My Inquiry
My Account
Renesas IDT71V256SA15PZI
- Part No.:
- IDT71V256SA15PZI
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
IDT71V256SA15PZI.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,183
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
IDT71V256SA15PZI from Renesas Electronics is a 256K (32K × 8-bit) high-speed CMOS static RAM with 15 ns access time, single 3.3 V ±0.3 V supply, LVTTL-compatible I/O, and industrial temperature range (–40°C to +85°C). It serves as secondary cache memory in 3.3 V embedded processor systems requiring low standby power and fast random read/write cycles.
For engineers reviewing the IDT71V256SA15PZI datasheet, IDT71V256SA15PZI pinout, IDT71V256SA15PZI application, or IDT71V256SA15PZI equivalent, key selection criteria include its 15 ns tAA/tACS timing, 2 mA full-standby current (ISB1), TSOP Type I (PZG28) package, and compatibility with 3.3 V LVTTL bus interfaces in space-constrained industrial control and networking hardware.
Technical Context
The IDT71V256SA15PZI implements a fully decoded 15-bit address interface (A0–A14) driving a 262,144-bit memory array with byte-wide bidirectional data I/O (I/O0–I/O7). Its three-state control logic uses independent CS, OE, and WE inputs to manage chip select, output enable, and write enable functions-supporting both CS-controlled and WE-controlled write cycles per JEDEC-standard SRAM timing protocols.
It operates exclusively on a single 3.3 V supply with VIH/VIL thresholds aligned to LVTTL levels (VIH ≥ 2.0 V, VIL ≤ 0.8 V), and guarantees full standby power consumption of ≤2 mA when CS is held at CMOS-high level (VHC = VCC – 0.2 V) with no input toggling (f = 0).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 8-bit (262,144 bits), enabling byte-aligned random access without external data masking |
| Access Time (tAA) | 15 ns max - supports CPU bus cycles up to ~66.7 MHz in burst-read configurations |
| Supply Voltage | 3.3 V ±0.3 V - compatible with standard 3.3 V LVTTL logic rails and eliminates need for dual-supply design |
| Standby Current (ISB1) | 2 mA max at full standby (CS = VHC, f = 0) - extends battery life in portable industrial controllers |
| I/O Interface | LVTTL-compatible inputs/outputs - ensures direct connection to 3.3 V microcontrollers and FPGAs without level-shifting |
| Operating Temperature | –40°C to +85°C - qualified for deployment in uncontrolled industrial environments including factory automation nodes |
| Package | 28-pin TSOP Type I (PZG28), 8.1 mm × 13.4 mm footprint - enables high-density PCB layouts in compact networking modules |
Pinout & Package
Package: 28-pin TSOP Type I (PZG28), 8.1 mm × 13.4 mm body, 0.55 mm pitch, surface-mount, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Inputs | 15-bit address bus accepting parallel address values for row/column decoding of 32K locations |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit data path supporting simultaneous read output or write input under OE/WE/CS control |
| CS | Chip Select | Active-low enable that places device in standby (high-Z I/O) when HIGH; primary chip-level gating signal |
| WE | Write Enable | Active-low control determining write cycle initiation during CS LOW; defines data capture window with tWP ≥10 ns |
| OE | Output Enable | Active-low signal enabling output drivers only during read cycles; decouples read timing from write control |
| VCC | Power Supply | Single 3.3 V supply pin; must be decoupled locally to meet AC noise immunity requirements per datasheet layout guidelines |
| GND | Ground Reference | Common return path for all digital signals and internal core logic; requires low-inductance PCB connection |
Key Features
| Feature | Design Value |
|---|---|
| Low-power standby mode | Guaranteed ISB1 ≤ 2 mA at full standby enables >10-year battery-backed operation in remote sensor gateways |
| Fast 15 ns random access | tAA = 15 ns allows seamless integration into 3.3 V RISC processor secondary cache subsystems without wait states |
| Industrial temperature rating | –40°C to +85°C operation verified across voltage and timing margins supports deployment in motor drives and PLCs |
| LVTTL-compatible signaling | VIH ≥ 2.0 V / VIL ≤ 0.8 V thresholds ensure interoperability with standard 3.3 V FPGA I/O banks and MCU GPIOs |
| TSOP Type I packaging | PZG28 footprint reduces board area by 40% vs. SOJ while maintaining reflow-solder compatibility for automated assembly |
Applications
| Industrial PLC Memory Buffer | Network Switch Packet Buffer |
|---|---|
Use Scenario: Storing real-time I/O status and program variables in programmable logic controllers operating in factory-floor environments. IC Role / Device Role / Timing Role: Non-volatile shadow RAM buffer holding configuration data and runtime variables between scan cycles. Use Value: 15 ns tAA and 2 mA ISB1 allow deterministic response within 1 ms scan cycles while minimizing thermal load in sealed enclosures. | Use Scenario: Temporary storage of Ethernet frames in Layer 2 switching ASICs requiring low-latency, byte-accessible buffering. IC Role / Device Role / Timing Role: High-speed packet buffer interfacing directly to 3.3 V switch fabric controllers via parallel LVTTL bus. Use Value: LVTTL compatibility and 15 ns access time eliminate glue logic, reducing BOM count and PCB layer count in 1U switch designs. |
| Medical Imaging Control Cache | Avionics Data Logger Buffer |
Use Scenario: Caching calibration tables and real-time sensor fusion parameters in portable ultrasound and MRI control units. IC Role / Device Role / Timing Role: Secondary cache for ARM-based imaging processors executing time-critical DSP kernels. Use Value: Industrial temperature range and 3.3 V single supply simplify power architecture and meet IEC 60601-1 thermal safety limits. | Use Scenario: Capturing flight telemetry and sensor logs in airborne data acquisition systems subject to wide ambient temperature swings. IC Role / Device Role / Timing Role: Buffered write-through memory staging raw ADC samples before compression and transmission. Use Value: Full-standby ISB1 ≤ 2 mA extends operational duration on backup batteries during extended ground checks or emergency power modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY62128EV30LL-45ZAXI | 45 ns access time, 5 V tolerant I/O, 32K × 8 organization, same PZG28 package | Designed for legacy 5 V systems; lacks LVTTL optimization and 3.3 V-only efficiency | Select only if migrating from 5 V infrastructure where voltage translation is impractical |
| AS6C4008-15PIN | 15 ns access, 3.3 V supply, 512K × 8 organization, 32-pin SOP package | Doubles memory depth but increases footprint and requires PCB redesign | Choose when system firmware requires >256 KB cache and board layout permits larger package |
Compared with CY62128EV30LL-45ZAXI and AS6C4008-15PIN, the IDT71V256SA15PZI delivers optimal balance of speed, power, and footprint for new 3.3 V industrial designs-offering 15 ns performance in the smallest TSOP package without compromising industrial temperature reliability or LVTTL bus integrity.
Availability
IDT71V256SA15PZI is available at Aetrix Electronics and suitable for industrial PLCs, network switches, medical imaging controllers, and avionics data loggers requiring stable component supply across extended product lifecycles.
Supply support for IDT71V256SA15PZI 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
Renesas Electronics Corporation is a global semiconductor leader delivering trusted embedded solutions for automotive, industrial, infrastructure, and IoT applications.
The IDT71V256SA15PZI belongs to Renesas' legacy high-speed CMOS SRAM product line, engineered specifically for low-latency, low-power memory buffering in 3.3 V processor subsystems deployed in harsh environmental conditions.
FAQ
What is the maximum guaranteed access time for IDT71V256SA15PZI?
The IDT71V256SA15PZI has a maximum guaranteed address access time (tAA) of 15 ns under industrial temperature conditions (–40°C to +85°C) and 3.3 V ±0.3 V supply. This value is production-tested and specified in the AC Electrical Characteristics table of the Renesas datasheet revision Jun.02.20. The IDT71V256SA15PZI achieves this timing without requiring external wait-state insertion in compatible 3.3 V bus architectures.
Does IDT71V256SA15PZI support true static operation without refresh?
Yes, the IDT71V256SA15PZI is a true static RAM and requires no refresh cycles. Its CMOS memory cell design retains data indefinitely as long as VCC remains within specification and CS is not asserted to disable the array. This eliminates refresh overhead in microcontroller-based systems and simplifies firmware design for the IDT71V256SA15PZI in real-time deterministic applications.
What is the standby current specification for IDT71V256SA15PZI in full-standby mode?
The IDT71V256SA15PZI guarantees a full-standby supply current (ISB1) of ≤2 mA when CS is held at CMOS-high level (VHC = VCC – 0.2 V), all inputs are static (f = 0), and outputs are in high-impedance state. This specification applies across the full industrial temperature range and is validated per the DC Electrical Characteristics table in the official Renesas datasheet for IDT71V256SA15PZI.
Is IDT71V256SA15PZI pin-compatible with other speed grades in the same family?
Yes, the IDT71V256SA15PZI shares identical pinout, package (PZG28 TSOP Type I), and signal definitions with IDT71V256SA12PZI and IDT71V256SA20PZI. All variants use the same A0–A14, I/O0–I/O7, CS, WE, OE, VCC, and GND assignments. This allows direct speed-grade substitution on existing PCBs without layout changes, provided timing margins accommodate the selected access time.
What does the 'I' suffix in IDT71V256SA15PZI indicate?
The 'I' suffix in IDT71V256SA15PZI denotes Industrial temperature grade (–40°C to +85°C), as defined in the Renesas ordering information. It confirms that the IDT71V256SA15PZI is fully characterized and tested across this extended range for all DC and AC parameters-including access time, standby current, and I/O voltage thresholds-making it suitable for deployment in non-climate-controlled industrial and transportation equipment.
IDT71V256SA15PZI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 28-TSSOP (0.465", 11.80mm 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:
- 15ns
- Access Time:
- 15 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSOP
IDT71V256SA15PZI FAQ
1.How can I place an order for IDT71V256SA15PZI through Aetrix?
Please submit a Request for Quotation (RFQ) for IDT71V256SA15PZI 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 IDT71V256SA15PZI reliable?
The price and inventory of IDT71V256SA15PZI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IDT71V256SA15PZI is usually 5 days.
3.What payment methods are accepted for IDT71V256SA15PZI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IDT71V256SA15PZI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IDT71V256SA15PZI?
IDT71V256SA15PZI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IDT71V256SA15PZI 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 IDT71V256SA15PZI?
For technical support, including IDT71V256SA15PZI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IDT71V256SA15PZI requirements.
6.How does Aetrix verify that IDT71V256SA15PZI is sourced from the original manufacturer or authorized distributors?
All IDT71V256SA15PZI 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 IDT71V256SA15PZI meets industry standards.
7.What is the process for return or replacement of IDT71V256SA15PZI?
All IDT71V256SA15PZI units undergo pre-shipment inspection (PSI). If there is an issue with IDT71V256SA15PZI, 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 IDT71V256SA15PZI part is unused and in its original packaging.
Return procedure for IDT71V256SA15PZI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IDT71V256SA15PZI 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
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
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…
