Maker : Allegro MicroSystems
Part No. : A6275EA

  Datasheet PDF : A6275EA.pdf
  Cross Reference : A6275EA Cross Reference
  Buy Component : A6275EA Find Stock and Price

Shortcut : A6275EA  A6275ELW 

Product Information

Data Sheet 26185.200B† 6275 8-BIT SERIAL-INPUT, CONSTANTCURRENT LATCHED LED DRIVER A6275ELW GROUND SERIAL DATA IN CLOCK LATCH ENABLE OUT 0 OUT 1 OUT 2 OUT 3 1 2 3 4 5 6 7 8 CK L REGISTER LATCHES 12 11 10 9 OE VDD IO REGULATOR 16 15 14 13 LOGIC SUPPLY REXT SERIAL DATA OUT OUTPUT ENABLE OUT 7 OUT 6 OUT 5 OUT 4 The A6275EA and A6275ELW are specifically designed for LEDdisplay applications. Each BiCMOS device includes an 8-bit CMOS shift register, accompanying data latches, and eight npn constantcurrent sink drivers. Except for package style and allowable package power dissipation, the two devices are identical. The CMOS shift register and latches allow direct interfacing with microprocessor-based systems. With a 5 V logic supply, typical serial data-input rates are up to 20 MHz. The LED drive current is determined by the user’s selection of a single resistor. A CMOS serial data output permits cascade connections in applications requiring additional drive lines. For inter-digit blanking, all output drivers can be disabled with an ENABLE input high. Similar 150 mA output devices are available as the A6277EA and A6277ELW; similar 16-bit devices are available as the A6276EA and A6276ELW. Two package styles are provided for through-hole DIP (suffix A) or surface-mount SOIC (suffix LW). Under normal applications, copper lead frames and low logic-power dissipation allow these devices to sink maximum rated current through all outputs continuously over the operating temperature range (90 mA, 0.9 V drop, +85°C). Both devices are also available for operation over the standard temperature range of -20°C to +85°C. To order, change the suffix letter ‘E’ to ‘S’. Dwg. PP-029-10 Note that the A6275EA (DIP) and the A6275ELW (SOIC) are electrically identical and share a common terminal number assignment. ABSOLUTE MAXIMUM RATINGS Supply Voltage, VDD ...................... 7.0 V Output Voltage Range, VO ............................ -0.5 V to +17 V Output Current, IO ........................ 90 mA Ground Current, IGND ................. 750 mA Input Voltage Range, VI .................... -0.4 V to VDD + 0.4 V Package Power Dissipation, PD ..................................... See Graph Operating Temperature Range, TA ............................. -40°C to +85°C Storage Temperature Range, TS ........................... -55°C to +150°C Caution: These CMOS devices have input static protection (Class 2) but are still susceptible to damage if exposed to extremely high static electrical charges. FEATURES s s s s s To 90 mA Constant-Current Outputs Under-Voltage Lockout Low-Power CMOS Logic and Latches High Data Input Rate Pin-Compatible with TB62705CP Always order by complete part number, e.g., A6275EA . 6275 8-BIT SERIAL-INPUT, CONSTANT-CURRENT LATCHED LED DRIVER ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS 2.5 2.0 SUFFIX 'A', R θJA = 60°C/W 1.5 1.0 SUFFIX 'LW', R 0.5 θJA = 80°C/W 0 25 50 75 100 125 AMBIENT TEMPERATURE IN °C 150 Dwg. GP-018B FUNCTIONAL BLOCK DIAGRAM VDD CLOCK SERIAL DATA IN LATCH ENABLE UVLO LOGIC SUPPLY SERIAL DATA OUT SERIAL-PARALLEL SHIFT REGISTER LATCHES OUTPUT ENABLE (ACTIVE LOW) MOS BIPOLAR GROUND IO REGULATOR R EXT OUT 0 OUT 1 OUT 2 OUT N Dwg. FP-013-3 2 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 2000, 2001 Allegro MicroSystems, Inc. 6275 8-BIT SERIAL-INPUT, CONSTANT-CURRENT LATCHED LED DRIVER VDD VDD IN IN Dwg. EP-010-11 Dwg. EP-010-12 OUTPUT ENABLE (active low) LATCH ENABLE VDD VDD IN OUT Dwg. EP-063-6 Dwg. EP-010-13 CLOCK and SERIAL DATA IN TRUTH TABLE Serial Shift Register Contents Data Clock Input Input I1 I2 I3 ... IN-1 IN H L X H L R1 R2 ... R1 R2 ... RN-2 RN-1 RN-2 RN-1 RN-1 RN X X Serial Latch Data Enable Output Input RN-1 RN-1 RN X PN L H R1 R2 R3 ... P1 P2 P3 ... X L = Low Logic (Voltage) Level H = High Logic (Voltage) Level X X ... Latch Contents I1 I2 I3 ... SERIAL DATA OUT IN-1 IN Output Ena...

Link URL