S-4622A S-4622A CMOS thermal print head driver containing 64-bit
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64-bit THERMAL HEAD DRIVER
S-4622A
S-4622A CMOS thermal print head driver containing 64-bit shift register latch. used general purpose because selected latch driver enable. ideal bar-code printer thermal print head high-speed printing because large driver output current Features
current consumption typ. (fCLK=5 MHz, fixed) High speed operation (chip) (cascade connection) Driver output voltage max. Driver output current max. 64-bit shift register latch built Driver enable Selectable "H/L" latch driver enable
Block Diagram
DO63 DO64 VSS1
VSS0 LATCH CONT
VSS0
VSS0 HIST
D-FF
D-FF
D-FF
D-FF
D-FF
Figure
Seiko Instruments Inc.
64-bit THERMAL HEAD DRIVER S-4622A
Operation
Fundamental Operation 64-bit shift register reads data input rising edge CLOCK input. Please HIST OPEN. latch circuit operates depending levels CONT LATCH reads data shift register when their levels same, holds data shift register when they differ. latch data output respective drivers when high. driver output transistor turns when latch data high turns when low. Turning high makes driver output transistors off. Operation Generating Historical Data When HIST high, turns active. data input data input rising edge CLOCK input read shift resister historical data using logical circuit. This proceeded logical invert data input data from input data from example, when last printed-data input up-data printed-data input historical data figure below read shift resistor. Table Pattern last printed-data (OLD) up-data printed-data (SI) historical data shift resistor Pattern Pattern Pattern
HIGH.
LOW. application example advantage preliminary powering-on electricity data heating elements since when last printed-data up-data printer-data historical data will
Seiko Instruments Inc.
64-bit THERMAL HEAD DRIVER S-4622A
Terminal Functions (Refer dimensions arrangement)
Table
Name DO64 DOn) VSS1 VSS0 LATCH Functions Driver output terminals (Nch open-drain) driver Positive power supply logic logic Clock input terminal 64-bit shift register Serial data input terminal 64-bit shift register Serial data output terminal 64-bit shift register Data latch signal input terminal When CONT="L" open LATCH="L": Reads data shift register LATCH="H": Holds preceding data When CONT="H" LATCH="L": Holds preceding data LATCH="H": Reads data shift register Data latch signal control terminal Selects LATCH (pulldown resistor built Driver enable terminal Outputs latch data driver when (pull-up resistor built Driver enable terminal Outputs latch data driver when high (pull-down resistor built Former column serial data input terminal pull- down resistor built Former column serial data input control terminal pull-down resistor built HIST="H" terminal active. HIST="L" open Input from terminal allowed.
CONT HIST
Seiko Instruments Inc.
64-bit THERMAL HEAD DRIVER S-4622A
Absolute Maximum Ratings
Table
Parameter Supply voltage Driver output voltage Driver output current Input voltage Output voltage Max. junction temperature Operating temperature range Storage temperature range Symbol VSS0,1 VDOH IDOL VOUT TjMAX Topr Tstg Ratings -0.4 +7.0 VSS0-0.5 VDD+0.5 VSS0-0.5 VDD+0.5 +125 Unit
Electrical Characteristics
Table
(Unless otherwise specified: VDD=5.0 V±10%, Ta=-10 Parameter Supply voltage High level input voltage level input voltage High level input current Sybl VDD=5.0V VIH=5.0V Ta=25°C level input current VDD=5.0V VIL=0V Ta=25°C BEN,CONT,OLD, HIST Conditions Min. -0.5 4.45 Typ. Max. 0.05 -0.5 Unit
High level output voltage level output voltage High level output current level output current High level driver output voltage level driver output voltage Driver leakage current
VDOH VDOL
terminal, load terminal, load terminal, VOH=VDD-0.4 terminal, VOL=0.4 Heat generator resistance: min. IDOL=60 Ta=25 VDOH=7 1-bit driver output VDOH=7 64-bit driver output fCLK MHz,SI fixed fCLK MHz,SI fixed fCLK MHz, SI=1/2fCLK
ILEAK
Current consumption Static current
fCLK=fmax duty TSUD=THD=100 nsec OLD, HIST fmax LATCH TWLA=100 nsec Others level CLK, LATCH Other input terminals OPEN
Seiko Instruments Inc.
64-bit THERMAL HEAD DRIVER S-4622A
Electrical Characteristics
Table (Unless otherwise specified: VDD=5.0 V±10%, Ta=-10 Parameter pulse width Data setup time Data hold time Latch pulse width Latch setup time CLK-SO propagation delay time EN-DOn propagation delay time rise time fall time Clock frequency Symbol tWCLK tSUD tWLA tSULA tdSO tdDO trDO tfDO fCLK Conditions VIH=VDD, VIL=VSS0 VIH=VDD, VIL=VSS0 Min. Typ. Max. 13.0 Unit
CL=3 RL=1.0 VDOH=5 RL=1.0 VDOH=5 RL=1.0 VDOH=5 When cascade connection
1/fCLK HIST tSULA LATCH LATCH tdDO tfDO tdDO Figure trDO
tWCLK tSUD
tWLA
tdSO
Seiko Instruments Inc.
64-bit THERMAL HEAD DRIVER S-4622A
Dimensions
size (passivation opening)
(0,0)
0.71
pitch (driver output pad) Chip thickness 350±30 Before dicing
7.25
Figure
Coordinates (The origin coordinate axes center chip)
Table Name DO10 DO11 DO12 DO13 DO14 DO15 DO16 DO17 DO18 DO19 DO20 DO21 DO22 DO23 DO24 DO25 DO26 DO27 DO28 -3465 -3355 -3245 -3135 -3025 -2915 -2805 -2695 -2585 -2475 -2365 -2255 -2145 -2035 -1925 -1815 -1705 -1595 -1485 -1375 -1265 -1155 -1045 -935 -825 -715 -605 -495 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 Name DO29 DO30 DO31 DO32 DO33 DO34 DO35 DO36 DO37 DO38 DO39 DO40 DO41 DO42 DO43 DO44 DO45 DO46 DO47 DO48 DO49 DO50 DO51 DO52 DO53 DO54 DO55 DO56 -385 -275 -165 1045 1155 1265 1375 1485 1595 1705 1815 1925 2035 2145 2255 2365 2475 2585 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 Name DO57 DO58 DO59 DO60 DO61 DO62 DO63 DO64 VSS1 VSS0 LATCH VSS1 CONT VSS1 VSS1 VSS0 VSS1 VSS1 Unit: 2695 2805 2915 3025 3135 3245 3355 3465 3455 2855 2455 2085 1760 1570 -390 -860 -1280 -1520 -1760 -2103 -2523 -2929 -3455 257.5 257.5 257.5 257.5 257.5 257.5 257.5 257.5 -125.0 -257.5 -257.5 -257.5 -125.0 -257.5 -257.5 -125.0 -125.0 -257.5 -257.5 -257.5 -257.5 -125.0 -257.5 -257.5 -257.5 -125.0
Seiko Instruments Inc.
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