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| Standard ICs 8-bit, serial IN, parallel OUT driver BA829 The BA829 is an 8-bit, serial input, parallel output driver. This is a monolithic IC developed for use in thermal print heads, LED character displays, and other similar applications. *Applicationshead drivers Thermal print LED character displays *Features up to 300mA. 1) Can drive 2) Controlling the strobe terminal with the drive timing pulse enables current to be reduced when drive is not being carried out. 3) Using the data output terminal for the next data input enables secondary connections. 4) The digital ground and power ground are separated. 5) A latch is included between the shift register and driver output. 6) A stand-by function is built in. (10A typ. at stand-by) *Pin assignments CLK PSW DOUT VCC PGND 08 07 06 05 1 2 3 4 5 6 7 8 9 18 LATCH 17 STB 16 DATA 15 LGND 14 PGND 13 01 12 02 11 03 10 04 1 Standard ICs BA829 *Block diagram 01 13 02 12 03 11 04 10 05 9 06 8 07 7 08 6 PGND 14 5 POWER GND STB 17 LATCH 4 VCC LATCH 18 LOGIC GND 15 SHIFT REG. CLK 1 3 DATA 16 DOUT 2 POWER ON PSW *Absolute maximum ratings (Ta = 25C) Parameter Applied voltage Power dissipation Operating temperature Storage temperature Input voltage Output voltage Symbol VCC Pd Topr Tstg VIN VOUT Limits 7.0 1100 - 25 ~ + 70 - 55 ~ + 125 - 0.3 ~ VCC 15 Unit V mW C C V V 2 Standard ICs BA829 *Recommended operating conditions (Topr = - 25 to + 70C) Parameter Power supply voltage Clock frequency Power setup time Clock pulse width Data setup time Data hold time Latch pulse timing time 1 Latch pulse timing time 2 Latch pulse width Strobe pulse timing time 1 Strobe pulse timing time 2 Strobe pulse width Voltage between GNDs Symbol VCC tCLK tPset tWC tDset tDhold tLT1 tLT2 tWL tST1 tST2 tWS VG Min. 4.5 -- 500 1 300 400 600 250 800 300 300 3 -- Typ. 5.0 -- -- -- -- -- -- -- -- -- -- -- -- Max. 5.5 500 -- -- -- -- -- -- -- -- -- -- 0.2 Unit V kHz ns s ns ns ns ns ns ns ns s V Fig.4 Fig.4 Fig.4 Fig.4 Fig.4 Fig.4 Fig.4 Fig.4 Fig.4 Fig.4 -- Conditions -- -- This is the phase differential between the L-GND and the P-GND. Shorting should be kept as close to the power supply as possible, but the range should be such that the phase differential between the L-GND pin and the P-GND pin does not exceed 0.2V. * Electrical characteristics (unless otherwise noted, Ta = 25C, VCC = 5.0 V) Parameter Supply current (1) Supply current (2) Supply current (3) Output pin ON voltage Output pin leakage current Data transfer speed Input high level voltage Input low level voltage Input high level current Input low level current "H" level data output voltage "L" level data output voltage Data output delay time Data output delay time Printing output delay time Printing output delay time Input high level current Input low level current Symbol ICC1 ICC2 ICC3 VOON IOOFF fCLK VIH VIL IIH1 IIL1 VDOH VDOL tDLH tDHL tOLH tOHL IIH2 IIL2 Min. -- -- -- -- -- 500 2.6 -- -- -- 2.8 -- -- -- -- -- -- -- Typ. 10 110 14 0.4 10 -- -- -- 0.1 - 0.01 3.0 0.3 0.6 0.6 -- -- 0.04 0.1 Max. 20 158 20 0.6 50 -- -- 0.8 10 - 0.1 -- 0.4 1.0 2.0 10 10 0.1 10 Unit A mA mA V A kHz V V A mA V V s s s s mA A PSW "L" PSW "H", STB "H" PSW "H", STB "L" IOON = 300mA VO = 13.5V -- -- -- VI = 3.4V, CLK, LATCH, DATA, STB pin VI = 0.4V, CLK, LATCH, DATA, STB pin IDOH = - 400A IDOL = 1.6mA RLD = 10k RLD = 10k RL = 560, VO = 13.5V RL = 560, VO = 13.5V VI = 3.4V, PSW pin VI = 0.4V, PSW pin Conditions Measurement circuit Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Fig.2 Fig.2 Fig.1 Fig.1 Fig.1 Fig.1 -- -- -- -- Fig.1 Fig.1 3 Standard ICs BA829 *Measurement circuits VDOFF V VO A VDCH VDCL V RLD A IL VOON V RL x 8 08 D0 DATA LATCH PGND PGND LGND PSW CLK STB VCC A ICC1 ~ 3 VCC VCC VCC Pulse Gen. Fig.1 LATCH A IIH, IIL VI Fig.2 4 LGND CLK DATA STB PSW 01 Standard ICs BA829 *Input / output circuits VCC VCC VCC IIL IIL (a) INPUT (CLK , DATA , LATCH , STB ) (b) INPUT (PSW) (c) OUTPUT (DOUT) Fig.3 *Timing chart PSW tWC tPset tWC 1 CLK tDset tDhold 2 8 9 10 DATA tDLH tDHL DOUT tLT1 tLT2 LATCH tWL tST1 STB tWL tWS tDHL tDLH O8 Fig.4 5 Standard ICs BA829 *Application example VO 10 10 9 11 11 8 12 12 7 13 13 6 14 14 5 15 15 4 16 DIN 16 3 17 17 2 18 18 1 VCC P - GND L - GND PSW CLK LAT STB Fig.5 6 1 2 3 4 5 6 7 8 9 Standard ICs BA829 *Electrical characteristic curves 400 POWER DISSIPATION : Pd (mW) OUTPUT CURRENT : IO (mA) 300 2000 400 Ta = 50C Ta = 70C Ta = 25C 1500 OUTPUT CURRENT : IO (mA) 300 46% 55% 90% 200 1100 1000 200 180mA 100 500 100 13.5 0 6 12 18 24 0 25 75 125 AMBIENT TEMPERATURE : Ta (C) 0 20 40 60 61% 80 85% 100 OUTPUT SUPPLIED VOLTAGE : VO (V) STB DUTY (%) Fig.6 Output supplied voltage vs. output current and range of usdoility This product should be used within the range indicated by the shaded section above, even if the load includes reactance. Fig.7 Ambient temperature vs. power dissipation Fig.8 Output duty maximum output current (when all bits are on, duty cycle is 1Hz or higher) *Circuit operation internal configuration shown in the The BA829 has the logic diagram, with the following five input pins: clock (CLK), data (DATA), latch (LATCH), strobe (STB), and power switch (PSW). Data input is synchronized to the clock, with data being read serially at the rising edge and latched at the rising edge of the shift register after it has shifted. The latched data appears at output terminals O1 to O8, depending on the strobe input, with that pulse width being the same as that of the strobe input. The data output pin DOUT is used when ICs are connected in cascade format, and when the output for the last stage of the shift register appears, is connected to the next data input pin DATA. When these clock and strobe latches and power switch are used in common, the output pins can be increased by eight bits each. In stand-by mode, the power switch is set to "L". *External dimensions (Units: mm) 22.9 0.3 18 10 6.5 0.3 1 0.51Min. 9 7.62 3.29 0.2 3.95 0.3 0.3 0.1 2.54 0.5 0.1 0 ~ 15 DIP18 7 |
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