INTEGRATED CIRCUITS PTN3501 Maintenance and control device Product specification Supersedes data of 2000 Nov 22 2001 Jan 17
Philips Semiconductors Product specification Maintenance and control device PTN3501 FEATURES PIN CONFIGURATION • I2C to parallel port expander • Internal 256x8 E2PROM • Self timed write cycle (5 ms typ.) • 16 byte page write operation • Controlled pull-up on address lines • Low voltage VCC range of +2.5 V to +3.6 V • 5 V – tolerant I/Os • Low standby current (< 60 µA ) • Power on Reset • Supports Live Insertion • Compatible with SMBus specification version 1.
Philips Semiconductors Product specification Maintenance and control device PTN3501 CHARACTERISTICS OF THE I2C-BUS The I2C-bus is for 2-way, 2-line communication between different ICs or modules. The two lines are a serial data line (SDA) and a serial clock line (SCL). Both lines must be connected to a positive supply via a pull-up resistor when connected to the output stages of a device. Data transfer may be initiated only when the bus is not busy.
Philips Semiconductors Product specification Maintenance and control device PTN3501 out of the slave transmitter. The device that acknowledges has to pull down the SDA line during the acknowledge clock pulse, so that the SDA line is stable LOW during the HIGH period of the acknowledge related clock pulse, set–up and hold times must be taken into account. Acknowledge (see Figure 6) The number of data bytes transferred between the start and the stop conditions from transmitter to receiver is not limited.
Philips Semiconductors Product specification Maintenance and control device PTN3501 Addressing For addressing, see Figure 8. SLAVE ADDRESS S 0 A5 A4 A3 A2 SLAVE ADDRESS A1 A0 0 A S 1 A5 A4 A3 a. (a) I/O EXPANDER A2 A1 A0 0 A b. (b) MEMORY SW00648 Figure 8. PTN3501 slave addresses Asynchronous Start Following any Start condition on the bus, a minimum of 9 SCL clock cycles must be completed before a Stop condition can be issued.
Philips Semiconductors Product specification Maintenance and control device PTN3501 • In the WRITE mode at the acknowledge bit after the Interrupt (see Figs 11 and 12) The PTN3501 provides an open drain output (INT) which can be fed to a corresponding input of the microcontroller. This gives these chips a type of master function which can initiate an action elsewhere in the system. HIGH–to–LOW transition of the SCL signal • Returning of the port data to its original setting.
Philips Semiconductors Product specification Maintenance and control device PTN3501 Quasi-bidirectional I/Os (see Figure 13) A quasi-bidirectional I/O can be used as an input or output without the use of a control signal for data direction. At power-on the I/Os are HIGH. In this mode, only a current source to VDD is active. An additional strong pull-up to VDD allows fast rising edges into heavily loaded outputs.
Philips Semiconductors Product specification Maintenance and control device PTN3501 the master issues the stop condition, initiating the internal write cycle to the non–volatile memory. Only write and read operations to the quasi–bidirectional I/Os are allowed during the internal write cycle. MEMORY OPERATIONS Write operations Write operations require an additional address field to indicate the memory address location to be written.
Philips Semiconductors Product specification Maintenance and control device PTN3501 The master must perform a byte write to the address location to be read, but instead of transmitting the data after receiving the acknowledge from the PTN3501 the master reissues the start condition and memory slave address with the R/W bit set to one. The PTN3501 will then transmit an acknowledge and use the next eight clock cycles to transmit the data contained in the addressed location.
Philips Semiconductors Product specification Maintenance and control device PTN3501 ABSOLUTE MAXIMUM RATINGS Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. PARAMETER SYMBOL MIN MAX UNIT VCC Supply Voltage –0.5 4.0 V VI Input Voltage VSS – 0.5 5.
Philips Semiconductors Product specification Maintenance and control device PTN3501 I2C-BUS TIMING CHARACTERISTICS SYMBOL I2C-bus PARAMETER MIN. TYP. MAX. UNIT timing (see Figure 19; Note 1) fSCL SCL clock frequency – – 400 kHz tSW tolerable spike width on bus – – 50 ns tBUF bus free time 1.3 – – µs tSU;STA START condition set–up time 0.6 – – µs tHD;STA START condition hold time 0.6 – – µs tr SCL and SDA rise time – – 0.3 µs tf SCL and SDA fall time – – 0.
Philips Semiconductors Product specification Maintenance and control device PTN3501 POWER-UP TIMING SYMBOL PARAMETER MAX. UNIT 1 Power-up to Read Operation 1 ms tPUW1 Power-up to Write Operation 5 ms tPUR NOTE: 1. tPUR and tPUW are the delays required from the time VCC is stable until the specified operation can be initiated. These parameters are guaranteed by design. WRITE CYCLE LIMITS SYMBOL PARAMETER MIN. TYP. (5) MAX. UNIT tWR1 Write Cycle Time – 5 10 ms NOTE: 1.
Philips Semiconductors Product specification Maintenance and control device PTN3501 SOLDERING seconds depending on heating method. Typical reflow temperatures range from 215 to 250°C. Introduction There is no soldering method that is ideal for all IC packages. Wave soldering is often preferred when through-hole and surface mounted components are mixed on one printed-circuit board.
Philips Semiconductors Product specification Maintenance and control device PTN3501 TSSOP20: plastic thin shrink small outline package; 20 leads; body width 4.
Philips Semiconductors Product specification Maintenance and control device PTN3501 Data sheet status Data sheet status Product status Definition [1] Objective specification Development This data sheet contains the design target or goal specifications for product development. Specification may change in any manner without notice. Preliminary specification Qualification This data sheet contains preliminary data, and supplementary data will be published at a later date.
