PCA9557 www.ti.com.................................................................................................................................................... SCPS133I – DECEMBER 2005 – REVISED JUNE 2008 REMOTE 8-BIT I2C AND SMBus LOW-POWER I/O EXPANDER WITH RESET AND CONFIGURATION REGISTERS FEATURES 1 • • • • • • • • • RGV PACKAGE (TOP VIEW) 14 13 12 11 10 9 RESET RGY PACKAGE (TOP VIEW) 16 15 14 13 A0 A1 A2 P0 1 2 3 12 11 10 9 4 5 6 7 8 P7 P6 P5 P4 SDA A0 A1 A2 P0 P1 2 3 4 5 6 7 1 16 15 14 13 12 11 9 10 8 GND RESET P7 P6 P5 P4 P3 P2 P3 6 7 8 VCC 15 P2 4 5 16 GND 1 2 3 P1 SCL SDA A0 A1 A2 P0 P1 GND SDA SCL VCC D, DB, DGV, OR PW PACKAGE (TOP VIEW) VCC • • • Internal Power-On Reset High-Impedance Open Drain on P0 Power Up With All Channels Configured as Inputs No Glitch on Power Up Noise Filter on SCL/SDA Inputs Latched Outputs With High Current Drive Maximum Capability for Directly Driving LEDs Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II ESD Protection Exceeds JESD 22 – 2000-V Human-Body Model (A114-A) – 200-V Machine Model (A115-A) – 1000-V Charged-Device Model (C101) RESET P7 P6 P5 P4 P3 P2 • • • • • Low Standby Current Consumption of 1 µA Max I2C to Parallel Port Expander Operating Power-Supply Voltage Range of 2.3 V to 5.5 V 5-V Tolerant I/O Ports 400-kHz Fast I2C Bus Three Hardware Address Pins Allow for Use of up to Eight Devices on I2C/SMBus Lower-Voltage Higher-Performance Migration Path for PCA9556 Input/Output Configuration Register Polarity Inversion Register Active-Low Reset Input SCL • DESCRIPTION/ORDERING INFORMATION This 8-bit I/O expander for the two-line bidirectional bus (I2C) is designed for 2.3-V to 5.5-V VCC operation. The device provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface [serial clock (SCL) and serial data (SDA)]. The PCA9557 consists of one 8-bit configuration (input or output selection), input port, output port, and polarity inversion (active-high) registers. At power on, the I/Os are configured as inputs. However, the system master can enable the I/Os as either inputs or outputs by writing to the I/O configuration bits. The data for each input or output is kept in the corresponding input or output register. The polarity of the input port register can be inverted with the polarity inversion register. All registers can be read by the system master. The device outputs (latched) have high-current drive capability for directly driving LEDs. The device has low current consumption. 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2005–2008, Texas Instruments Incorporated PCA9557 SCPS133I – DECEMBER 2005 – REVISED JUNE 2008.................................................................................................................................................... www.ti.com DESCRIPTION/ORDERING INFORMATION (CONTINUED) The system master can reset the PCA9557 in the event of a timeout or other improper operation by asserting a low in the active-low reset (RESET) input. The power-on reset puts the registers in their default state and initializes the I2C/SMBus state machine. Asserting RESET causes the same reset/initialization to occur without depowering the part. Three hardware pins (A0, A1, and A2) are used to program and vary the fixed I2C address, allowing up to eight devices to share the same I2C bus or SMBus. ORDERING INFORMATION PACKAGE (1) (2) TA PCA9557RGVR PD557 QFN – RGY Reel of 1000 PCA9557RGYR PD557 Reel of 2500 PCA9557DR Reel of 250 PCA9557DT Tube of 40 PCA9557D Reel of 2000 PCA9557DBR Tube of 80 PCA9557DB Reel of 2000 PCA9557PWR Reel of 250 PCA9557PWT Tube of 90 PCA9557PW Reel of 2000 PCA9557DGVR SSOP – DB TSSOP – PW TVSOP – DGV (1) (2) TOP-SIDE MARKING Reel of 2000 SOIC – D –40°C to 85°C ORDERABLE PART NUMBER QFN – RGV PCA9557 PD557 PD557 PD557 Package drawings, thermal data, and symbolization are available at www.ti.com/packaging. For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI website at www.ti.com. TERMINAL FUNCTIONS NO. 2 QFN (RGY) SOIC (D), SSOP (DB), TSSOP (PW), AND TVSOP (DGV) QFN (RGV) 1 15 SCL Serial clock bus. Connect to VCC through a pullup resistor. 2 16 SDA Serial data bus. Connect to VCC through a pullup resistor. 3 1 A0 Address input. Connect directly to VCC or ground. 4 2 A1 Address input. Connect directly to VCC or ground. 5 3 A2 Address input. Connect directly to VCC or ground. 6 4 P0 P-port input/output. High impedance open-drain design structure. Connect to VCC through a pullup resistor. 7 5 P1 P-port input/output. Push-pull design structure. 8 6 GND NAME DESCRIPTION Ground 9 7 P2 P-port input/output. Push-pull design structure. 10 8 P3 P-port input/output. Push-pull design structure. 11 9 P4 P-port input/output. Push-pull design structure. 12 10 P5 P-port input/output. Push-pull design structure. 13 11 P6 P-port input/output. Push-pull design structure. 14 12 P7 P-port input/output. Push-pull design structure. 15 13 RESET 16 14 VCC Active-low reset input. Connect to VCC through a pullup resistor if no active connection is used. Supply voltage Submit Documentation Feedback Copyright © 2005–2008, Texas Instruments Incorporated Product Folder Link(s): PCA9557 PCA9557 www.ti.com.................................................................................................................................................... SCPS133I – DECEMBER 2005 – REVISED JUNE 2008 LOGIC DIAGRAM (POSITIVE LOGIC) A0 A1 A2 SCL SDA 3 4 5 1 2 P7−P0 Input Filter I2C-Bus Control Shift Register 8 Bits I/O Port Write Pulse VCC RESET GND Read Pulse 16 15 Power-On Reset 8 A. Pin numbers shown are for the D, DB, DGV, PW, and RGY packages. B. All I/Os are set to inputs at reset. Submit Documentation Feedback Copyright © 2005–2008, Texas Instruments Incorporated Product Folder Link(s): PCA9557 3 PCA9557 SCPS133I – DECEMBER 2005 – REVISED JUNE 2008.................................................................................................................................................... www.ti.com SIMPLIFIED SCHEMATIC DIAGRAM OF P0 Data From Shift Register Data From Shift Register Configuration Register Q D Output Port Register Data FF Write Configuration Pulse CK Q Write Pulse D Q FF P0 CK Q Output Port Register ESD Protection Diode Input Port Register D Q FF Read Pulse GND Input Port Register Data CK Q Data From Shift Register D Q FF Write Polarity Pulse Polarity Register Data CK Q Polarity Inversion Register A. 4 On power up or reset, all registers return to default values. Submit Documentation Feedback Copyright © 2005–2008, Texas Instruments Incorporated Product Folder Link(s): PCA9557 PCA9557 www.ti.com.................................................................................................................................................... SCPS133I – DECEMBER 2005 – REVISED JUNE 2008 SIMPLIFIED SCHEMATIC DIAGRAM OF P7–P1 Data From Shift Register Data From Shift Register Output Port Register Data VCC Configuration Register D Q FF Write Configuration Pulse CK Q Write Pulse D Q FF P7−P1 CK Q Output Port Register ESD Protection Diode Input Port Register D Q FF Read Pulse GND Input Port Register Data CK Q Data From Shift Register D Q FF Write Polarity Pulse Polarity Register Data CK Q Polarity Inversion Register A. On power up or reset, all registers return to default values. I2C Interface The bidirectional I2C bus consists of the serial clock (SCL) and serial data (SDA) lines. Both lines must be connected to a positive supply through a pullup resistor when connected to the output stages of a device. Data transfer may be initiated only when the bus is not busy. I2C communication with this device is initiated by a master sending a start condition, a high-to-low transition on the SDA input/output while the SCL input is high (see Figure 1). After the start condition, the device address byte is sent, most-significant bit (MSB) first, including the data direction bit (R/W). After receiving the valid address byte, this device responds with an acknowledge (ACK), a low on the SDA input/output during the high of the ACK-related clock pulse. The address (A2–A0) inputs of the slave device must not be changed between the start and the stop conditions. On the I2C bus, only one data bit is transferred during each clock pulse. The data on the SDA line must remain stable during the high pulse of the clock period, as changes in the data line at this time are interpreted as control commands (start or stop) (see Figure 2). A stop condition, a low-to-high transition on the SDA input/output while the SCL input is high, is sent by the master (see Figure 1). Any number of data bytes can be transferred from the transmitter to the receiver between the Start and the Stop conditions. Each byte of eight bits is followed by one ACK bit. The transmitter must release the SDA line before the receiver can send an ACK bit. The device that acknowledges must pull down the SDA line during the ACK clock pulse, so that the SDA line is stable low during the high pulse of the ACK-related clock period (see Figure 3). When a slave receiver is addressed, it must generate an ACK after each byte is received. Similarly, the master must generate an ACK after each byte that it receives from the slave transmitter. Setup and hold times must be met to ensure proper operation. Submit Documentation Feedback Copyright © 2005–2008, Texas Instruments Incorporated Product Folder Link(s): PCA9557 5 PCA9557 SCPS133I – DECEMBER 2005 – REVISED JUNE 2008.................................................................................................................................................... www.ti.com A master receiver signals an end of data to the slave transmitter by not generating an acknowledge (NACK) after the last byte has been clocked out of the slave. This is done by the master receiver by holding the SDA line high. In this event, the transmitter must release the data line to enable the master to generate a stop condition. SDA SCL S P Stop Condition Start Condition Figure 1. Definition of Start and Stop Conditions SDA SCL Data Line Change Figure 2. Bit Transfer Data Output by Transmitter NACK Data Output by Receiver ACK SCL From Master 1 2 8 9 S Start Condition Clock Pulse for Acknowledgment Figure 3. Acknowledgment on the I2C Bus Interface Definition BYTE 6 BIT 7 (MSB) 6 5 4 3 2 1 0 (LSB) I2C slave address L L H H A2 A1 A0 R/W Px I/O data bus P7 P6 P5 P4 P3 P2 P1 P0 Submit Documentation Feedback Copyright © 2005–2008, Texas Instruments Incorporated Product Folder Link(s): PCA9557 PCA9557 www.ti.com.................................................................................................................................................... SCPS133I – DECEMBER 2005 – REVISED JUNE 2008 Device Address The address of the PCA9557 is shown in Figure 4. Slave Address 0 0 1 1 A2 A1 A0 R/W Fixed Programmable Figure 4. PCA9557 Address Address Reference INPUTS I2C BUS SLAVE ADDRESS A2 A1 A0 L L L 24 (decimal), 18 (hexadecimal) L L H 25 (decimal), 19 (hexadecimal) L H L 26 (decimal), 1A (hexadecimal) L H H 27 (decimal), 1B (hexadecimal) H L L 28 (decimal), 1C (hexadecimal) H L H 29 (decimal), 1D (hexadecimal) H H L 30 (decimal), 1E (hexadecimal) H H H 31 (decimal), 1F (hexadecimal) The last bit of the slave address defines the operation (read or write) to be performed. A high (1) selects a read operation, while a low (0) selects a write operation. Control Register and Command Byte Following the successful acknowledgment of the address byte, the bus master sends a command byte that is stored in the control register in the PCA9557. Two bits of this data byte state the operation (read or write) and the internal registers (input, output, polarity inversion or configuration) that will be affected. This register can be written or read through the I2C bus. The command byte is sent only during a write transmission. Once a new command byte has been sent, the register that was addressed continues to be accessed by reads until a new command byte has been sent. 0 0 0 0 0 0 B1 B0 Figure 5. Control Register Bits Command Byte CONTROL REGISTER BITS B1 B0 COMMAND BYTE (HEX) 0 0 0x00 Input Port Read byte xxxx xxxx 0 1 0x01 Output Port Read/write byte 0000 0000 1 0 0x02 Polarity Inversion Read/write byte 1111 0000 1 1 0x03 Configuration Read/write byte 1111 1111 REGISTER PROTOCOL POWER-UP DEFAULT Submit Documentation Feedback Copyright © 2005–2008, Texas Instruments Incorporated Product Folder Link(s): PCA9557 7 PCA9557 SCPS133I – DECEMBER 2005 – REVISED JUNE 2008.................................................................................................................................................... www.ti.com Register Descriptions The input port register (register 0) reflects the incoming logic levels of the pins, regardless of whether the pin is defined as an input or an output by the configuration register. It only acts on read operation. Writes to these registers have no effect. The default value, X, is determined by the externally applied logic level. Before a read operation, a write transmission is sent with the command byte to signal the I2C device that the input port register will be accessed next. Register 0 (Input Port Register) BIT I7 I6 I5 I4 I3 I2 I1 I0 DEFAULT X X X X X X X X The output port register (register 1) shows the outgoing logic levels of the pins defined as outputs by the configuration register. Bit values in this register have no effect on pins defined as inputs. In turn, reads from this register reflect the value that is in the flip-flop controlling the output selection, not the actual pin value. Register 1 (Output Port Register) BIT O7 O6 O5 O4 O3 O2 O1 O0 DEFAULT 0 0 0 0 0 0 0 0 The polarity inversion register (register 2) allows polarity inversion of pins defined as inputs by the configuration register. If a bit in this register is set (written with 1), the corresponding port pin's polarity is inverted. If a bit in this register is cleared (written with a 0), the corresponding port pin's original polarity is retained. Register 2 (Polarity Inversion Register) BIT N7 N6 N5 N4 N3 N2 N1 N0 DEFAULT 1 1 1 1 0 0 0 0 The configuration register (register 3) configures the directions of the I/O pins. If a bit in this register is set to 1, the corresponding port pin is enabled as an input with high impedance output driver. If a bit in this register is cleared to 0, the corresponding port pin is enabled as an output. Register 3 (Configuration Register) BIT C7 C6 C5 C4 C3 C2 C1 C0 DEFAULT 1 1 1 1 1 1 1 1 Power-On Reset When power (from 0 V) is applied to VCC, an internal power-on reset holds the PCA9557 in a reset condition until VCC has reached VPOR. At that time, the reset condition is released, and the PCA9557 registers and I2C/SMBus state machine initialize to their default states. After that, VCC must be lowered to below 0.2 V and back up to the operating voltage for a power-reset cycle. The RESET input can be asserted to reset the system, while keeping the VCC at its operating level. RESET A reset can be accomplished by holding the RESET pin low for a minimum of tW. The PCA9557 registers and I2C/SMBus state machine are held in their default states until RESET again is high. This input requires a pullup resistor to VCC if no active connection is used. 8 Submit Documentation Feedback Copyright © 2005–2008, Texas Instruments Incorporated Product Folder Link(s): PCA9557 PCA9557 www.ti.com.................................................................................................................................................... SCPS133I – DECEMBER 2005 – REVISED JUNE 2008 Bus Transactions Data is exchanged between the master and PCA9557 through write and read commands. Writes Data is transmitted to the PCA9557 by sending the device address and setting the least-significant bit (LSB) to a logic 0 (see Figure 4 for device address). The command byte is sent after the address and determines which register receives the data that follows the command byte. There is no limitation on the number of data bytes sent in one write transmission (see Figure 6 and Figure 7). SCL 1 2 3 4 5 6 7 8 9 Slave Address SDA S 0 0 1 Command Byte 1 A2 A1 A0 0 Start Condition A 0 0 0 0 0 0 Data to Port 0 1 A R/W ACK From Slave Data 1 A ACK From Slave P ACK From Slave Write to Port Data Out From Port Data 1 Valid tpv Figure 6. Write to Output Port Register <br/> SCL 1 2 3 4 5 6 7 8 9 Slave Address SDA S 0 0 1 Start Condition Command Byte 1 A2 A1 A0 0 R/W A 0 0 0 0 ACK From Slave 0 0 Data to Register 0 1/0 A Data ACK From Slave A P ACK From Slave Figure 7. Write to Configuration or Polarity Inversion Registers Submit Documentation Feedback Copyright © 2005–2008, Texas Instruments Incorporated Product Folder Link(s): PCA9557 9 PCA9557 SCPS133I – DECEMBER 2005 – REVISED JUNE 2008.................................................................................................................................................... www.ti.com Reads The bus master first must send the PCA9557 address with the LSB set to a logic 0 (see Figure 4 for device address). The command byte is sent after the address and determines which register is accessed. After a restart, the device address is sent again but, this time, the LSB is set to a logic 1. Data from the register defined by the command byte then is sent by the PCA9557 (see Figure 8 and Figure 9). After a restart, the value of the register defined by the command byte matches the register being accessed when the restart occurred. Data is clocked into the register on the rising edge of the ACK clock pulse. There is no limitation on the number of data bytes received in one read transmission, but when the final byte is received, the bus master must not acknowledge the data. ACK From Slave Slave Address S 0 0 1 1 A2 A1 A0 0 ACK From Slave Command Byte A A S 0 ACK From ACK From Master Slave Data from Register Slave Address 0 1 1 A2 A1 A0 1 A At this moment, master-transmitter becomes master-receiver, and slave-receiver becomes slave-transmitter R/W A Data First Byte R/W Data from Register NACK From Master Data NA P Last Byte Figure 8. Read From Register <br/> SCL 1 2 3 4 5 6 7 8 9 Data From Port Slave Address SDA S 0 0 1 1 A2 A1 A0 1 Start Condition R/W A Data 1 Data From Port A ACK From Slave Data 4 ACK From Master NA P NACK From Master Stop Condition Read From Port Data Into Port Data 2 tph Data 3 Data 4 Data 5 tps A. This figure assumes the command byte has been previously programmed with 00h. B. Transfer of data can be stopped at any moment by a stop condition. When this occurs, data present at the last acknowledge phase is valid (output mode). Input data is lost. C. This figure eliminates the command byte transfer, a restart, and slave address call between the initial slave address call and actual data transfer from the P port (see Figure 8). Figure 9. Read Input Port Register 10 Submit Documentation Feedback Copyright © 2005–2008, Texas Instruments Incorporated Product Folder Link(s): PCA9557 PCA9557 www.ti.com.................................................................................................................................................... SCPS133I – DECEMBER 2005 – REVISED JUNE 2008 ABSOLUTE MAXIMUM RATINGS (1) over operating free-air temperature range (unless otherwise noted) MIN MAX VCC Supply voltage range –0.5 6 V VI Input voltage range (2) –0.5 6 V (2) VO Output voltage range IIK Input clamp current VI < 0 –20 mA IOK Output clamp current VO < 0 –20 mA IIOK Input/output clamp current VO < 0 or VO > VCC –20 µA IOL Continuous output low current VO = 0 to VCC 50 mA IOH Continuous output high current VO = 0 to VCC –50 mA ICC θJA –0.5 Continuous current through GND –250 Continuous current through VCC 160 Package thermal impedance (3) D package 73 DB package 82 DGV package 120 PW package 108 RGV package 51 RGY package Tstg (1) (2) (3) 6 UNIT Storage temperature range V mA °C/W 47 –65 150 °C 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 under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. The input negative-voltage and output voltage ratings may be exceeded if the input and output current ratings are observed. The package thermal impedance is calculated in accordance with JESD 51-7. RECOMMENDED OPERATING CONDITIONS VCC MIN MAX 2.3 5.5 0.7 × VCC 5.5 2 5.5 SCL, SDA –0.5 0.3 × VCC A2–A0, P7–P0, RESET –0.5 0.8 Supply voltage SCL, SDA UNIT V VIH High-level input voltage VIL Low-level input voltage IOH High-level output current P7–P1 –10 mA IOL Low-level output current P7–P0 25 mA TA Operating free-air temperature 85 °C A2–A0, P7–P0, RESET –40 Submit Documentation Feedback Copyright © 2005–2008, Texas Instruments Incorporated Product Folder Link(s): PCA9557 V V 11 PCA9557 SCPS133I – DECEMBER 2005 – REVISED JUNE 2008.................................................................................................................................................... www.ti.com ELECTRICAL CHARACTERISTICS over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS VIK Input diode clamp voltage II = –18 mA VPOR Power-on reset voltage VI = VCC or GND, IO = 0 IOH = –8 mA P-port high-level output voltage (2) VOH IOH = –10 mA SDA VOL = 0.4 V VCC MIN 2.3 V to 5.5 V –1.2 VPOR 2.3 V 1.8 3V 2.6 4.5 V 3 4.75 V 4.1 2.3 V 1.5 3V 2.5 4.5 V 3 4.75 V 4 2.3 V to 5.5 V 3 VOL = 0.5 V IOL P port (3) VOL = 0.55 V 2.3 V to 5.5 V VOL = 0.7 V P port, except for P0 (3) IOH P0 (3) SCL, SDA II A2–A0, RESET TYP (1) MAX 1.65 2.1 UNIT V V V 8 20 8 20 10 24 mA VOH = 2.3 V 2.3 V to 5.5 V –4 mA VOH = 4.6 V 4.6 V to 5.5 V 1 VOH = 3.3 V 3.3 V to 5.5 V 1 VI = VCC or GND 2.3 V to 5.5 V ±1 ±1 µA µA IIH P port VI = VCC 2.3 V to 5.5 V 1 µA IIL P port VI = GND 2.3 V to 5.5 V 1 µA VI = VCC or GND, IO = 0, I/O = inputs, fSCL = 400 kHz Operating mode VI = VCC or GND, IO = 0, I/O = inputs, fSCL = 100 kHz ICC Standby mode ΔICC CI Cio (1) (2) (3) 12 Additional current in Standby mode SCL SDA P port VI = VCC or GND, IO = 0, I/O = inputs, fSCL = 0 kHz 5.5 V 19 25 3.6 V 12 22 2.7 V 8 20 5.5 V 1.5 5 3.6 V 1 4 2.7 V 0.6 3 5.5 V 0.25 1 3.6 V 0.25 0.9 2.7 V 0.2 0.8 One input at VCC – 0.6 V, Other inputs at VCC or GND 2.3 V to 5.5 V 0.2 Every LED I/O at VI = 4.3 V, fSCL = 0 kHz 5.5 V 0.4 µA mA VI = VCC or GND 2.3 V to 5.5 V VIO = VCC or GND 2.3 V to 5.5 V 4 6 5.5 8 7.5 9.5 pF pF All typical values are at nominal supply voltage (2.5-V, 3.3-V, or 5-V VCC) and TA = 25°C. The total current sourced by all I/Os must be limited to 85 mA per bit. Each I/O must be externally limited to a maximum of 25 mA, and the P port (P7–P0) must be limited to a maximum current of 200 mA. Submit Documentation Feedback Copyright © 2005–2008, Texas Instruments Incorporated Product Folder Link(s): PCA9557 PCA9557 www.ti.com.................................................................................................................................................... SCPS133I – DECEMBER 2005 – REVISED JUNE 2008 I2C INTERFACE TIMING REQUIREMENTS over recommended operating free-air temperature range (unless otherwise noted) (see Figure 10) STANDARD MODE I2C BUS FAST MODE I2C BUS MIN MAX 100 UNIT MIN MAX 0 400 fscl I2C clock frequency 0 tsch I2C clock high time 4 0.6 µs tscl I2C clock low time 4.7 1.3 µs 2 tsp I C spike time tsds I2C serial data setup time tsdh I2C serial data hold time ticr I2C input rise time 50 50 250 100 0 0 2 kHz ns ns ns 1000 20 + 0.1Cb (1) 300 ns (1) 300 ns 300 ticf I C input fall time 300 20 + 0.1Cb tocf I2C output fall time, 10-pF to 400-pF bus 300 20 + 0.1Cb (1) tbuf I2C bus free time between Stop and Start 4.7 1.3 µs tsts I2C Start or repeated Start condition setup time 4.7 0.6 µs tsth I2C Start or repeated Start condition hold time 4 0.6 µs tsps I2C Stop condition setup time 4 0.6 µs tvd(data) Valid data time, SCL low to SDA output valid 1 0.9 µs tvd(ack) Valid data time of ACK condition, ACK signal from SCL low to SDA (out) low 1 0.9 µs Cb I2C bus capacitive load 400 400 pF (1) ns Cb = total capacitance of one bus line in pF RESET TIMING REQUIREMENTS over recommended operating free-air temperature range (unless otherwise noted) (see Figure 13) STANDARD MODE I2C BUS MIN tW Reset pulse duration (1) tREC Reset recovery time tRESET Time to reset (2) (1) (2) MAX 16 FAST MODE I2C BUS MIN UNIT MAX 16 ns 0 0 ns 400 400 ns A pulse duration of 16 ns minimum must be applied to RESET to return the PCA9557 to its default state. The PCA9557 requires a minimum of 400 ns to be reset. SWITCHING CHARACTERISTICS over recommended operating free-air temperature range (unless otherwise noted) (see Figure 10) PARAMETER FROM TO STANDARD MODE I2C BUS MIN MAX FAST MODE I2C BUS MIN UNIT MAX SCL P0 250 250 SCL P1–P7 200 200 Input data setup time P port SCL 0 0 ns Input data hold time P port SCL 200 200 ns tpv Output data valid tps tph Submit Documentation Feedback Copyright © 2005–2008, Texas Instruments Incorporated Product Folder Link(s): PCA9557 ns 13 PCA9557 SCPS133I – DECEMBER 2005 – REVISED JUNE 2008.................................................................................................................................................... www.ti.com TYPICAL CHARACTERISTICS SUPPLY CURRENT vs TEMPERATURE STANDBY SUPPLY CURRENT vs TEMPERATURE 20 60 70 SCL = VCC VCC = 5 V ICC - Standby Supply Current - nA 50 f SCL = 400 kHz I/Os unloaded 45 40 35 30 25 VCC = 3.3 V 20 15 10 VCC = 2.5 V f SCL = 400 kHz I/Os unloaded 60 15 ICC – Supply Current – µA 55 ICC - Supply Current - µA SUPPLY CURRENT vs SUPPLY VOLTAGE VCC = 5 V 10 VCC = 3.3 V 5 VCC = 2.5 V 50 40 30 20 10 5 0 -50 -25 0 25 50 75 0 -50 100 0 -25 25 50 75 100 2.3 I/O SINK CURRENT vs OUTPUT LOW VOLTAGE TA = 25°C 15 10 TA = 85°C 5 30 ISINK – I/O Sink Current – mA ISINK – I/O Sink Current – mA 20 TA = –40°C 25 TA = 25°C 20 15 10 TA = 85°C 5 0 0.3 0.4 0.5 0.6 0.1 VOL – Output Low Voltage – V 30 TA = 25°C 25 20 15 10 TA = 85°C 0.3 0.4 0.5 0.0 0.6 0.1 0.2 0.3 0.4 0.5 0.6 VOL – Output Low Voltage – V I/O SOURCE CURRENT vs OUTPUT HIGH VOLTAGE (P7–P1) 40 VCC = 5 V VCC = 3.3 V 35 TA = –40°C 15 TA = 25°C 10 5 TA = 85°C 25 ISOURCE – I/O Source Current – mA ISOURCE – I/O Source Current – mA ISOURCE – I/O Source Current – mA 0.2 30 0 TA = –40°C 20 TA = 25°C 15 10 TA = 85°C 5 0.3 0.4 0.5 0.6 0.7 TA = –40°C 30 25 TA = 25°C 20 15 10 TA = 85°C 5 0 0 0.2 (VCC – VOH) – Output High Voltage – V 14 35 I/O SOURCE CURRENT vs OUTPUT HIGH VOLTAGE (P7–P1) VCC = 2.5 V 0.1 5.5 TA = –40°C 40 VOL – Output Low Voltage – V I/O SOURCE CURRENT vs OUTPUT HIGH VOLTAGE (P7–P1) 0.0 5.1 0 0.0 20 4.7 5 0 0.2 4.3 VCC = 5 V 45 35 TA = –40°C 3.9 50 VCC = 3.3 V 25 3.5 I/O SINK CURRENT vs OUTPUT LOW VOLTAGE 40 VCC = 2.5 V 0.1 3.1 VCC – Supply Voltage – V I/O SINK CURRENT vs OUTPUT LOW VOLTAGE 30 0.0 2.7 TA - Free-Air Temperature - °C TA - Free-Air Temperature - °C ISINK – I/O Sink Current – mA 0 0.0 0.1 0.2 0.3 0.4 0.5 0.6 (VCC – VOH) – Output High Voltage – V Submit Documentation Feedback 0.7 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 (VCC – VOH) – Output High Voltage – V Copyright © 2005–2008, Texas Instruments Incorporated Product Folder Link(s): PCA9557 PCA9557 www.ti.com.................................................................................................................................................... SCPS133I – DECEMBER 2005 – REVISED JUNE 2008 TYPICAL CHARACTERISTICS (continued) OUTPUT HIGH VOLTAGE vs SUPPLY VOLTAGE (P7–P1) OUTPUT HIGH VOLTAGE vs TEMPERATURE (P7–P1) 600 (V CC – V OH ) – Output High Voltage – mV TA = 25°C 5 4 IOH = –4 mA 3 IOH = –8 mA 2 IOH = –10 mA 1 0 2.3 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 VCC – Supply Voltage – V 550 500 300 450 400 350 300 250 VCC = 5 V, ISOURCE = 10 200 150 VCC = 2.5 V, ISOURCE = 1 mA 100 VCC = 5 V, ISOURCE = 1 mA 50 0 -50 -25 0 VCC = 2.5 V, ISINK = 10 mA 275 VCC = 2.5 V, ISOURCE = 10 VOL – Output Low Voltage – mV 6 VOH – Output High Voltage – V OUTPUT LOW VOLTAGE vs TEMPERATURE 25 50 75 TA – Free-Air Temperature – °C 250 225 200 175 150 VCC = 5 V, ISINK = 10 mA 125 100 VCC = 2.5 V, ISINK = 1 mA 75 50 VCC = 5 V, ISINK = 1 mA 25 100 0 -50 -25 0 25 50 75 Submit Documentation Feedback Copyright © 2005–2008, Texas Instruments Incorporated Product Folder Link(s): PCA9557 100 TA – Free-Air Temperature – °C 15 PCA9557 SCPS133I – DECEMBER 2005 – REVISED JUNE 2008.................................................................................................................................................... www.ti.com PARAMETER MEASUREMENT INFORMATION VCC RL = 1 kΩ SDA DUT CL = 50 pF (see Note A) SDA LOAD CONFIGURATION Three Bytes for Complete Device Programming Stop Condition (P) Start Address Address Condition Bit 7 Bit 6 (S) (MSB) Address Bit 1 tscl R/W Bit 0 (LSB) ACK (A) Data Bit 07 (MSB) Data Bit 10 (LSB) Stop Condition (P) tsch 0.7 × VCC SCL 0.3 × VCC ticr ticf tbuf tsts tPHL tPLH tsp 0.7 × VCC SDA 0.3 × VCC ticf ticr tsth tsdh tsds tsps Repeat Start Condition Start or Repeat Start Condition Stop Condition VOLTAGE WAVEFORMS BYTE DESCRIPTION 1 I2C address 2, 3 P-port data A. CL includes probe and jig capacitance. B. All inputs are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, tr/tf ≤ 30 ns. C. All parameters and waveforms are not applicable to all devices. Figure 10. I2C Interface Load Circuit and Voltage Waveforms 16 Submit Documentation Feedback Copyright © 2005–2008, Texas Instruments Incorporated Product Folder Link(s): PCA9557 PCA9557 www.ti.com.................................................................................................................................................... SCPS133I – DECEMBER 2005 – REVISED JUNE 2008 PARAMETER MEASUREMENT INFORMATION (continued) VCC RL = 4.7 kΩ INT DUT CL = 100 pF (see Note A) INTERRUPT LOAD CONFIGURATION ACK From Slave Start Condition 8 Bits (One Data Bytes) From Port R/W Slave Address S 0 0 1 1 A2 A1 A0 1 A 1 2 3 4 A 5 6 7 8 Data 1 ACK From Slave Data From Port A Data 2 1 P A tir tir B B INT A tiv tsps A Data Into Port Address Data 1 0.7 × VCC INT 0.3 × VCC SCL Data 2 0.7 × VCC R/W tiv A 0.3 × VCC tir 0.7 × VCC Pn 0.7 × VCC 1.5 V 0.3 × VCC INT 0.3 × VCC View A−A View B−B A. CL includes probe and jig capacitance. B. All inputs are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, tr/tf ≤ 30 ns. C. All parameters and waveforms are not applicable to all devices. Figure 11. Interrupt Load Circuit and Voltage Waveforms Submit Documentation Feedback Copyright © 2005–2008, Texas Instruments Incorporated Product Folder Link(s): PCA9557 17 PCA9557 SCPS133I – DECEMBER 2005 – REVISED JUNE 2008.................................................................................................................................................... www.ti.com PARAMETER MEASUREMENT INFORMATION (continued) Pn 500 W 2 × VCC DUT CL = 50 pF (see Note A) 500 W P-PORT LOAD CONFIGURATION 0.7 × VCC SCL P0 A P7 0.3 × VCC Slave ACK ÎÎÎ ÎÎÎ ÎÎÎ ÎÎÎ SDA Pn tpv (see Note B) Unstable Data Last Stable Bit WRITE MODE (R/W = 0) 0.7 × VCC SCL P0 A tps P7 0.3 × VCC tph 0.7 × VCC 1.5 V 0.3 × VCC Pn READ MODE (R/W = 1) A. CL includes probe and jig capacitance. B. tpv is measured from 0.7 × VCC on SCL to 50% I/O (Pn) output. C. All inputs are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, tr/tf ≤ 30 ns. D. The outputs are measured one at a time, with one transition per measurement. E. All parameters and waveforms are not applicable to all devices. Figure 12. P-Port Load Circuit and Voltage Waveforms 18 Submit Documentation Feedback Copyright © 2005–2008, Texas Instruments Incorporated Product Folder Link(s): PCA9557 PCA9557 www.ti.com.................................................................................................................................................... SCPS133I – DECEMBER 2005 – REVISED JUNE 2008 PARAMETER MEASUREMENT INFORMATION (continued) VCC RL = 1 kΩ DUT 500 W Pn SDA 2 × VCC DUT CL = 50 pF (see Note A) CL = 50 pF (see Note A) 500 W P-PORT LOAD CONFIGURATION SDA LOAD CONFIGURATION Start SCL ACK or Read Cycle SDA 0.3 y VCC tRESET RESET VCC/2 tREC tw Pn VCC/2 tRESET A. CL includes probe and jig capacitance. B. All inputs are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, tr/tf ≤ 30 ns. C. I/Os are configured as inputs. D. All parameters and waveforms are not applicable to all devices. Figure 13. Reset Load Circuits and Voltage Waveforms Submit Documentation Feedback Copyright © 2005–2008, Texas Instruments Incorporated Product Folder Link(s): PCA9557 19 PCA9557 SCPS133I – DECEMBER 2005 – REVISED JUNE 2008.................................................................................................................................................... www.ti.com APPLICATION INFORMATION Figure 14 shows an application in which the PCA9557 can be used. VCC (5 V) VCC Master Controller 1.8 kΩ 1.8 kΩ 620 Ω 2 kΩ 2 kΩ 100 kΩ (X 5) VCC SCL SCL SDA SDA P0 Subsystem 1 INT P1 RESET RESET P2 RESET P3 GND Subsystem 2 (e.g., Counter) PCA9557 P4 P5 A2 A Controlled Switch (e.g., CBT Device) P6 A1 P7 A0 ENABLE B GND ALARM Subsystem 3 (e.g., Alarm System) GND 10 kΩ A. Device address is configured as 0011100 for this example. B. P1, P4, and P5 are configured as inputs. C. P0, P2, and P3 are configured as outputs. D. P6 and P7 are not used and must be configured as outputs. Figure 14. Typical Application 20 Submit Documentation Feedback Copyright © 2005–2008, Texas Instruments Incorporated Product Folder Link(s): PCA9557 PCA9557 www.ti.com.................................................................................................................................................... SCPS133I – DECEMBER 2005 – REVISED JUNE 2008 Minimizing ICC When I/O Is Used to Control LED When an I/O is used to control an LED, normally it is connected to VCC through a resistor as shown in Figure 14. The LED acts as a diode so, when the LED is off, the I/O VIN is about 1.2 V less than VCC. The ΔICC parameter in Electrical Characteristics shows how ICC increases as VIN becomes lower than VCC. Designs needing to minimize current consumption, such as battery power applications, should consider maintaining the I/O pins greater than or equal to VCC when the LED is off. Figure 15 shows a high-value resistor in parallel with the LED. Figure 16 shows VCC less than the LED supply voltage by at least 1.2 V. Both of these methods maintain the I/O VIN at or above VCC and prevent additional supply-current consumption when the LED is off. VCC 100 kW LED VCC Pn Figure 15. High-Value Resistor in Parallel With the LED 3.3 V VCC 5V LED Pn Figure 16. Device Supplied by a Low Voltage Submit Documentation Feedback Copyright © 2005–2008, Texas Instruments Incorporated Product Folder Link(s): PCA9557 21 PACKAGE OPTION ADDENDUM www.ti.com 4-Jan-2008 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty PCA9557D ACTIVE SOIC D 16 40 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9557DB ACTIVE SSOP DB 16 80 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9557DBG4 ACTIVE SSOP DB 16 80 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9557DBR ACTIVE SSOP DB 16 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9557DBRG4 ACTIVE SSOP DB 16 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9557DG4 ACTIVE SOIC D 16 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9557DGVR ACTIVE TVSOP DGV 16 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9557DGVRG4G4 ACTIVE TVSOP DGV 16 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9557DR ACTIVE SOIC D 16 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9557DRG4 ACTIVE SOIC D 16 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9557DT ACTIVE SOIC D 16 250 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9557DTG4 ACTIVE SOIC D 16 250 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9557PW ACTIVE TSSOP PW 16 90 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9557PWG4 ACTIVE TSSOP PW 16 90 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9557PWR ACTIVE TSSOP PW 16 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9557PWRG4 ACTIVE TSSOP PW 16 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9557PWT ACTIVE TSSOP PW 16 250 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9557PWTG4 ACTIVE TSSOP PW 16 250 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM PCA9557RGVR ACTIVE QFN RGV 16 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR PCA9557RGVRG4 ACTIVE QFN RGV 16 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR PCA9557RGYR ACTIVE QFN RGY 16 1000 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR PCA9557RGYRG4 ACTIVE QFN RGY 16 1000 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR 40 (1) Lead/Ball Finish MSL Peak Temp (3) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. Addendum-Page 1 PACKAGE OPTION ADDENDUM www.ti.com 4-Jan-2008 OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis. Addendum-Page 2 PACKAGE MATERIALS INFORMATION www.ti.com 19-Mar-2008 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel Diameter Width (mm) W1 (mm) A0 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 6.6 2.5 12.0 16.0 Q1 PCA9557DBR SSOP DB 16 2000 330.0 16.4 8.2 PCA9557DGVR TVSOP DGV 16 2000 330.0 12.4 6.8 4.0 1.6 8.0 12.0 Q1 PCA9557DR SOIC D 16 2500 330.0 16.4 6.5 10.3 2.1 8.0 16.0 Q1 PCA9557PWR TSSOP PW 16 2000 330.0 12.4 7.0 5.6 1.6 8.0 12.0 Q1 PCA9557RGVR QFN RGV 16 2500 330.0 12.4 4.3 4.3 1.5 8.0 12.0 Q2 PCA9557RGYR QFN RGY 16 1000 180.0 12.4 3.8 4.3 1.5 8.0 12.0 Q1 Pack Materials-Page 1 PACKAGE MATERIALS INFORMATION www.ti.com 19-Mar-2008 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) PCA9557DBR SSOP DB 16 2000 346.0 346.0 33.0 PCA9557DGVR TVSOP DGV 16 2000 346.0 346.0 29.0 PCA9557DR SOIC D 16 2500 346.0 346.0 33.0 PCA9557PWR TSSOP PW 16 2000 346.0 346.0 29.0 PCA9557RGVR QFN RGV 16 2500 346.0 346.0 29.0 PCA9557RGYR QFN RGY 16 1000 190.5 212.7 31.8 Pack Materials-Page 2 MECHANICAL DATA MSSO002E – JANUARY 1995 – REVISED DECEMBER 2001 DB (R-PDSO-G**) PLASTIC SMALL-OUTLINE 28 PINS SHOWN 0,38 0,22 0,65 28 0,15 M 15 0,25 0,09 8,20 7,40 5,60 5,00 Gage Plane 1 14 0,25 A 0°–ā8° 0,95 0,55 Seating Plane 2,00 MAX 0,10 0,05 MIN PINS ** 14 16 20 24 28 30 38 A MAX 6,50 6,50 7,50 8,50 10,50 10,50 12,90 A MIN 5,90 5,90 6,90 7,90 9,90 9,90 12,30 DIM 4040065 /E 12/01 NOTES: A. B. C. D. All linear dimensions are in millimeters. This drawing is subject to change without notice. Body dimensions do not include mold flash or protrusion not to exceed 0,15. Falls within JEDEC MO-150 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 MECHANICAL DATA MTSS001C – JANUARY 1995 – REVISED FEBRUARY 1999 PW (R-PDSO-G**) PLASTIC SMALL-OUTLINE PACKAGE 14 PINS SHOWN 0,30 0,19 0,65 14 0,10 M 8 0,15 NOM 4,50 4,30 6,60 6,20 Gage Plane 0,25 1 7 0°– 8° A 0,75 0,50 Seating Plane 0,15 0,05 1,20 MAX PINS ** 0,10 8 14 16 20 24 28 A MAX 3,10 5,10 5,10 6,60 7,90 9,80 A MIN 2,90 4,90 4,90 6,40 7,70 9,60 DIM 4040064/F 01/97 NOTES: A. B. C. D. All linear dimensions are in millimeters. This drawing is subject to change without notice. Body dimensions do not include mold flash or protrusion not to exceed 0,15. Falls within JEDEC MO-153 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 MECHANICAL DATA MPDS006C – FEBRUARY 1996 – REVISED AUGUST 2000 DGV (R-PDSO-G**) PLASTIC SMALL-OUTLINE 24 PINS SHOWN 0,40 0,23 0,13 24 13 0,07 M 0,16 NOM 4,50 4,30 6,60 6,20 Gage Plane 0,25 0°–8° 1 0,75 0,50 12 A Seating Plane 0,15 0,05 1,20 MAX PINS ** 0,08 14 16 20 24 38 48 56 A MAX 3,70 3,70 5,10 5,10 7,90 9,80 11,40 A MIN 3,50 3,50 4,90 4,90 7,70 9,60 11,20 DIM 4073251/E 08/00 NOTES: A. B. C. D. All linear dimensions are in millimeters. This drawing is subject to change without notice. Body dimensions do not include mold flash or protrusion, not to exceed 0,15 per side. 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