INTEGRATED CIRCUITS DATA SHEET HEF4794B 8-stage shift-and-store register LED driver Product specification Supersedes data of 1994 Jul 01 File under Integrated Circuits, IC04 1999 Jun 30 Philips Semiconductors Product specification 8-stage shift-and-store register LED driver HEF4794B transferred to the storage register when the strobe (STR) input is HIGH. Data in the storage register appears at the outputs whenever the output enable (EO) signal is HIGH. APPLICATIONS • Automotive • Industrial. Two serial outputs (OS and OS') are available for cascading a number of HEF4794B devices. Data is available at OS on positive-going clock edges to allow high-speed operation in cascaded systems in which the clock rise time is fast. The same serial information is available at OS' on the next negative-going clock edge and provides cascading HEF4794B devices when the clock rise time is slow. GENERAL DESCRIPTION The HEF4794B is an 8-stage serial shift register having a storage latch associated with each stage for strobing data from the serial input to parallel LED driver outputs O0 to O7. Data is shifted on positive-going clock transitions. The data in each shift register stage is ORDERING INFORMATION PACKAGES TYPE NUMBER PINS PIN POSITION MATERIAL CODE HEF4794BT 16 SO16 plastic SOT109-1 HEF4794BP 16 DIP16 plastic SOT38-1 FUNCTIONAL DIAGRAM LOGIC DIAGRAMS V DD 16 HEF4794B D 2 10 O S' 8-STAGE SHIFT REGISTER CP 3 9 STR 1 OS D handbook, halfpage 8-BIT STORAGE REGISTER CP O MBD912 EO 15 OPEN-DRAIN OUTPUTS 8 4 VSS O 0 5 6 O1 O2 O3 7 14 13 12 11 O4 O5 O6 O7 MBD909 Fig.2 One D-latch. Fig.1 Functional diagram. 1999 Jun 30 2 Philips Semiconductors Product specification 8-stage shift-and-store register LED driver HEF4794B handbook, full pagewidth STAGE 0 D D STAGE 1 to 6 D O STAGE 7 O CP D OS O CP FF 1 FF 8 D CP OS ' Q CP latch D O D CP O CP latch 1 latch 8 STR HEF4794B EO MBD911 O0 O 1 O2 O 3 O 4 O 5 O 6 O7 Fig.3 Logic diagram. PINNING SYMBOL PIN DESCRIPTION STR 1 strobe input D 2 data input CP 3 clock input O0 to O3 VSS OS,OS' 4 to 7 8 9 and 10 STR 1 16 VDD D 2 15 14 O 4 EO parallel outputs 0 to 3 (open drain) CP 3 O0 4 ground O1 5 12 O 6 serial outputs O2 6 11 O 7 O3 7 10 O S' V SS 8 9 O7 11 parallel output 7 (open drain) O6 12 parallel output 6 (open drain) O5 13 parallel output 5 (open drain) O4 14 parallel output 4 (open drain) EO 15 output enable input VDD 16 supply voltage 1999 Jun 30 handbook, halfpage 13 O 5 HEF4794B OS MBD910 Fig.4 Pin configuration. 3 Philips Semiconductors Product specification 8-stage shift-and-store register LED driver HEF4794B FUNCTIONAL DESCRIPTION FAMILY DATA Table 1 See “Family Specifications” except for: rating for DC current into any open-drain output is 40 mA. Function table; note 1 PARALLEL OUTPUTS INPUTS SERIAL OUTPUTS CP EO STR D O0 On OS OS' ↑ L X X Z Z O6' nc ↓ L X X Z Z nc O7 ↑ H L X nc nc O6' nc ↑ H H L L On − 1 O6' nc ↑ H H H H On − 1 O6' nc ↓ H H H nc nc nc O7 IDD LIMITS CATEGORY MSI See “Family Specifications” for ratings. Note 1. H = HIGH state; L = LOW state; X = don’t care; ↑ = positive-going transition; ↓ = negative-going transition; Z = high-impedance OFF state; nc = no change; O6' = the information in the seventh shift register stage. a) At the positive clock edge the information in the 7th register stage is transferred to the 8th register stage and the OS output. DC CHARACTERISTICS VSS = 0 V. Tamb (°C) SYMBOL PARAMETER −40 CONDITIONS MIN. VOL IOZH 1999 Jun 30 LOW level output voltage HIGH level output leakage current; 3-state MAX. +25 MIN. MAX. +85 MIN. UNIT MAX. VI = VSS or VDD; IO < 20 mA; VDD = 5 V − 0.75 − 0.75 − 1.5 V VI = VSS or VDD; IO < 20 mA; VDD = 10 V − 0.75 − 0.75 − 1.5 V VI = VSS or VDD; IO < 20 mA; VDD = 15 V − 0.75 − 0.75 − 1.5 V VO = 15 V; VDD = 5 V − 2 − 2 − 15 µA VO = 15 V; VDD = 10 V − 2 − 2 − 15 µA VO = 15 V; VDD = 15 V − 2 − 2 − 15 µA 4 Philips Semiconductors Product specification 8-stage shift-and-store register LED driver HEF4794B AC POWER CHARACTERISTICS VSS = 0 V; Tamb = 25 °C; input transition times ≤ 20 ns; unless otherwise specified. SYMBOL P PARAMETER TYPICAL FORMULA FOR P (µW)(1) CONDITIONS dynamic power dissipation per package VDD = 5 V 1200f i + Σ ( f o C L ) × V DD VDD = 10 V 5550f i + Σ ( f o C L ) × V DD VDD = 15 V 15000f i + Σ ( f o C L ) × V DD 2 2 2 Note 1. Where: RL = ∞; fi = input frequency (MHz); fo = output frequency (MHz); CL = load capacitance (pF); Σ(foCL) = sum of outputs; VDD = supply voltage (V). AC TIMING CHARACTERISTICS VSS = 0 V; Tamb = 25 °C; CL = 50 pF; input transition times ≤20 ns; unless otherwise specified. SYMBOL tPHL tPLH tPHL tPLH tPZL tPLZ 1999 Jun 30 PARAMETER propagation delay time CP to OS; HIGH-to-LOW propagation delay time CP to OS; LOW-to-HIGH propagation delay time CP to OS'; HIGH-to-LOW propagation delay time CP to OS'; LOW-to-HIGH propagation delay time CP to On; OFF-to-LOW propagation delay time CP to On; LOW-to-OFF VDD (V) MIN. TYP. MAX. UNIT TYPICAL EXTRAPOLATION FORMULA 5 − 160 320 ns 132 ns + (0.55 ns/pF)CL 10 − 65 130 ns 53 ns + (0.23 ns/pF)CL 15 − 45 90 ns 37 ns + (0.16 ns/pF)CL 5 − 130 260 ns 102 ns + (0.55 ns/pF)CL 10 − 55 110 ns 44 ns + (0.23 ns/pF)CL 15 − 40 80 ns 32 ns + (0.16 ns/pF)CL 5 − 120 240 ns 92 ns + (0.55 ns/pF)CL 10 − 50 100 ns 39 ns + (0.23 ns/pF)CL 15 − 40 80 ns 32 ns + (0.16 ns/pF)CL 5 − 130 260 ns 102 ns + (0.55 ns/pF)CL 10 − 60 120 ns 49 ns + (0.23 ns/pF)CL 15 − 45 90 ns 37 ns + (0.16 ns/pF)CL 5 − 240 480 ns note 1 10 − 80 160 ns 15 − 55 110 ns 5 − 170 340 ns 10 − 75 150 ns 15 − 60 120 ns 5 note 1 Philips Semiconductors Product specification 8-stage shift-and-store register LED driver SYMBOL tPZL tPLZ tTHL tTLH tPZL tPLZ tWCPL PARAMETER VDD (V) tsu th fclk(max) − MAX. UNIT − − propagation delay time STR to On; 5 LOW-to-OFF 10 − 100 − 40 100 ns 15 − 35 70 ns 5 − 85 170 ns 35 ns + (1.0 ns/pF)CL 10 − 40 80 ns 19 ns + (0.42 ns/pF)CL 15 − 30 60 ns 16 ns + (0.28 ns/pF)CL 5 − 85 170 ns 35 ns + (1.0 ns/pF)CL 10 − 40 80 ns 19 ns + (0.42 ns/pF)CL 15 − 30 60 ns 16 ns + (0.28 ns/pF)CL 5 − 100 200 ns note 1 10 − 55 110 ns 15 − 50 100 ns 5 − 80 160 ns 10 − 40 80 ns 15 − 30 60 ns 5 60 30 − ns 10 30 15 − ns output transition time OS and OS'; LOW-to-HIGH output enable time EO to On; OFF-to-LOW output disable time EO to On; LOW-to-OFF minimum clock pulse width LOW hold time D to CP maximum clock frequency ns 70 140 ns 55 110 ns 200 ns 24 12 − ns 80 40 − ns 10 60 30 − ns 15 24 12 − ns 5 60 30 − ns 10 20 10 − ns 15 15 5 − ns minimum strobe pulse width HIGH 5 set-up time D to CP 280 TYPICAL EXTRAPOLATION FORMULA 15 output transition time OS and OS'; HIGH-to-LOW 140 +5 +5 −15 − ns 10 20 5 − ns 15 20 5 − ns 5 5 10 − MHz 10 11 22 − MHz 15 14 28 − MHz Note 1. Definition of symbol equivalent to 3-state outputs. 1999 Jun 30 TYP. propagation delay time STR to On; 5 OFF-to-LOW 10 15 tWSTRH MIN. HEF4794B 6 note 1 note 1 note 1 Philips Semiconductors Product specification 8-stage shift-and-store register LED driver HEF4794B handbook, full pagewidth clock input data input strobe input output enable input internal O 0 ' (FF1) output O0 internal O 6 ' (FF7) output O6 serial output O S serial output O S ' MBD914 Fig.5 Timing diagram. 1999 Jun 30 7 This text is here in white to force landscape pages to be rotated correctly when browsing through the pdf in the Acrobat reader.This text is here in _white to force landscape pages to be rotated correctly when browsing through the pdf in the Acrobat reader.This text is here inThis text is here in white to force landscape pages to be rotated correctly when browsing through the pdf in the Acrobat reader. white to force landscape pages to be ... O7 VDD 8 D HEF4794B EO STR O S' CP V SS O0 VDD O7 O S' HEF4794B D EO STR CP VSS PWM dimmer input Philips Semiconductors O0 8-stage shift-and-store register LED driver VCC APPLICATION INFORMATION 1999 Jun 30 VDD MBD913 CONTROL AND SYNC CIRCUITRY DATA CLOCK Product specification Fig.6 Application example: serial-to-parallel converting LED drivers. HEF4794B handbook, full pagewidth from remote controller Philips Semiconductors Product specification 8-stage shift-and-store register LED driver HEF4794B PACKAGE OUTLINES SO16: plastic small outline package; 16 leads; body width 3.9 mm SOT109-1 D E A X c y HE v M A Z 16 9 Q A2 A (A 3) A1 pin 1 index θ Lp 1 L 8 e 0 detail X w M bp 2.5 5 mm scale DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT A max. A1 A2 A3 bp c D (1) E (1) e HE L Lp Q v w y Z (1) mm 1.75 0.25 0.10 1.45 1.25 0.25 0.49 0.36 0.25 0.19 10.0 9.8 4.0 3.8 1.27 6.2 5.8 1.05 1.0 0.4 0.7 0.6 0.25 0.25 0.1 0.7 0.3 0.01 0.019 0.0100 0.39 0.014 0.0075 0.38 0.16 0.15 0.244 0.050 0.041 0.228 0.039 0.016 0.028 0.020 inches 0.010 0.057 0.069 0.004 0.049 0.01 0.01 0.028 0.004 0.012 θ Note 1. Plastic or metal protrusions of 0.15 mm maximum per side are not included. REFERENCES OUTLINE VERSION IEC JEDEC SOT109-1 076E07S MS-012AC 1999 Jun 30 EIAJ EUROPEAN PROJECTION ISSUE DATE 95-01-23 97-05-22 9 o 8 0o Philips Semiconductors Product specification 8-stage shift-and-store register LED driver HEF4794B DIP16: plastic dual in-line package; 16 leads (300 mil); long body SOT38-1 ME seating plane D A2 A A1 L c e Z b1 w M (e 1) b MH 9 16 pin 1 index E 1 8 0 5 10 mm scale DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT A max. A1 min. A2 max. b b1 c D (1) E (1) e e1 L ME MH w Z (1) max. mm 4.7 0.51 3.7 1.40 1.14 0.53 0.38 0.32 0.23 21.8 21.4 6.48 6.20 2.54 7.62 3.9 3.4 8.25 7.80 9.5 8.3 0.254 2.2 inches 0.19 0.020 0.15 0.055 0.045 0.021 0.015 0.013 0.009 0.86 0.84 0.26 0.24 0.10 0.30 0.15 0.13 0.32 0.31 0.37 0.33 0.01 0.087 Note 1. Plastic or metal protrusions of 0.25 mm maximum per side are not included. REFERENCES OUTLINE VERSION IEC JEDEC SOT38-1 050G09 MO-001AE 1999 Jun 30 EIAJ EUROPEAN PROJECTION ISSUE DATE 92-10-02 95-01-19 10 Philips Semiconductors Product specification 8-stage shift-and-store register LED driver HEF4794B Typical reflow peak temperatures range from 215 to 250 °C. The top-surface temperature of the packages should preferable be kept below 230 °C. SOLDERING Introduction This text gives a very brief insight to a complex technology. A more in-depth account of soldering ICs can be found in our “Data Handbook IC26; Integrated Circuit Packages” (document order number 9398 652 90011). WAVE SOLDERING Conventional single wave soldering is not recommended for surface mount devices (SMDs) or printed-circuit boards with a high component density, as solder bridging and non-wetting can present major problems. There is no soldering method that is ideal for all IC packages. Wave soldering is often preferred when through-hole and surface mount components are mixed on one printed-circuit board. However, wave soldering is not always suitable for surface mount ICs, or for printed-circuit boards with high population densities. In these situations reflow soldering is often used. To overcome these problems the double-wave soldering method was specifically developed. If wave soldering is used the following conditions must be observed for optimal results: • Use a double-wave soldering method comprising a turbulent wave with high upward pressure followed by a smooth laminar wave. Through-hole mount packages SOLDERING BY DIPPING OR BY SOLDER WAVE • For packages with leads on two sides and a pitch (e): The maximum permissible temperature of the solder is 260 °C; solder at this temperature must not be in contact with the joints for more than 5 seconds. The total contact time of successive solder waves must not exceed 5 seconds. – larger than or equal to 1.27 mm, the footprint longitudinal axis is preferred to be parallel to the transport direction of the printed-circuit board; – smaller than 1.27 mm, the footprint longitudinal axis must be parallel to the transport direction of the printed-circuit board. The device may be mounted up to the seating plane, but the temperature of the plastic body must not exceed the specified maximum storage temperature (Tstg(max)). If the printed-circuit board has been pre-heated, forced cooling may be necessary immediately after soldering to keep the temperature within the permissible limit. The footprint must incorporate solder thieves at the downstream end. • For packages with leads on four sides, the footprint must be placed at a 45° angle to the transport direction of the printed-circuit board. The footprint must incorporate solder thieves downstream and at the side corners. MANUAL SOLDERING Apply the soldering iron (24 V or less) to the lead(s) of the package, either below the seating plane or not more than 2 mm above it. If the temperature of the soldering iron bit is less than 300 °C it may remain in contact for up to 10 seconds. If the bit temperature is between 300 and 400 °C, contact may be up to 5 seconds. During placement and before soldering, the package must be fixed with a droplet of adhesive. The adhesive can be applied by screen printing, pin transfer or syringe dispensing. The package can be soldered after the adhesive is cured. Typical dwell time is 4 seconds at 250 °C. A mildly-activated flux will eliminate the need for removal of corrosive residues in most applications. Surface mount packages REFLOW SOLDERING MANUAL SOLDERING Reflow soldering requires solder paste (a suspension of fine solder particles, flux and binding agent) to be applied to the printed-circuit board by screen printing, stencilling or pressure-syringe dispensing before package placement. Fix the component by first soldering two diagonally-opposite end leads. Use a low voltage (24 V or less) soldering iron applied to the flat part of the lead. Contact time must be limited to 10 seconds at up to 300 °C. Several methods exist for reflowing; for example, infrared/convection heating in a conveyor type oven. Throughput times (preheating, soldering and cooling) vary between 100 and 200 seconds depending on heating method. 1999 Jun 30 When using a dedicated tool, all other leads can be soldered in one operation within 2 to 5 seconds between 270 and 320 °C. 11 Philips Semiconductors Product specification 8-stage shift-and-store register LED driver HEF4794B Suitability of IC packages for wave, reflow and dipping soldering methods SOLDERING METHOD MOUNTING PACKAGE WAVE REFLOW(1) DIPPING Through-hole mount DBS, DIP, HDIP, SDIP, SIL suitable(2) − suitable Surface mount not suitable suitable − suitable − BGA, SQFP suitable(3) HLQFP, HSQFP, HSOP, HTQFP, HTSSOP, SMS not PLCC(4), SO, SOJ suitable LQFP, QFP, TQFP SSOP, TSSOP, VSO suitable − not recommended(4)(5) suitable − not recommended(6) suitable − Notes 1. All surface mount (SMD) packages are moisture sensitive. Depending upon the moisture content, the maximum temperature (with respect to time) and body size of the package, there is a risk that internal or external package cracks may occur due to vaporization of the moisture in them (the so called popcorn effect). For details, refer to the Drypack information in the “Data Handbook IC26; Integrated Circuit Packages; Section: Packing Methods”. 2. For SDIP packages, the longitudinal axis must be parallel to the transport direction of the printed-circuit board. 3. These packages are not suitable for wave soldering as a solder joint between the printed-circuit board and heatsink (at bottom version) can not be achieved, and as solder may stick to the heatsink (on top version). 4. If wave soldering is considered, then the package must be placed at a 45° angle to the solder wave direction. The package footprint must incorporate solder thieves downstream and at the side corners. 5. Wave soldering is only suitable for LQFP, QFP and TQFP packages with a pitch (e) equal to or larger than 0.8 mm; it is definitely not suitable for packages with a pitch (e) equal to or smaller than 0.65 mm. 6. Wave soldering is only suitable for SSOP and TSSOP packages with a pitch (e) equal to or larger than 0.65 mm; it is definitely not suitable for packages with a pitch (e) equal to or smaller than 0.5 mm. 1999 Jun 30 12 Philips Semiconductors Product specification 8-stage shift-and-store register LED driver HEF4794B DEFINITIONS Data sheet status Objective specification This data sheet contains target or goal specifications for product development. Preliminary specification This data sheet contains preliminary data; supplementary data may be published later. Product specification This data sheet contains final product specifications. Limiting values Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information Where application information is given, it is advisory and does not form part of the specification. LIFE SUPPORT APPLICATIONS These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such improper use or sale. 1999 Jun 30 13 Philips Semiconductors Product specification 8-stage shift-and-store register LED driver NOTES 1999 Jun 30 14 HEF4794B Philips Semiconductors Product specification 8-stage shift-and-store register LED driver NOTES 1999 Jun 30 15 HEF4794B Philips Semiconductors – a worldwide company Argentina: see South America Australia: 34 Waterloo Road, NORTH RYDE, NSW 2113, Tel. +61 2 9805 4455, Fax. +61 2 9805 4466 Austria: Computerstr. 6, A-1101 WIEN, P.O. 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Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights. Printed in The Netherlands 245002/02/pp16 Date of release: 1999 Jun 30 Document order number: 9397 750 06151