DN8643S 24-bit Shift Register Latch Driver IC ■ Overview Unit : mm 18 19 15.2±0.3 0.35±0.25 36 1.3±0.25 Breakdown : 30V Output current : 120mA • Surface mountable USONF-36D package (pin pitch : 0.8mm) + 0.1 8.4±0.3 11.93±0.3 0.2 – 0.05 0.5 2.85±0.2 0.1±0.1 ■ Features • Serial-in and serial-out/parallel-out • Cascade connection allowed • Built-in output malfunctioning preventive circuit • Low current at stanby ICC=≤100µA • High-breakdown, large current drive type output steps 1 0.8 The DN8643S is an IC which incorporates a 24-bit shift register and a latch driver to meet high-speed operation, low power consumption and high-density printout of the thermal printers for the work processors, and so on. It employs the BiCMOS process in which the serial-in and serial-out/parallel-out functions are incorporated, the 24-step shift register block and latch block are composed of CMOS, and the 24-step parallel driver block is bipolar. 1.3±0.25 36-pin PANAFLAT Plastic Package (SSOP036-P-0450) ■ Block Diagram SIN 17 CLK 18 STB 19 EN D Q D Q D Q D Q D Q CP CP CP CP CP L D L D L D L D L D Q Q Q Q 20 SOUT 36 VCC Q Output Malfunction Protector 1 GND 8, 9, 10 27, 28, 29 16 15 14 22 21 Q1 Q2 Q3 Q23 Q24 ■ Absolute Maximum Ratings (Ta=25˚C) Parameter Symbol Rating Unit V Supply voltage VCC 0 to 7 Output voltage VO 0 to 30 Output current IO mA V Power dissipation PD 120 1.3 * Operating ambient temperature Topr –20 to + 75 ˚C Storage temperature Tstg –55 to + 125 ˚C W * When mounting onto the PCB, power dissipation is reduced at a rate of 10.4mW/˚C from Ta=25˚C ■ Recommended Operating Range (Ta=25˚C) Parameter Symbol Supply voltage VCC Output voltage VO Output current * IO Clock frequency fCLK CLK Input pulse width SIN SIN max 5 Input Duty 40 to 60% th STB typ 4 tsu STB Hold time mim tw STB Setup time Condition Unit 6 V 30 V 100 mA 10 MHz 40 ns 40 ns 30 ns 40 ns 20 ns 0 ns Clock pulse rise time tr 500 ns Clock pulse fall time tf 500 ns * An allowable value changes depends on the number of simultaneously turned-on circuits and the duty. Use with power dissipation taken into full account. ■ Electrical Characteristics (Ta=25˚C) Parameter Symbol VIH Input voltage VIL IIH Input current IIL Output voltage Output current Output saturation voltage Condition min VCC=4 to 6V max Unit VCC 0 0.3VCC V 25 µA –25 µA VIH=5V VIL=0V V VOH IO= –1µA VOL IO=1µA IOH VOH=4.5V –4 mA IOL VOL=0.4V 4 mA 4.9 V 0.1 V VCE (sat) 1 IOL=100mA 0.4 VCE (sat) 2 IOL=80mA 0.35 V Output leakage current Supply current Output malfunctioning preventive circuit operating voltage * V IOLK1 VO=30V (output OFF) 50 µA IOLK2 VO=15V (output Off) 25 µA ICC1 Total driver output OFF ICC2 Driver output 1 circuit ON 100 µA 5 mA VCCT+ 2.9 3.9 V VCCT– 2.6 3.6 V * Output malfunctioning preventive circuit operating voltage timing chart VCC VCCT+ VCCT– Driver output typ 0.7VCC Enable OFF Enable ■ Switching Characteristics (Ta=25˚C) Parameter Symbol Input fmax CLK Maximum clock frequency tPLH tPHL tPLH Propagation delay time tPHL Condition Output min typ CLK SOUT CLK Qn EN tPHL Qn MHz 100 ns CL=15pF 100 ns VCC=5V CL=15pF ■ Timing Chart 1. Input Timing 1/fCLK tWH (CLK) tWL (CLK) 90% 90% CLK 2.5V 10% 2.5V 10% tf (CLK) th (CLK) 2.5V tsu (SIN) th (SIN) SIN 2.5V A.B.C 2.5V 2.5V 2.5V tsu (SIN) th (SIN) STB th (STB) tsu (STB) 2.5V 2.5V tw (STB) 2. Propagation Delay Time CLK 2.5V 2.5V tPLH 2.5V SOUT 2.5V tPHL 2.5V EN 2.5V tPLH Q1 to Q24 tPLH 2.5V 2.5V tPHL Unit VCC=5V RL=100Ω tPLH max 10 2.5V 2.5V tPHL 2 µs 0.5 µs 2 µs 0.5 µs ■ Pin Assignments EN 1 36 VCC Q12 2 35 Q13 Q11 3 34 Q14 Q10 4 33 Q15 Q9 5 32 Q16 Q8 6 31 Q17 Q7 7 30 Q18 GND 8 29 GND GND 9 28 GND GND 10 27 GND Q6 11 26 Q19 Q5 12 25 Q20 Q4 13 24 Q21 Q3 14 23 Q22 Q2 15 22 Q23 Q1 16 21 Q24 SIN 17 20 SOUT CLK 18 19 STB DN8643S (Top View) ■ Functions Table Input Driver output SOUT CLK EN STB SIN Ql Qn ↑ H × × H H ↓ H × × H H nc ↑ L L × nc nc Q'23 ↑ L H L H Qn–1 Q'23 ↑ L H H L Qn–1 Q'23 ↓ L H × nc nc nc Note) H=High level, L=Low level, × = Either “H” or “L” will do, ↑ = Transition from “H” or “L” , ↓ = Transition from “H” to “L” , nc=No change, Q'23=Status of the 23rd shift register Q'23