2 DS4550 I C and JTAG Nonvolatile 9-Bit I/O Expander Plus Memory General Description Benefits and Features The DS4550 is a 9-bit, nonvolatile (NV) I/O expander Programmable Replacement for Mechanical Jumpers with 64 bytes of NV user memory controlled by either an and Switches 2 I C-compatible serial interface or JTAG port. The DS4550 Nine NV Inputs/Outputs offers a digitally programmable alternative to hardware 64-Byte NV User Memory (EEPROM) jumpers and mechanical switches that are being used to 2 I C-Compatible Serial Interface and JTAG control digital logic nodes. Each I/O pin is independently configurable. The outputs are open-drain with selectable Up to 8 Devices can be Multidropped on the Same pullups. Each output has the ability to sink up to 16mA, 2 I C Bus and since the device is NV, it powers up in the desired Open-Drain Outputs with Configurable Pullups state allowing it to control digital logic inputs immediately Outputs Capable of Sinking 16mA on powerup without having to wait for the host CPU to initiate control. Low Power Consumption Wide Operating Voltage Range: 2.7V to 5.5V Applications Operating Temperature Range: -40C to +85C RAM-Based FPGA Bank Switching for Multiple Profiles Selecting Between Boot Flash Ordering Information Setting ASIC Configurations/Profiles Servers PART TEMP RANGE PIN-PACKAGE Network Storage DS4550E -40C to +85C 20 TSSOP Routers Add /T&R for tape and reel orders. Telecom Equipment PC Peripherals Pin Configuration Typical Operating Circuit TOP VIEW V CC I/O 0 1 20 GND 0.1F I/O 1 2 19 I/O 8 DS4550 I/O 2 3 18 I/O 7 V CC I/O 0 I/O 3 4 17 I/O 6 A0 I/O 1 FPGA DS4550 A1 I/O 2 I/O 4 5 16 I/O 5 4.7k A2 I/O 3 A0 6 15 A2 GND I/O 4 CLOCK GENERATOR I/O 5 A1 7 14 TDO 2 SCL I C I/O 6 CPU SPEED TCK 8 13 TDI INTERFACE SDA I/O 7 SELECT TCK I/O 8 TMS 9 12 SCL TMS JTAG V 10 11 SDA INTERFACE CC TDI TDO TSSOP 19-8356 Rev 1 7/172 DS4550 I C and JTAG Nonvolatile 9-Bit I/O Expander Plus Memory Absolute Maximum Ratings Voltage on V , SDA, and SCL Pins EEPROM Programming Temperature Range ........0C to +70C CC Relative to Ground............................................-0.5V to +6.0V Storage Temperature Range ............................ -55C to +125C Voltage on A0, A1, A2, TCK, TMS, TDI, and I/O n n = 0 to 8 Soldering Temperature ................... See IPC/JEDEC J-STD-020 Relative to Ground..................................-0.5V to V + 0.5V, Specification CC not to exceed +6.0V. Operating Temperature Range ........................... -40C to +85C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Recommended DC Operating Conditions (T = -40C to +85C) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage V (Note 1) +2.7 +5.5 V CC 0.7 x V + CC Input Logic 1 V V IH V 0.3 CC 0.3 x Input Logic 0 V -0.3 V IL V CC DC Electrical Characteristics (V = +2.7V to +5.5V, T = -40C to +85C, unless otherwise noted.) CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Standby Current I (Note 2) 2 10 A STBY Input Leakage I -1.0 +1.0 A L Input Current each I/O pin I 0.4 < V < 0.9 x V -1.0 +1.0 A I/O I/O CC 3mA sink current 0.4 Low-Level Output Voltage V V OL SDA (SDA) 6mA sink current 0.6 I/O Pins Low-Level Output V 16mA sink current 0.4 V OL I/O Voltage Low-Level Output Voltage (TDO) V 4mA sink current 0.4 V OL TDO High-Level Output Voltage V 1mA source current 2.4 V OH TDO (TDO) I/O Pin Pullup Resistors R 4.0 5.5 7.5 k PU TMS, TDI Pullup Resistors R 7.5 10 12.5 k JPU I/O Capacitance C (Note 3) 10 pF I/O Power-On Reset Voltage V 1.6 V POR Maxim Integrated 2 www.maximintegrated.com