My Inquiry
My Account
Renesas 70V27L20PF
- Part No.:
- 70V27L20PF
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
70V27L20PF.pdf
- Description:
- IC SRAM 512KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,449
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
IDT70V27L20PF from Integrated Device Technology (IDT) is a high-speed, low-power 32K × 16 dual-port static RAM with true independent left/right port access, 20 ns maximum access time (industrial grade), 3.3 V single-supply operation, and on-chip semaphore/arbiration logic - used in real-time inter-processor communication, FPGA co-processor buffering, and legacy bus bridging applications.
For engineers reviewing the IDT70V27L20PF datasheet, IDT70V27L20PF pinout, IDT70V27L20PF application, or IDT70V27L20PF equivalent, key selection considerations include simultaneous dual-port read/write capability, BUSY/INT flag timing under M/S master/slave configuration, 100-pin TQFP package compatibility, and standby current of 660 µW (typ.) in full CMOS-disable mode.
Technical Context
The IDT70V27L20PF implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port - enabling concurrent read/write to identical memory locations without external arbitration logic. Its on-chip port arbitration uses address-match and chip-enable priority detection with programmable BUSY assertion timing (tBAA ≤ 20 ns).
It supports MASTER/SLAVE cascading via M/S pin for 32-bit+ data width expansion, with dedicated semaphore registers (8 flags, addressed by A0–A2) and interrupt generation triggered by writes to fixed mailbox addresses (e.g., 7FFEH for INTL). All I/Os are LVTTL-compatible with 3.3 V ±0.3 V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 16 bits (512 Kbit total), dual-port SRAM with independent left/right address spaces |
| Access Time (max) | 20 ns - guarantees deterministic read latency for real-time inter-processor handshaking |
| Supply Voltage | 3.3 V ±0.3 V - compatible with modern low-voltage logic families; no level-shifting required |
| Standby Current (ISB3) | 660 µW (typ.) - enables ultra-low-power hold mode when both ports fully disabled (CMOS-level inputs) |
| Operating Temperature | −40°C to +85°C - qualified for industrial embedded systems including motor control and telecom line cards |
| Package | 100-pin Thin Quad Flatpack (TQFP), 14 mm × 14 mm body - standard surface-mount footprint with thermal pad option |
| Bus Width Support | 16-bit per port; expandable to 32-bit+ via Master/Slave daisy-chain using M/S and BUSY signals |
Pinout & Package
Package: 100-pin TQFP (PN100-1), 14 mm × 14 mm × 1.4 mm body, lead finish SnPb (EOL as of June 2018).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE0L, CE1L / CE0R, CE1R | Chip Enable (Left/Right) | Independent TTL/CMOS-selectable enable per port; controls active/standby power state |
| R/WL, R/WR | Read/Write Control | Active-low bidirectional direction control - determines I/O driver state during access |
| OEL, OER | Output Enable | Tri-states I/O drivers independently per port; enables shared-bus contention-free operation |
| A0L–A14L / A0R–A14R | Address Inputs | 15-bit address per port (32K depth); supports simultaneous access to same or different locations |
| I/O0L–I/O15L / I/O0R–I/O15R | Data I/O | 16-bit bidirectional data bus per port; upper/lower byte control (UBL/LBL, UBR/LBR) enables 8-bit sub-access |
| SEML, SEMR | Semaphore Enable | Activates 8-flag semaphore register bank (addressed by A0–A2); enables inter-port synchronization |
| INTL, INTR | Interrupt Flag Output | Open-drain compatible (push-pull), asserted on write to mailbox address (e.g., 7FFEH) |
| BUSYL, BUSYR | Arbitration Flag | Push-pull output (Master) or input (Slave); blocks write when asserted - resolves port-to-port contention |
| M/S | Master/Slave Select | Configures device role: VIH = Master (BUSY output), VIL = Slave (BUSY input); enables cascaded systems |
| VDD, VSS | Power/Ground | Single 3.3 V supply; all VDD/VSS pins must be connected - decoupling critical for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Enables simultaneous, independent read/write to identical memory locations - eliminates software polling or external arbitration logic |
| On-Chip Semaphore Logic | Eight hardware semaphore flags accessible via A0–A2; supports atomic lock/unlock across ports without CPU intervention |
| Master/Slave Cascading | Uses M/S pin and BUSY handshake to chain multiple devices for 32-bit+ data paths - no external glue logic required |
| Ultra-Low Standby Power | 660 µW typical ISB3 current enables battery-backed or energy-sensitive industrial applications |
| Full Asynchronous Operation | No clock required - simplifies timing closure in mixed-signal or heterogeneous processor systems (e.g., DSP + MCU) |
| LVTTL-Compatible I/O | 3.3 V interface with VIH ≥ 2.0 V, VIL ≤ 0.8 V - interoperable with FPGA I/O banks and microcontroller GPIOs |
Applications
| Industrial PLC Communication Buffer | FPGA-CPU Co-Processor Interface |
|---|---|
|
Use Scenario: Real-time data exchange between PLC main controller (left port) and field I/O module processor (right port) with deterministic latency. IC Role / Device Role / Timing Role: Dual-port SRAM acts as synchronized mailbox - left port writes sensor data, right port reads and processes; BUSY flags prevent race conditions. Use Value: Eliminates need for external FIFO or arbitration IC; 20 ns access ensures sub-microsecond response for motion control loops. |
Use Scenario: High-bandwidth streaming between Xilinx Zynq PS (ARM) and PL (FPGA) domains over AXI-lite or custom parallel bus. IC Role / Device Role / Timing Role: Acts as zero-wait-state buffer with independent address spaces - PS writes command packets, PL reads and executes in parallel. Use Value: Enables lock-step synchronization via semaphores; avoids AXI protocol overhead and reduces FPGA logic utilization. |
| Legacy Bus Bridge (VME/PCI) | Digital Signal Processing Pipeline |
|
Use Scenario: Bridging 16-bit VMEbus (left port) to modern 32-bit PCI Express endpoint (right port) in test equipment backplane. IC Role / Device Role / Timing Role: Memory-mapped interface with M/S cascading - two IDT70V27L20PF units form 32-bit wide bridge with automatic byte-enable alignment. Use Value: Maintains legacy system compatibility while supporting >100 MB/s throughput; eliminates custom ASIC development. |
Use Scenario: Staging filter coefficients and intermediate results between successive DSP stages (e.g., FFT → windowing → IFFT) in radar signal chain. IC Role / Device Role / Timing Role: Dual-port RAM serves as ping-pong buffer - one port feeds current stage, other port loads next-stage data concurrently. Use Value: Achieves continuous processing at 50+ MSPS; 660 µW standby power extends runtime in portable RF analyzers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Cypress CY7C028V-20AC | 32K × 16, 20 ns, 3.3 V, but uses 3-state BUSY outputs and lacks integrated semaphore logic | Requires external logic for semaphore emulation; less suitable for tightly coupled inter-processor sync | Prefer when only basic dual-port access is needed and board space allows discrete arbitration circuitry |
| Renesas R1EX24032AS0C-20#U0 | 32K × 16, 20 ns, 3.3 V, supports JTAG debug interface and has wider industrial temp range (−40°C to +105°C) | Includes built-in boundary-scan support; better suited for high-reliability automotive diagnostics modules | Choose for AEC-Q100-compliant designs where extended temperature margin and testability are mandatory |
Compared with CY7C028V-20AC and R1EX24032AS0C-20#U0, the IDT70V27L20PF delivers integrated semaphore/arbiration and lower standby power (660 µW vs. ≥1.2 mW), making it optimal for resource-constrained industrial controllers requiring atomic inter-process signaling without firmware overhead.
Availability
IDT70V27L20PF is available at Aetrix Electronics and suitable for industrial PLCs, FPGA co-processor interfaces, and legacy bus bridge designs requiring stable component supply, long-lifecycle support, and verified dual-port timing behavior.
Supply support for IDT70V27L20PF 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
Integrated Device Technology (IDT), now part of Renesas Electronics, is a fabless semiconductor company specializing in timing, memory interface, and RF power solutions for communications, computing, and industrial markets.
The IDT70V27L20PF belongs to IDT's high-performance dual-port SRAM product line, designed specifically for deterministic, low-latency inter-processor communication in real-time embedded systems where software-managed buffers introduce unacceptable jitter.
FAQ
What is the guaranteed maximum access time for IDT70V27L20PF across its full industrial temperature range?
The IDT70V27L20PF guarantees a maximum access time of 20 ns over −40°C to +85°C. This value is specified for tAA (address access time), tACE (chip enable access time), and tABE (byte enable access time) under worst-case voltage (3.0 V) and temperature conditions, ensuring deterministic timing for hard real-time applications.
How does the M/S pin affect BUSY signal behavior in IDT70V27L20PF?
When M/S = VIH, IDT70V27L20PF operates as a Master: BUSYL and BUSYR are push-pull outputs that assert to block conflicting writes. When M/S = VIL, it operates as a Slave: BUSYL and BUSYR become inputs that must be driven externally to inhibit writes - enabling hierarchical arbitration in multi-device systems.
Can IDT70V27L20PF support byte-wide accesses, and how is this implemented?
Yes - IDT70V27L20PF supports independent upper- and lower-byte access via UBL/LBL (left port) and UBR/LBR (right port). Setting UB=LOW and LB=HIGH enables write/read to I/O8–I/O15 only; LB=LOW and UB=HIGH targets I/O0–I/O7. This allows seamless integration with 8-bit peripherals without data masking logic.
What is the minimum pulse width required for reliable semaphore flag updates in IDT70V27L20PF?
IDT70V27L20PF requires a minimum SEM flag update pulse width (tSOP) of 10 ns for 20 ns speed grade devices. This ensures proper latching of I/O0 into the selected semaphore register (A0–A2 decoded) and is validated across voltage (3.0–3.6 V) and temperature (−40°C to +85°C) ranges per datasheet Table 12a.
Is IDT70V27L20PF pin-compatible with earlier IDT70V27S variants, and what are the key electrical differences?
IDT70V27L20PF is pin-compatible with IDT70V27S20PF, sharing identical 100-pin TQFP footprint and signal mapping. Key differences: IDT70V27L20PF offers 660 µW typical standby current (vs. 3.3 mW for S-grade) and tighter ISB1/ISB2 current specs - optimized for always-on industrial systems where power efficiency is critical.
70V27L20PF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 100-LQFP
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Asynchronous
- Memory Size:
- 512Kbit
- Memory Organization:
- 32K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 20ns
- Access Time:
- 20 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-TQFP (14x14)
70V27L20PF FAQ
1.How can I place an order for 70V27L20PF through Aetrix?
Please submit a Request for Quotation (RFQ) for 70V27L20PF 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 70V27L20PF reliable?
The price and inventory of 70V27L20PF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V27L20PF is usually 5 days.
3.What payment methods are accepted for 70V27L20PF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V27L20PF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 70V27L20PF?
70V27L20PF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 70V27L20PF 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 70V27L20PF?
For technical support, including 70V27L20PF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V27L20PF requirements.
6.How does Aetrix verify that 70V27L20PF is sourced from the original manufacturer or authorized distributors?
All 70V27L20PF 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 70V27L20PF meets industry standards.
7.What is the process for return or replacement of 70V27L20PF?
All 70V27L20PF units undergo pre-shipment inspection (PSI). If there is an issue with 70V27L20PF, 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 70V27L20PF part is unused and in its original packaging.
Return procedure for 70V27L20PF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
70V27L20PF 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…
