S-4670A. 128-bit THERMAL HEAD DRIVER FEATURES BLOCK DIAGRAM. Rev. 1.1

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Rev. 1.1 128-bit THERMAL HEAD DRIVER S-4670A The S-4670A is a CMOS thermal head driver containing 128-bit (64 x 2) shift registers and latches. High speed operation at 16 MHz clock frequency together with 2-divisible shift registers driven in each 64 bits makes the S-4670A best for applications such as video printers and graphic thermal print heads FEATURES Low current consumption: 0.6 ma typ. Driver output withstand voltage: 36 V max. (fclk = 4 MHz; the SI pin is fixed) Driver output current: 15 ma typ. High speed operation: 128-bit shift registers and latches are built in. 16 MHz max. (a single die) 1-division driver enable function at 128 bits 16 MHz max. (cascade connection) 2-division driver enable function at every 64 bits Driver OFF function when supply voltage drops. [64 bits x 2/128 bits x 1] shift register switching function BLOCK DIAGRAM DO 1 DO 64 DO 65 DO 128 V DD AEN1 BEN AEN2 LCHX SI1 SW SO2 CLK SO1 SI2 SW Figure 1 Block Diagram Seiko Instruments Inc. 1

128-bit THERMAL HEAD DRIVER S-4670A Rev. 1.1 OPERATION When the SW pin is at L level, the shift register reads data, which is input in the SI1 pin at the rising edge of the clock input, in bits 1 through 128 of the shift register. Fix the SI2 pin when not in use to or VDD. When the SW pin is at H level or open, the shift register reads data which is input in the SI1 or SI2 pin at the rising edge of the clock input. Data at the SI1 pin is read in bits 1 through 64 of the shift register; data at the SI2 pin is read in bits 65 through 128 of the shift register. The latch circuit reads data of the shift register when the LCHX pin is at L level, and retains the preceding data of the shift register when the LCHX pin is at H level. The latch data is output to the driver when pins AEN1 and AEN2 are at L level and the BEN pin is at H level. The driver output transistor is turned ON and OFF when the latch data is at H level and at L level, respectively. All driver output transistors to be controlled are turned OFF by setting pins AEN1 and AEN2 to "H level or the BEN pin to "L level. The AEN1 pin, AEN2 pin and BEN pin control the driver output bits 1 through 64, 65 through 128 and 1 through 128, respectively. While the power voltage is transiting from 0 to 5 V and vice versa, the driver output transistors are forcibly turned OFF. 2 Seiko Instruments Inc.

Rev. 1.1 128-bit THERMAL HEAD DRIVER S-4670A DESCRIPTION OF PINS Note: For pin assignment, refer to Figure 3, Outline and Dimensions. Table 1 Description of Pins No. Name Description 1 to 128 DO1 to DO128 Driver output pins (Nch open-drain output) 142, 148 SO1, SO2 Serial data output pin for 64 bits 2 shift registers 141 BEN Driver enable input pin; Outputs the latch data (DO1 through DO128) to the driver when the BEN is at H level (a pull-down resistor with Rp =300 kω typ. is built in). 129 to 136 pin (0 V) 139, 147 VDD Positive power supply pin (+5 V) 140 146 AEN1 AEN2 Driver enable input pins: The AEN1 and AEN2 output the latch data (DO1 through DO64 and DO65 through DO128, respectively) to the driver when AEN1 or AEN2 is at L level (a pullup resistor with Rp =300 kω typ. is built in). 145 LCHX Data latch signal input pin: LCHX = L : Reads data of the shift register. LCHX = H : Retains the preceding data. 138 CLK Clock input pin of the 64 bits x 2 shift register 143 SW 64 bits x 2/128 bits x 1 shift register switching input pin (a pull-up resistor with Rp =300 kω typ. is built in). SW = H or open: 64 bits x 2 shift register SW = L : 128 bits x 1 shift register Input from the SI2 is not available. 137 144 SI1 SI2 Serial data input pin of the 64 bits x 2 shift register. Input conditions can be selected by the SW pin: SW = H or open: SI1 = Serial data input pin for DO1 through DO64 SI2 = Serial data input pin for DO65 through DO128 SW = L : SI1 = Serial data input pin for DO1 through DO128. Fix the SI2 pin to or VDD. ABSOLUTE MAXIMUM RATINGS Table 2 Absolute Maximum Ratings Name Symbol Standard Unit Power Supply Voltage to V DD -0.4 to 7.0 V Driver Output Withstand Voltage V DOH 36 V Driver Output Current I DOL 24 ma Input Voltage VIN -0.5 to V DD +0.5 V Output Voltage VOUT -0.5 to V DD +0.5 V Maximum Junction Temperature Tjmax 125 C Operating Temperature Range Topr -10 to +80 C Storage Temperature Range Tstg -40 to +125 C Seiko Instruments Inc. 3

128-bit THERMAL HEAD DRIVER S-4670A Rev. 1.1 DC ELECTRICAL CHARACTERISTICS Table 3 DC Electrical Characteristics V DD = 5.0 V ± 10%, Ta = -10 to +80 C unless otherwise specified Name Symbol Conditions Min. Typ. Max. Unit Power Supply Voltage V DD 4.5 5.0 5.5 V Driver High Output V DOH Heater resistance: RL= 2 kω min. 24 28 V Voltage Heater resistance: RL= 5 kω min. 32 High Level Input Voltage V IH CLK: f CLK = fmax duty 50% T SUD =T HD = 100 nsec SI1, SI2: f SI = 1/2 fmax Low Level Input Voltage V IL LCHX: T W = 100 nsec AEN1, AEN2, BEN, SW: DC level 0.8 V DD V DD V 0.2 V DD V High Level Input I IH BEN Note1 V IH = V DD 17 55 µa Current Other pins excl. BEN V IH = V DD 0.5 µa Low Level Input Current I IL AEN1, AEN2, SW Note2 V IL = -55-17 µa Other pins excl. AEN1, AEN2, -0.5 µa SW V IL = High Level Output Voltage V OH SO1, SO2 I OH = -0.5 ma 4.1 V Low Level Output V OL SO1, SO2 I OL = 0.5 ma 0.4 V Voltage Driver Low Output V DOL V DD = 5.0 V I OL = 15 ma 0.8 1.6 V Voltage Driver Leakage Current I LEAK V DOH = 28 V 1.0 µa Current Consumption I DD f CLK = 4 MH Z 0.6 1.5 ma SI1, SI2: fixed; SW: open f CLK = 4 MH Z 2.2 3.5 ma SI1, SI2: HLHL; SW: open Current Consumption During Standby I S CLK, LCHX: ; Other input pins: open 0.1 0.3 ma Low Power Supply Voltage Detecting Circuit SI1, SI2: fixed V DET 0.8 2.8 4.0 V Note1 Note2 A pull-down resistor is built in. A pull-up resistor is built in. 4 Seiko Instruments Inc.

Rev. 1.1 128-bit THERMAL HEAD DRIVER S-4670A AC ELECTRICAL CHARACTERISTICS Table 4 AC Electrical Characteristics V DD = 5.0 V ± 10%, Ta = -10 to +80 C unless otherwise specified Name Symbol Conditions Min. Typ. Max. Unit CLK Pulse Width T WCLK V IH = V DD, V IL = 0 V; 30 nsec Rising and falling edges at 10 nsec or lower; Output load RL = 1 MΩ CL = 3 pf Data Setup Time T SUD 20 nsec Data Hold Time T HD 20 nsec Latch Pulse Width T W 30 nsec Latch Setup Time T SU 30 nsec Latch Hold Time T HD 30 nsec CLK-SO Propagation T DSO 25 40 nsec Delay Time EN-D0n Propagation T DDO V DOH = 24 V 1.0 µsec Delay Time RL = 3000 Ω D0n Rising Time T RDO V DOH = 24 V 80 200 nsec RL = 3000 Ω D0n Falling Time T FDO V DOH = 24 V 80 200 nsec RL = 3000 Ω Clock Frequency f CLK Single die 16 MHz Cascade connection 16 MHz TIMING CHART 1/f CLK CLK TWCLK SI1,2 LCHX SO1,2 AEN1,2 "%. TSUD TDSO THD TSU TW THD DOn TDDO 90% 50% TDD 10% TFDO TRDO Figure 2 Timing Chart Seiko Instruments Inc. 5

128-bit THERMAL HEAD DRIVER S-4670A Rev. 1.1 QUALITY STANDARD Table 5 Reliability Assessment Testing Specifications No. Test Item Testing Conditions Test Time or Frequency 1 High Temperature and High Humidity Bias Ta = 85 C, RH = 85 %, Vabs. Max Note 1 0.9 2 High Temperature Bias Ta = 125 C, Vabs. max Note1 0.9 3 High Temperature Operation 4 Static Electricity Resistance LTFR 1000 h 10% 1000 h 10% Ta = 125 C 1000 h 10% Vopr. max Note2 C = 200 pf, V = 200 V, V SS (or ), V DD (or V CC ) as reference; Positive/Negative Once - 5 Latch-up V =±100 V, C = 200 pf, V = Vopr. max Note2 Once - Note1 Note2 Vabs. max : Absolute maximum rating Vopr. max : Maximum operating voltage Remark: Test samples are encapsuled in standard ceramic packages (resin is coated at humidity resistance test). 6 Seiko Instruments Inc.

Rev. 1.1 128-bit THERMAL HEAD DRIVER S-4670A COORDINATES AND DIMENSIONS Remark: Table 6-1 Pad Coordinates The origin is at the center of the die. No. Pin name Coordinates No. Pin name Coordinates 1 DO1 ( -3683.0, 218.5 ) 43 DO43 ( -1247.0, 218.5 ) 2 DO2 ( -3625.0, 317.5 ) 44 DO44 ( -1189.0, 317.5 ) 3 DO3 ( -3567.0, 218.5 ) 45 DO45 ( -1131.0, 218.5 ) 4 DO4 ( -3509.0, 317.5 ) 46 DO46 ( -1073.0, 317.5 ) 5 DO5 ( -3451.0, 218.5 ) 47 DO47 ( -1015.0, 218.5 ) 6 DO6 ( -3393.0, 317.5 ) 48 DO48 ( -957.0, 317.5 ) 7 DO7 ( -3335.0, 218.5 ) 49 DO49 ( -899.0, 218.5 ) 8 DO8 ( -3277.0, 317.5 ) 50 DO50 ( -841.0, 317.5 ) 9 DO9 ( -3219.0, 218.5 ) 51 DO51 ( -783.0, 218.5 ) 10 DO10 ( -3161.0, 317.5 ) 52 DO52 ( -725.0, 317.5 ) 11 DO11 ( -3103.0, 218.5 ) 53 DO53 ( -667.0, 218.5 ) 12 DO12 ( -3045.0, 317.5 ) 54 DO54 ( -609.0, 317.5 ) 13 DO13 ( -2987.0, 218.5 ) 55 DO55 ( -551.0, 218.5 ) 14 DO14 ( -2929.0, 317.5 ) 56 DO56 ( -493.0, 317.5 ) 15 DO15 ( -2871.0, 218.5 ) 57 DO57 ( -435.0, 218.5 ) 16 DO16 ( -2813.0, 317.5 ) 58 DO58 ( -377.0, 317.5 ) 17 DO17 ( -2755.0, 218.5 ) 59 DO59 ( -319.0, 218.5 ) 18 DO18 ( -2697.0, 317.5 ) 60 DO60 ( -261.0, 317.5 ) 19 DO19 ( -2639.0, 218.5 ) 61 DO61 ( -203.0, 218.5 ) 20 DO20 ( -2581.0, 317.5 ) 62 DO62 ( -145.0, 317.5 ) 21 DO21 ( -2523.0, 218.5 ) 63 DO63 ( -87.0, 218.5 ) 22 DO22 ( -2465.0, 317.5 ) 64 DO64 ( -29.0, 317.5 ) 23 DO23 ( -2407.0, 218.5 ) 65 DO65 ( 29.0, 218.5 ) 24 DO24 ( -2349.0, 317.5 ) 66 DO66 ( 87.0, 317.5 ) 25 DO25 ( -2291.0, 218.5 ) 67 DO67 ( 145.0, 218.5 ) 26 DO26 ( -2233.0, 317.5 ) 68 DO68 ( 203.0, 317.5 ) 27 DO27 ( -2175.0, 218.5 ) 69 DO69 ( 261.0, 218.5 ) 28 DO28 ( -2117.0, 317.5 ) 70 DO70 ( 319.0, 317.5 ) 29 DO29 ( -2059.0, 218.5 ) 71 DO71 ( 377.0, 218.5 ) 30 DO30 ( -2001.0, 317.5 ) 72 DO72 ( 435.0, 317.5 ) 31 DO31 ( -1943.0, 218.5 ) 73 DO73 ( 493.0, 218.5 ) 32 DO32 ( -1885.0, 317.5 ) 74 DO74 ( 551.0, 317.5 ) 33 DO33 ( -1827.0, 218.5 ) 75 DO75 ( 609.0, 218.5 ) 34 DO34 ( -1769.0, 317.5 ) 76 DO76 ( 667.0, 317.5 ) 35 DO35 ( -1711.0, 218.5 ) 77 DO77 ( 725.0, 218.5 ) 36 DO36 ( -1653.0, 317.5 ) 78 DO78 ( 783.0, 317.5 ) 37 DO37 ( -1595.0, 218.5 ) 79 DO79 ( 841.0, 218.5 ) 38 DO38 ( -1537.0, 317.5 ) 80 DO80 ( 899.0, 317.5 ) 39 DO39 ( -1479.0, 218.5 ) 81 DO81 ( 957.0, 218.5 ) 40 DO40 ( -1421.0, 317.5 ) 82 DO82 ( 1015.0, 317.5 ) 41 DO41 ( -1363.0, 218.5 ) 83 DO83 ( 1073.0, 218.5 ) 42 DO42 ( -1305.0, 317.5 ) 84 DO84 ( 1131.0, 317.5 ) Seiko Instruments Inc. 7

128-bit THERMAL HEAD DRIVER S-4670A Rev. 1.1 Table 6-2 Pad Coordinates No. Pin name Coordinates No. Pin name Coordinates 85 DO85 ( 1189.0, 218.5 ) 127 DO127 ( 3625.0, 218.5 ) 86 DO86 ( 1247.0, 317.5 ) 128 DO128 ( 3683.0, 317.5 ) 87 DO87 ( 1305.0, 218.5 ) 129 ( 3248.0, -38.0 ) 88 DO88 ( 1363.0, 317.5 ) 130 ( 2320.0, -38.0 ) 89 DO89 ( 1421.0, 218.5 ) 131 ( 1392.0, -38.0 ) 90 DO90 ( 1479.0, 317.5 ) 132 ( 464.0, -38.0 ) 91 DO91 ( 1537.0, 218.5 ) 133 ( -464.0, -38.0 ) 92 DO92 ( 1595.0, 317.5 ) 134 ( -1392.0, -38.0 ) 93 DO93 ( 1653.0, 218.5 ) 135 ( -2320.0, -38.0 ) 94 DO94 ( 1711.0, 317.5 ) 136 ( -3248.0, -38.0 ) 95 DO95 ( 1769.0, 218.5 ) 137 SI1 ( -2898.0, -319.0 ) 96 DO96 ( 1827.0, 317.5 ) 138 CLK ( -2756.0, -319.0 ) 97 DO97 ( 1885.0, 218.5 ) 139 VDD ( -2065.0, -292.0 ) 98 DO98 ( 1943.0, 317.5 ) 140 AEN1 ( -1672.0, -319.0 ) 99 DO99 ( 2001.0, 218.5 ) 141 BEN ( -866.0, -319.0 ) 100 DO100 ( 2059.0, 317.5 ) 142 SO1 ( -105.0, -319.0 ) 101 DO101 ( 2117.0, 218.5 ) 143 SW ( 184.0, -319.0 ) 102 DO102 ( 2175.0, 317.5 ) 144 SI2 ( 1069.0, -319.0 ) 103 DO103 ( 2233.0, 218.5 ) 145 LCHX ( 1695.0, -319.0 ) 104 DO104 ( 2291.0, 317.5 ) 146 AEN2 ( 2040.0, -319.0 ) 105 DO105 ( 2349.0, 218.5 ) 147 VDD ( 2610.0, -292.0 ) 106 DO106 ( 2407.0, 317.5 ) 148 SO2 ( 2838.0, -319.0 ) 107 DO107 ( 2465.0, 218.5 ) 108 DO108 ( 2523.0, 317.5 ) 109 DO109 ( 2581.0, 218.5 ) 110 DO110 ( 2639.0, 317.5 ) 111 DO111 ( 2697.0, 218.5 ) 112 DO112 ( 2755.0, 317.5 ) 113 DO113 ( 2813.0, 218.5 ) 114 DO114 ( 2871.0, 317.5 ) 115 DO115 ( 2929.0, 218.5 ) 116 DO116 ( 2987.0, 317.5 ) 117 DO117 ( 3045.0, 218.5 ) 118 DO118 ( 3103.0, 317.5 ) 119 DO119 ( 3161.0, 218.5 ) 120 DO120 ( 3219.0, 317.5 ) 121 DO121 ( 3277.0, 218.5 ) 122 DO122 ( 3335.0, 317.5 ) 123 DO123 ( 3393.0, 218.5 ) 124 DO124 ( 3451.0, 317.5 ) 125 DO125 ( 3509.0, 218.5 ) 126 DO126 ( 3567.0, 317.5 ) * Pad size is 80µm by 80µm 8 Seiko Instruments Inc.

Rev. 1.1 128-bit THERMAL HEAD DRIVER S-4670A DO128 99 128 129 SO2 148 VDD 147 130 AEN2 146 LCHX 145 131 SI2 144 Pad size: Driver pads 80µm 80µm(passivation opening) Other pads 80µm 80µm(passivation opening) 132 SW 143 SO1 142 133 BEN 141 7.65mm Die thickness: 300±30µm 134 140 AEN VDD 139 135 CLK 138 4 80 20 SI1 137 136 * The die size used here is the value prior to dicing. 58 4 58 99 DO2 DO1 2 1 0.81 mm Fig. 3 Physical Dimensions Seiko Instruments Inc. 9

The information described herein is subject to change without notice. Seiko Instruments Inc. is not responsible for any problems caused by circuits or diagrams described herein whose related industrial properties, patents, or other rights belong to third parties. The application circuit examples explain typical applications of the products, and do not guarantee the success of any specific mass-production design. When the products described herein are regulated products subject to the Wassenaar Arrangement or other agreements, they may not be exported without authorization from the appropriate governmental authority. Use of the information described herein for other purposes and/or reproduction or copying without the express permission of Seiko Instruments Inc. is strictly prohibited. The products described herein cannot be used as part of any device or equipment affecting the human body, such as exercise equipment, medical equipment, security systems, gas equipment, or any apparatus installed in airplanes and other vehicles, without prior written permission of Seiko Instruments Inc. Although Seiko Instruments Inc. exerts the greatest possible effort to ensure high quality and reliability, the failure or malfunction of semiconductor products may occur. The user of these products should therefore give thorough consideration to safety design, including redundancy, fire-prevention measures, and malfunction prevention, to prevent any accidents, fires, or community damage that may ensue.

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