INTEGRATED CIRCUITS DATA SHEET For a complete data sheet, please also download: • The IC04 LOCMOS HE4000B Logic Family Specifications HEF, HEC • The IC04 LOCMOS HE4000B Logic Package Outlines/Information HEF, HEC HEF4894B 12-stage shift-and-store register LED driver Product specification File under Integrated Circuits, IC04 January 1995 Philips Semiconductors Product specification 12-stage shift-and-store register LED driver APPLICATIONS HEF4894B ORDERING AND PACKAGE INFORMATION • Automotive GENERAL DESCRIPTION The HEF4894B is a 12 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 O11. Data is shifted on positive-going clock transitions. The data in each shift register stage is 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. Two serial outputs (Os and Os’) are available for cascading a number of HEF4894B 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 HEF4894B devices when the clock rise time is slow. PACKAGES TYPE NUMBER PINS PIN POSITION MATERIAL CODE HEF4894BT 20 SO plastic SO20/SOT163A HEF4894BP 20 DIL plastic DIL20/SOT146 • Industrial PINNING PIN SYMBOL NAME AND FUNCTION 1 STR strobe input 2 D data input 3 CP clock input 4, 5, 6, 7, 8, 9, 18, O0 to O11 17, 16, 15, 14, 13 parallel outputs (open drain) 10 Vss ground 11, 12 Os, Os’ serial outputs 19 EO output enable input 20 VDD positive supply voltage FAMILY DATA See Family Specifications except for: Rating for DC current into any open-drain output: 40 mA. IDD LIMITS category MSI: see Family Specifications. Preliminary pin assignment. Fig.1 Pinning diagram. January 1995 Fig.2 Functional diagram. 2 Philips Semiconductors Product specification 12-stage shift-and-store register LED driver HEF4894B Fig.3 Logic diagram. FUNCTION TABLE PARALLEL OUTPUTS INPUTS Fig.4 One D-latch. SERIAL OUTPUTS CP EO STR D O0 On OS OS’ ↑ L X X Z Z O10’ nc ↓ L X X Z Z nc O11 ↑ H L X nc nc O10’ nc ↑ H H L Z On − 1 O10’ nc ↑ H H H L On − 1 O10’ nc ↓ H H H nc nc nc O11 Notes 1. H = HIGH state (the more positive voltage) 2. L = LOW state (the less positive voltage) 3. X = state is immaterial 4. ↑ = positive-going transition 5. ↓ = negative-going transition 6. Z = high impedance OFF state 7. nc = no change 8. O11’ = the information in the twelfth shift register stage. At the positive clock edge the information in the 10th register stage is transferred to the 11th register stage and the Os output. January 1995 3 Philips Semiconductors Product specification 12-stage shift-and-store register LED driver HEF4894B DC CHARACTERISTICS VSS = 0 V. Tamb (°C) PARAMETER VDD (V) output voltage LOW; On 5 + 25 + 85 UNIT MIN. MAX. MIN. MAX. MIN. MAX. − 0.75 − 0.75 − 1.5 VOL 10 − 0.75 − 0.75 − 1.5 15 − 0.75 − 0.75 − 1.5 − 2 − 2 − 15 10 − 2 − 2 − 15 15 − 2 − 2 − 15 output leakage current; HIGH; On −40 SYMBOL 5 IOZH V CONDITIONS VI = VSS or VDD; Io < 20 mA µA Vo = 15 V AC CHARACTERISTICS VSS = 0 V; Tamb = 25 °C; input transition times ≤ 20 ns. VDD (V) TYPICAL FORMULA FOR P (µW) 5 1200 fi + ∑(foCL) × VDD2 where: dissipation per package 10 5550 fi + ∑(foCL) × Rload = ∞ (P) 15 15000 fi + ∑(foCL) × PARAMETER Dynamic power VDD2 VDD2 fi = input frequency (MHz), fo = output frequency (MHz), CL = load capacitance (pF), ∑(foCL) = sum of outputs VDD = supply voltage (V) AC CHARACTERISTICS VSS = 0 V; Tamb = 25 °C; CL = 50 pF; input transition times ≤ 20 ns. PARAMETER VDD (V) Propagation delay 5 CP to Os 10 HIGH to LOW 15 Propagation delay 5 CP to Os 10 LOW to HIGH 15 Propagation delay 5 CP to Os’ 10 HIGH to LOW 15 Propagation delay 5 CP to Os’ 10 LOW to HIGH 15 January 1995 SYMBOL tPHL tPLH tPHL tPLH TYP. MAX. 160 320 65 130 45 90 130 260 55 110 40 80 120 240 50 100 40 80 130 260 60 120 45 90 4 UNIT TYPICAL EXTRAPOLATION FORMULA 132 ns + (0.55 ns/pF) CL ns 53 ns + (0.23 ns/pF) CL 37 ns + (0.16 ns/pF) CL 102 ns + (0.55 ns/pF) CL ns 44 ns + (0.23 ns/pF) CL 32 ns + (0.16 ns/pF) CL 92 ns + (0.55 ns/pF) CL ns 39 ns + (0.23 ns/pF) CL 32 ns + (0.16 ns/pF) CL 102 ns + (0.55 ns/pF) CL ns 49 ns + (0.23 ns/pF) CL 37 ns + (0.16 ns/pF) CL Philips Semiconductors Product specification 12-stage shift-and-store register LED driver PARAMETER Propagation delay VDD (V) SYMBOL 5 TYP. MAX. 240 480 CP to On 10 80 160 OFF to LOW 15 55 110 Propagation delay 5 170 340 tPZL HEF4894B UNIT TYPICAL EXTRAPOLATION FORMULA ns see note 1 ns see note 1 ns see note 1 ns see note 1 CP to On 10 75 150 LOW to OFF 15 60 120 Propagation delay 5 140 280 STR to On 10 70 140 OFF to LOW 15 55 110 Propagation delay 5 100 200 STR to On 10 40 100 LOW to OFF 15 35 70 Output transition 5 85 170 time; Os, Os’ 10 40 80 HIGH to LOW 15 30 60 16 ns + (0.28 ns/pF) CL Output transition 5 85 170 35 ns + (1.0 ns/pF) CL time; Os, Os’ 10 40 80 LOW to HIGH 15 30 60 tPLZ tPZL tPLZ tTHL tTLH 35 ns + (1.0 ns/pF) CL ns ns 19 ns + (0.42 ns/pF) CL 19 ns + (0.42 ns/pF) CL 16 ns + (0.28 ns/pF) CL Note 1. Definition of symbol equivalent to 3-state outputs. AC CHARACTERISTICS VSS = 0 V; Tamb = 25 °C; CL = 50 pF; input transition times ≤ 20 ns. PARAMETER VDD (V) SYMBOL MIN. TYP. MAX. output enable time 5 − 100 200 EO to On 10 − 55 110 OFF to LOW 15 − 50 100 tPZL output disable time 5 − 80 160 EO to On 10 − 40 80 LOW to OFF 15 − 30 60 tPLZ minimum clock pulse width 5 60 30 − LOW 10 30 15 − 15 24 12 − 80 40 − tWCPL minimum strobe pulse width 5 HIGH 10 60 30 − 15 24 12 − January 1995 tWSTRH 5 UNIT ns ns ns ns Philips Semiconductors Product specification 12-stage shift-and-store register LED driver PARAMETER VDD (V) SYMBOL tsu HEF4894B MIN. TYP. MAX. 60 30 − set-up time 5 D to CP 10 20 10 − 15 15 5 − 5 −15 − hold time 5 D to CP 10 20 5 − 15 20 5 − 5 10 − 10 11 22 − 15 14 28 − Maximum clock pulse frequency 5 thold fmax Fig.5 Timing diagram. January 1995 6 UNIT ns ns MHz Philips Semiconductors Product specification 12-stage shift-and-store register LED driver APPLICATION INFORMATION An example of applications for the HEF4894B is: • Serial-to-parallel converting LED driver Fig.6 LED driver register. January 1995 7 HEF4894B