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SAA1064 Dataheets PDF



Part Number SAA1064
Manufacturers Philips
Logo Philips
Description 4-digit LED-driver with I2C-Bus interface
Datasheet SAA1064 DatasheetSAA1064 Datasheet (PDF)

INTEGRATED CIRCUITS DATA SHEET SAA1064 4-digit LED-driver with I2C-Bus interface Product specification File under Integrated Circuits, IC01 February 1991 Philips Semiconductors Product specification 4-digit LED-driver with I2C-Bus interface GENERAL DESCRIPTION The LED-driver is a bipolar integrated circuit made in an I2L compatible 18 volts process. The circuit is especially designed to drive four 7-segment LED displays with decimal point by means of multiplexing between two pairs of digits. .

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INTEGRATED CIRCUITS DATA SHEET SAA1064 4-digit LED-driver with I2C-Bus interface Product specification File under Integrated Circuits, IC01 February 1991 Philips Semiconductors Product specification 4-digit LED-driver with I2C-Bus interface GENERAL DESCRIPTION The LED-driver is a bipolar integrated circuit made in an I2L compatible 18 volts process. The circuit is especially designed to drive four 7-segment LED displays with decimal point by means of multiplexing between two pairs of digits. It features an I2C-Bus slave transceiver interface with the possibility to program four different SLAVE ADDRESSES, a POWER RESET flag, 16 current sink OUTPUTS, controllable by software up to 21 mA, two multiplex drive outputs for common anode segments, an on-chip multiplex oscillator, control bits to select static, dynamic and blank mode, and one bit for segment test. QUICK REFERENCE DATA PARAMETER Supply voltage Supply current all outputs OFF Total power dissipation 24-lead DIL (SOT101B) 24-lead DIL SO (SOT137A) Operating ambient temperature range Note 1. The positive current is defined as the conventional current flow into a device (sink current). PACKAGE OUTLINE SAA1064: 24-lead DIL; plastic with internal heat spreader (SOT101B); SOT101-1; 1996 August 30. SAA1064T: 24-lead mini-pack; plastic (SO-24; SOT137A); SOT137-1; 1996 August 30. Tamb −40 − Ptot Ptot − − − − CONDITIONS VEE = 0 V VCC = 5 V SYMBOL VCC ICC(1) 7 MIN. 4.5 5 9.5 TYP. SAA1064 MAX. 15 14 1000 500 +85 V UNIT mA mW mW °C February 1991 2 Philips Semiconductors Product specification 4-digit LED-driver with I2C-Bus interface SAA1064 February 1991 3 Fig.1 Block diagram. Philips Semiconductors Product specification 4-digit LED-driver with I2C-Bus interface PINNING SYMBOL ADR CEXT P8 to P1 MX1 VEE VCC MX2 P9 to P16 SDA SCL 1 2 3-10 11 12 13 14 15-22 23 24 PIN I2C-Bus DESCRIPTION slave address input external control segment output multiplex output ground positive supply multiplex output segment output I2C-Bus serial data line I2C-Bus serial clock line SAA1064 Fig.2 Pinning diagram. February 1991 4 Philips Semiconductors Product specification 4-digit LED-driver with I2C-Bus interface FUNCTIONAL DESCRIPTION SAA1064 a. READ mode. b. WRITE mode. S = start condition P = stop condition A = acknowledge X = don’t care A1, A0 SC SB SA C6 to C0 PR Fig.3 I2C-Bus format. = programmable address bits = subaddress bits = control bits = POWER RESET flag Address pin ADR Four different slave addresses can be chosen by connecting ADR either to VEE, 3/8 VCC, 5/8 VCC or VCC. This results in the corresponding valid addresses HEX 70, 72, 74 and 76 for writing and 71, 73, 75 and 77 for reading. All other addresses cannot be acknowledged by the circuit. February 1991 5 Philips Semiconductors Product specification 4-digit LED-driver with I2C-Bus interface Status byte SAA1064 Only one bit is present in the status byte, the POWER RESET flag. A logic 1 indicates the occurence of a power failure since the last time it was read out. After completion of the READ action this flag will be set to logic 0. Subaddressing The bits SC, SB and SA form a pointer and determine to which register the data byte following the instruction byte will be written. All other bytes will then be stored in the registers with consecutive subaddresses. This feature is called Auto-Increment (AI) of the subaddress and enables a quick initialization by the master. The subaddress pointer will wrap around from 7 to 0. The subaddresses are given as follows: SC 0 0 0 0 1 1 1 1 SB 0 0 1 1 0 0 1 1 SA 0 1 0 1 0 1 0 1 SUB-ADDRESS 00 01 02 03 04 05 06 07 FUNCTION control register digit 1 digit 2 digit 3 digit 4 reserved, not used reserved, not used reserved, not used Control bits (see Fig.4) The control bits C0 to C6 have the following meaning: C0 = 0 C0 = 1 C1 = 0/1 C2 = 0/1 C3 = 1 C4 = 1 C5 = 1 C6 = 1 Note 1. At a current determined by C4, C5 and C6. Data A segment is switched ON if the corresponding data bit is logic 1. Data bits D17 to D10 correspond with digit 1, D27 to D20 with digit 2, D37 to D30 with digit 3 and D47 to D40 with digit 4. The MSBs correspond with the outputs P8 and P16, the LSBs with P1 and P9. Digit numbers 1 to 4 are equal to their subaddresses (hex) 1 to 4. static mode, i.e. continuous display of digits 1 and 2 dynamic mode, i.e. alternating display of digit 1 + 3 and 2 + 4 digits 1 + 3 are blanked/not blanked digits 2 + 4 are blanked/not blanked all segment outputs are switched-on for segment test(1) adds 3 mA to segment output current adds 6 mA to segment output current adds 12 mA to segment output current February 1991 6 Philips Semiconductors Product specification 4-digit LED-driver with I2C-Bus interface SDA, SCL SAA1064 The SDA and SCL I/O meet the I2C-Bus specification. For protection against positive voltage pulses on these inputs voltage regulator diodes are connected to VEE. This means that normal line voltage should not exceed 5,5 volt. Data will be lat.


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