
PCF8570
256 x 8-bit static low-voltage RAM with I2C-bus interface
The PCF8570 is a low power static CMOS RAM, organized as 256 words by 8-bits.
Addresses and data are transferred serially via a two-line bidirectional bus (I²C-bus). The built-in word address register is incremented automatically after each written or read data byte. Three address pins, A0, A1 and A2 are used to define the hardware address, allowing the use of up to 8 devices connected to the bus without additional hardware.

| Type number | Orderable part number | Ordering code (12NC) | Product status | Package | Packing | Marking |
|---|---|---|---|---|---|---|
| PCF8570T/F5 | PCF8570T/F5,512 | 9351 549 20512 | Volume production | SOT176-1 (SO8) | Tube Dry Pack | Standard Marking |
| PCF8570T/F5 | PCF8570T/F5,518 | 9351 549 20518 | Volume production | SOT176-1 (SO8) | Reel Dry Pack, SMD, 13" | Standard Marking |
| Package Version | Package Name | Package Description | Reference Codes | Issue Date |
|---|---|---|---|---|
| SOT176-1 | SO8 | plastic small outline package; 8 leads; body width 7.5 mm | 2003-02-19 |
| Type number | Orderable part number | Chemical content | RoHS | Leadfree conversion date | RHF | IFR (FIT) | MTBF (hours) | MSL | MSL LF |
|---|---|---|---|---|---|---|---|---|---|
| PCF8570T/F5 | PCF8570T/F5,512 | PCF8570T/F5 | week 5, 2005 | 2 | 2 | ||||
| PCF8570T/F5 | PCF8570T/F5,518 | PCF8570T/F5 | week 5, 2005 | 2 | 2 |
| File name | Title | Type | Format | Date |
|---|---|---|---|---|
| PCF8570 | 256 x 8-bit static low-voltage RAM with I2C-bus interface | Data sheet | 1999-01-06 | |
| AN10216 | I2C manual | Application note | 2003-03-27 | |
| 75016020 | Low-power GPIO expanders for portable applications; NXP 8/16-bit I2C/SMBus GPIO expanders PCA9534/35/35C for low-power applications | Leaflet | 2007-06-01 | |
| 75016535 | Versatile, easy-to-use GPIO expanders; NXP 4/8/16-bit I2C/SMBus GPIO expanders PCA9536/54/54A/55 | Leaflet | 2008-08-01 | |
| 75017424 | NXP I2C-bus solutions 2013: Smart, simple solutions for the 12 most common design concerns | Leaflet | 2013-05-23 | |
| design_con_2003_tecforum_i2c_bus_overview | DesignCon 2003 TecForum I 2 C Bus Overview | Other type | 2003-01-27 | |
| 39340011 | I2C-bus specification (version 2.1) | Other type | 2000-01-01 | |
| UM10204 | I2C-bus specification and user manual | User manual | 2007-06-26 | |
| UM10206 | I2C Demonstration Board 2005-1 Quick Start Guide | User manual | 2006-06-13 |
| Type number | Ordering code (12NC) | Orderable part number | Region | Distributor | In stock | Order quantity | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|---|
| PCF8570T/F5 | 9351 549 20512 | PCF8570T/F5,512 | EU | AVNET EXPRESS EUROPE | 10,560 | 5/24/2013 | Not available | ||
| EU | ARROW EUROPE | 2,149 | 5/24/2013 | ||||||
| NA | AVNET EXPRESS AMERICAS | 1,645 | 5/24/2013 | ||||||
| NA | Newark element14 | 836 | 1 | 5/24/2013 | |||||
| NA | FUTURE ELECTRONICS | 512 | 5/23/2013 | ||||||
| EU | FUTURE ELECTRONICS UK | 512 | 5/23/2013 | ||||||
| ASIA | FUTURE ELECTRONICS- ASIA | 512 | 5/23/2013 | ||||||
| NA | ARROW ELECTRONICS | 307 | 5/24/2013 | ||||||
| JAPAN | CHIP ONE STOP | 4 | 05/24/2013 | ||||||
| PCF8570T/F5 | 9351 549 20518 | PCF8570T/F5,518 | NA | FUTURE ELECTRONICS | 2,000 | 5/23/2013 | |||
| EU | FUTURE ELECTRONICS UK | 2,000 | 5/23/2013 | ||||||
| ASIA | FUTURE ELECTRONICS- ASIA | 2,000 | 5/23/2013 | ||||||
| NA | DIGI-KEY CORPORATION | 1,997 | 5/24/2013 | ||||||
| ASIA | WPI | 1,000 | 1000 | 05/24/2013 | |||||
| NA | MOUSER ELECTRONICS | 710 | 5/24/2013 | ||||||
| JAPAN | CHIP ONE STOP | 20 | 05/24/2013 |
Sample orders normally take 2-4 days for delivery.
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