/output bit 2 |
| Pino 14 | GND — Ground |
| Pino 15 | I/O3 — Data input/output bit 3 |
| Pino 16 | I/O4 — Data input/output bit 4 |
| Pino 17 | I/O5 — Data input/output bit 5 |
| Pino 18 | I/O6 — Data input/output bit 6 |
| Pino 19 | I/O7 — Data input/output bit 7 |
| Pino 20 | CE — Chip enable (active low) |
| Pino 21 | A10 — Address input bit 10 |
| Pino 22 | OE — Output enable (active low) |
| Pino 23 | A11 — Address input bit 11 |
| Pino 24 | A9 — Address input bit 9 |
| Pino 25 | A8 — Address input bit 8 |
| Pino 26 | A13 — Address input bit 13 |
| Pino 27 | WE — Write enable (active low) |
| Pino 28 | VCC — Power supply, 5 V |
Aplicações típicas
K6X0808C1D-GF70T00 é adequado para 6 aplicaçãos: Legacy 5V Embedded Controllers, Industrial Equipment Repair and Sustaining Engineering, Telecom Line Cards and Network Equipment, Test and Measurement Instruments, Battery-Backed Data Retention Modules, Retrofit and Upgrade of 8-bit Microprocessor Boards.
Legacy 5V Embedded Controllers
The K6X0808C1D-GF70T00 fits legacy 5 V microcontroller and microprocessor systems that use the JEDEC 62256-class 32K x 8 SRAM footprint. Its 70 ns access time comfortably supports 8 MHz-class bus timings, and TTL-compatible common I/O lines connect directly to processors such as the 8051, 68HC11, Z80 and early 16-bit MPUs without level shifting. Because the device is fully static, no refresh controller or bus arbitration logic is needed, preserving the original board design. The 28-SOP surface-mount package allows direct reflow onto existing land patterns during board repair or re-manufacture of legacy industrial and telecom controllers.
Recomendado
Industrial Equipment Repair and Sustaining Engineering
PLCs, motor drives, process controllers and CNC equipment from the 1990s and 2000s frequently used 5 V, 32K x 8 asynchronous SRAM such as the K6X0808C1D-GF70T00 for parameter and data storage. When these devices fail, the Samsung part restores form-fit-function without PCB modification. Its fully static CMOS design means the replacement simply drops into the 28-SOP socket or land pattern, and the 70 ns timing matches the original bus budget. Distributors including DigiKey Marketplace and Precision Logic stock the part specifically for repair quantities, making it a sustaining-engineering staple for factory maintenance teams extending machine life.
Recomendado
Telecom Line Cards and Network Equipment
Telecom line cards, channel banks and legacy transmission equipment commonly used 32K x 8 SRAM as frame buffers, lookup tables and configuration memory. The K6X0808C1D-GF70T00's 70 ns access time supports channel-sampled data buffering, while its low CMOS standby current keeps power budgets within card limits when memory banks are deselected via CE. The three-line control interface (CE, OE, WE) allows simple bank selection in multi-chip memory arrays typical of line-card designs. The 28-SOP package withstands standard reflow profiles, supporting card-level rework in network maintenance depots still servicing legacy T1/E1 and PBX hardware.
Recomendado
Test and Measurement Instruments
Oscilloscopes, data loggers, bench power supplies and signal generators of the 5 V generation used asynchronous SRAM for waveform capture buffers and calibration storage. The K6X0808C1D-GF70T00's deterministic 70 ns access time provides consistent read latency across the full operating range, which matters for calibrated timing paths in instruments. Its 32K x 8 organization offers 32 KB of buffer capacity per device, and multiple devices can be CE-decoded in parallel to expand capture depth. Fully static operation eliminates refresh noise that could couple into sensitive analog front ends, preserving measurement integrity in mixed-signal instrument boards.
Recomendado
Battery-Backed Data Retention Modules
In battery-backed memory modules and NVRAM-style assemblies, low standby current is the deciding parameter, and the CMOS K6X0808C1D-GF70T00 addresses this by drawing minimal current when CE is deselected. A backup cell or supercapacitor on the 5 V rail retains SRAM contents through main-power loss, preserving configuration and log data in meters, access controllers and medical equipment. The fully static design tolerates the slowly decaying supply of a discharging battery without corruption, provided CE is actively held high. Designers should verify the datasheet standby specification and size the backup source for the required retention interval.
Recomendado
Retrofit and Upgrade of 8-bit Microprocessor Boards
Retrofitting EPROM-based or DRAM-based memory subsystems with reliable static RAM is a common upgrade path for vintage computers, arcade boards and industrial 8-bit systems. The K6X0808C1D-GF70T00 replaces the classic 62256 SRAM and 28-pin EPROM footprints (with minor WE-line wiring) to eliminate refresh circuitry and improve reliability. Its 70 ns access time meets or exceeds the 150-450 ns timing of the parts it typically replaces, adding timing margin. The 28-SOP package suits both new adapter PCBs and direct surface-mount replacement, and battery-backed circuits can be added for non-volatile behavior.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para K6X0808C1D-GF70T00 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | K6X0808C1D-GF70000 | K6X0808C1D-GF55T00 | K6X0808C1D-BF70T | IS62C256AL-70 | AS6C256-70SIN |
|---|---|---|---|---|---|---|
| Package | 28-SOP | 28-SOP - same | 28-SOP - same | 28-SOP - same | 28-SOP - same footprint | 28-SOP - same footprint |
| Brand | Samsung | Samsung | Samsung | Samsung | ISSI | Alliance Memory |
| Organization | 32K x 8 | 32K x 8 | 32K x 8 | 32K x 8 | 32K x 8 | 32K x 8 |
| Access Time | 70 ns | 70 ns | 55 ns | 70 ns | 70 ns | 70 ns |
| Memory Size | 256 Kbit | 256 Kbit | 256 Kbit | 256 Kbit | 256 Kbit | 256 Kbit |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V |
Principais diferenciais
- Exact legacy form-fit-function (vs IS62C256AL-70)
- Faster timing headroom available in-family (vs K6X0808C1D-BF70T)
- Supply security via same-footprint cross-brand options (vs AS6C256-70SIN)
Notas de projeto
Decouple the 5 V supply with a 0.1 uF ceramic capacitor placed within 5 mm of pin 28 (VCC) and pin 14 (GND); add a 4.7-10 uF bulk capacitor per memory bank on multi-chip boards. Keep address and data traces under 10 cm where possible, and avoid routing WE near clock lines to prevent glitch-coupled writes. For socketed repair work, clean SOP pads thoroughly and verify pin 1 orientation against the dot marker before reflow.
Never allow CE, WE or OE to float during power-up, power-down or processor reset. A floating write-enable can generate spurious write cycles that corrupt memory contents - the most common field failure attributed to 'bad SRAM'. Add a pull-up resistor (typically 10 kohm) on CE and WE so the device stays deselected during bus transitions, and gate WE with the system reset signal in battery-backed designs.
CMOS SRAM active current scales with access rate; standby current is reached only when CE is high. In low-power or battery-backed designs, decode CE so the device is deselected whenever the bus is idle, and avoid resistive pull-downs on data lines that fight the tri-stated outputs. Verify actual standby and active current figures in the Samsung family datasheet before sizing backup cells for retention-critical applications.
Informações de conformidade
Compliance data was not stated in the verified web data retrieved for this legacy part; request RoHS/REACH certificates from the distributor or Samsung before production use.
