47L16-I/ST Microchip Integrated Circuit (Small Outline Packages) In Stock
47L16-I/ST is a 16 Kbit (2 KB) SPI SRAM from Microchip Technology, organized as 2048 × 8 bits with a maximum access time of 400 ns. It operates from a 1.8 V to 5.5 V supply and features byte, page, and sequential read/write modes over a standard SPI interface. Housed in an 8-pin TSSOP package, it provides compact non-volatile-free volatile storage for embedded microcontroller applications.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- 47L16-I/ST Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 16 Kbit (2 KB) SPI SRAM with 2048 × 8 organization
- 1.8 V to 5.5 V supply voltage range for broad MCU compatibility
- Byte, page, and sequential operation modes via SPI interface
- Maximum access time of 400 ns supporting medium-speed MCU buses
- 8-pin TSSOP package for space-constrained PCB layouts
- Unlimited read/write endurance for high-cycle data buffering
Applications
The 47L16-I/ST is used in embedded systems that require small amounts of fast volatile scratch memory accessible over a 2-wire or 4-wire SPI bus, such as data buffering in sensor nodes and wireless communication modules. Its 2 KB capacity suits temporary storage of measurement packets, FIFO queues, and configuration tables in microcontroller designs with limited on-chip RAM. Industrial equipment and consumer appliance controllers also use it for real-time data staging between sampling and transmission events.
Specifications
| Manufacturer Package Code | TSSOP-8 |
| Factory Lead Time | 7Weeks |
| Date Of Intro | 2016-10-10 |
| YTEOL | 18 |
| Access Time-Max | 400ns |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e3 |
| Memory Density | 16384bit |
| Memory IC Type | MEMORY CIRCUIT |
| Memory Width | 8 |
| Mixed Memory Type | EEPROM+SRAM |
| Number of Functions | 1 |
| Number of Ports | 1 |
| Number of Words | 2048words |
| Number of Words Code | 2000 |
| Operating Mode | SYNCHRONOUS |
| Organization | 2KX8 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Supply Voltage-Max (Vsup) | 3.6V |
| Supply Voltage-Min (Vsup) | 2.7V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 40 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.32.00.51 |
| Country of Origin | Philippines, Thailand |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How much storage capacity does the 47L16-I/ST provide, and is it enough for typical sensor data buffers?
The 47L16-I/ST offers 16 Kbit, equivalent to 2 KB of SRAM organized as 2048 × 8 bits. For many sensor nodes that sample at 10–100 Hz with 2–4 bytes per sample, 2 KB can buffer hundreds of readings before a wireless transmission event, making it sufficient for most low-bandwidth IoT data-staging use cases.
Which SPI clock rates does the 47L16-I/ST support, and how does that fit typical 8-bit MCU peripherals?
The device supports SPI clock frequencies up to several megahertz consistent with its 400 ns maximum access time parameter. At 5 MHz SPI clock, a full 2 KB sequential read completes in roughly 3.3 ms. This is well within the speed range of common 8-bit MCUs such as PIC and AVR families running their SPI peripherals at 4–8 MHz.
Does the 47L16-I/ST retain data when power is removed, or is it purely volatile?
The 47L16-I/ST is a volatile SRAM, meaning all stored data is lost when VCC drops below the minimum operating voltage of 1.8 V. Applications that require data retention through power cycles must either combine it with an SPI EEPROM or Flash device, or implement a periodic checkpoint write to non-volatile storage before power-down events occur.
How does the 1.8 V to 5.5 V supply range of the 47L16-I/ST simplify mixed-voltage system designs?
The wide 1.8 V to 5.5 V operating range allows the 47L16-I/ST to connect directly to 1.8 V, 3.3 V, or 5 V MCU SPI buses without level-shifting components. A single part number covers designs from low-power 1.8 V energy-harvested nodes through legacy 5 V industrial controllers, reducing the number of unique SKUs a designer must qualify and stock.
In what package does the 47L16-I/ST ship, and how does it compare to DIP alternatives for prototyping?
The 47L16-I/ST ships in an 8-pin TSSOP package with 0.65 mm pitch, measuring approximately 3 mm × 4.4 mm. Compared to an 8-pin DIP, the TSSOP occupies about 75 percent less board area. For prototyping, an adapter board from TSSOP to 0.1-inch header is commonly used, while production designs benefit from the smaller surface-mount footprint for denser PCBs.
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