DescriptionThe AT76C557 is designed as one kind of single chip controller that a cost effective networking solution in conjunction with a 2.4 GHz transceiver. And this device is comprised of a baseband processor. This processor carries out all bit-level processing after modulation / demodulation of the Bluetooth bitstream. Also this device can be used in wide range of applications such as (1)Wireless network cards; (2)Mobile phones; (3)Laptop and desktop computers; (4)Pagers; (5)Digital cameras; (6)PDAs; (7)Wireless computer peripherals (printers, etc.).
Features of the AT76C557 are:(1)Glueless SRAM Interface, Supporting Up to 256K Bytes of Memory; (2)Glueless Flash Memory Interface, Supporting Up to 256K Bytes of Nonvolatile Memory; (3)Glueless PCMCIA Bus Interface Conforming to PC Card Standard ?Feb. 1995; (4)USB Interface Conforming to Universal Serial Bus Standard Version 1.1; (5)16550 UART Core Offering 32-byte Receive FIFO and Programmable Baud Rate; (6)Programmable 8/16-bit Wide External Memory Interface; (7)Supports Multiple Reference Clock Frequencies (13.000, 14.400, 16.800, 19.440 MHz); (8)176-lead LQFP; (9)3.3V Supply.
The absolute maximum ratings of the AT76C557 can be summarized as:(1)DC Supply Voltage: -0.3 to 3.6 V;(2)DC Input Voltage: -0.3 to VDD+0.3 V;(3)DC Output Voltage: -0.3 to VDD+0.3 V;(4)Operating Free Air Temperature Range: -40 to +85 °C;(5)Storage Temperature: -60 to +150 °C.
The electrical characteristics of this device can be summarized as:(1)Power Supply: 3.3 V;(2)Supply Current: 50 mA;(3)Suspended Device Current: 200 A;(4)High-Z Data Line Leakage: -10 to +10 A;(5)Differential Input Sensitivity: 0.2 V;(6)Differential Common Mode Range: 0.8 to 2.5 V;(7)Single Ended Receiver Threshold: 0.8 to 2.0 V;(8)Output Signal Crossover: 1.3 to 2.0 V;(9)Static Output Low: 0.3 V. If you want to know more information about the AT76C557, please download the datasheet in www.seekic.com or www.chinaicmart.com .
AT76C557 Data Sheet
