DS8656

DS8654 NSC | Alldatasheet

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NATL SENICOND {MEMORY} 42 DEM bSOLL2b 0043255 § rr og A National °* >. ‘Display Controllers/Drivers- - a Semiconductor... T-51-15 DS8654 8-Output Display Driver (LED, VF, Thermal Printer) _ | DS8656 Diode Matrix . Le . : : oo g General Description DS8654 is an 8-digit driver with emitter/follower out- uses. In this application the same segment in each digit puts. It can source up to 50 mA at a low impedance, and js selected at the same time, reducing the overall time ‘operates with a constant internal drive current over & for a complete print cycle, The DS8654 is an B-digit 7 wide range of power supply—from 4.5V to 33V. The driver, With a 15-digit print head, two of the DS8654 (DS8654 can be used to drive electrical or mechanical, ‘are required. multiplexed or unmultiplexed display systems. It can be used as a segment driver for common cathode displays ‘The DS8G56 diode arrays are used to prevent “sneak” with external current limiting resistors or can drive currents in the resistive print head. In a 15-digit print incandescent or fluorescent displays directly, both digits head with ‘one alphanumeric digit there are 119 resistor (anodes) and segments (grids). It will be necessary to run segments requiring 119 diodes, For ease of assembly, the ‘the device at a lower duty cycle, to keep the maximum DS8656 is configured in four groups of three common package de power dissipation less than 600 mW while cathode diodes in each group. In the system, ten parts operating all 8 outputs at high supply voltage and large of DS8656 are required. source current. The inputs are MOS compatible and eliminate the need for level shifting since inputs are The whole system is designed to operate from a +19V. referenced to the most negative supply of system. supply for the print head and an B-cell nickel-cadmium 4d battery supplying -8V to —11.6V for the rest of the 2 System Description electronics. The Ssegment drive transistors require 5 Py The DS8654 and DS8656 are specifically designed to LV cen’s of 33V min, B of > 100 at Ig = 500 mA, and ‘operate a thermal printing head for calculator or other Vgat < 1.0V at 800 mA with 15 mA drive. ews): ss sv Aa oe SS Connection Diagrams : Duahin-ine Package DuabieLine Package OUTS OUTG OUT? GUTe GND INS IN7 ING INS . = our4 OUT OUT2 OUT Vcc 1 NZ IND Ina Tor view i Order Number DS8654N Order Numbor DSBG5EN See NS Package NIBA Seu NS Pockape NTA ps 5-413 Ene PSE RES RENT EA OES, AAS gi ROE: AAR ROR RE

NATL SEMICOND {MEMORY} 42 DEM 6501126 O43eSb 7 ii

6501126 NATL SEMICOND, (MEMORY) - _420_ 43256 0

8 Absolute Maximum Ratings psess¢ (Note 1) Operating Conditions pvssesa

: MIN MAX UNITS o ‘Supply Voltage 36V ‘Supply Voltege (Voc) 45.33 v =| storage Temperature Range O50 10 H180°C : oe Maximum Power Dissipation at 26°C * - soe - T-52-13-05 Molded Package (0S8654)" . 1563 mW © . Molded Package (DS8656)t 1280 mW . oo Lead Temperature (Soldering, 10 seconds) * 300°C a “Derate molded package 12.8 mW/*C above 25°C, *Derate moided package 10.24 mW/*C above 25°C, Electrical Characteristics vseesa (Notes 2 and 3) Von “On” State Output Voltage Veo = Max, tiny = 500K, Veen1.8 | Voe-2.6 v lon *~50mA lecion) Supply Current Voc = Max, Vin = 6.5V, mA (All Outputs "ON") tour = OmA Note 1 “Absolute Maximum Ratings" are those values beyond which the safety of the device cannal be guaranteed, They are not meant fo imply - that the devices should be operated at these limits, The table of “Electrical Characteristics” provides conditions for actual device operation, Note 2: Unless otherwise specified min/max limits apply across the O°C to +70°C range for the OSB654. All typicals are given for Veg « 30V and Ta = 25°C. Note 3: All currents into device pins shown as positive, out of device pins as negative, all voltages referenced to ground unless otherwise noted. All values shown at max or min on absolute value basis Electrical Characteristics ossess (tT, = 0°c to +70°C) # Schematic Diagram Fe ose664 k is 2 . i Tes . = . a © our z 5-114

NATL SENICOND {MEMORY} 42 DEP LS0L126 oovz257 9 ; f Typical Applications : J-51-15 | :, 7 * ~ ‘Thermal Printer co = o Ss . ' 3 an | i Ea LED Diplay-0 mA to 50 mA Peak Segmant Current i # | | SET1ETT : 7 : F TO z LT TT I ft I | Tt S115 : i

NATL SENICOND <nEMORY? 42 DEP ESo1ue2b oougasa of p — 8

3 Typical Applications (continued) T6115

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• NATL SEMICOND {MEMORY} 4ec D | 6501126 GO44e34 2 T A Physical Dimensions A T-90-20 PACKAGES Duat-In-Line Packages (N) Devices ordered with “N" suffix are supplied in plastic molded dual-in-line packages. Molding material is a highly reliable compound suitable for military as well as commercial temperature range applications. Lead. material iscopperor alloy 42 with a hot solder dipped surface to allow ease of solderability. @) Devices ordered with the “J” suffix are supplied in a CERDIP package (ceramic lid and base sealed with high temperature vitreous glass). Lead material is solder dipped alloy 42. (D) Devices ordered with the“D". ‘suffix are supplied in side brazed, multi-layer, ceramic dual-in-line packages. The! leads are Kovar or alloy 42 and either tin-plated, gold-plated, or solder-plated. (Q) Devices ordered with the “Q” suffix are supplied in either a “D" or “J” package, but with a UV window. Metal Can Packages (H) Devices ordered with the “H” suffix are supplied in a metal can package. The cap is nickel finish and the leads are gold- plated Kovar. Gold free ‘construction using epoxy D/A Is also available, with a tin-plated finish. Flat Packages (F) Devices ordered with the “F” suffix are supplied in a multi-layer, ceramic bottom: brazed flat package. The lid is plated alloy 42, and leads are gold-plated, tin-plated, or solder-plated alloy 42 or Kovar. () Devices ordered with the “W" suffix are supplied in a low-temperature ceramic flat package.