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6276 Dataheets PDF



Part Number 6276
Manufacturers Allegro MicroSystems
Logo Allegro MicroSystems
Description 16-BIT SERIAL-INPUT/ CONSTANTCURRENT LATCHED LED DRIVER
Datasheet 6276 Datasheet6276 Datasheet (PDF)

Data Sheet 26185.201B† 6276 16-BIT SERIAL-INPUT, CONSTANTCURRENT LATCHED LED DRIVER A6276ELW GROUND SERIAL DATA IN CLOCK LATCH ENABLE OUT 0 OUT 1 OUT 2 OUT 3 OUT 4 OUT 5 OUT 6 OUT 7 1 2 3 4 5 6 7 8 9 10 11 12 CK L REGISTER LATCHES 20 19 18 17 16 15 14 13 OE VDD IO REGULATOR 24 23 22 21 LOGIC SUPPLY REXT SERIAL DATA OUT OUTPUT ENABLE OUT 15 OUT 14 OUT 13 OUT 12 OUT 11 OUT 10 OUT 9 OUT 8 The A6276EA and A6276ELW are specifically designed for LEDdisplay applications. Each BiCMOS device includes a.

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Data Sheet 26185.201B† 6276 16-BIT SERIAL-INPUT, CONSTANTCURRENT LATCHED LED DRIVER A6276ELW GROUND SERIAL DATA IN CLOCK LATCH ENABLE OUT 0 OUT 1 OUT 2 OUT 3 OUT 4 OUT 5 OUT 6 OUT 7 1 2 3 4 5 6 7 8 9 10 11 12 CK L REGISTER LATCHES 20 19 18 17 16 15 14 13 OE VDD IO REGULATOR 24 23 22 21 LOGIC SUPPLY REXT SERIAL DATA OUT OUTPUT ENABLE OUT 15 OUT 14 OUT 13 OUT 12 OUT 11 OUT 10 OUT 9 OUT 8 The A6276EA and A6276ELW are specifically designed for LEDdisplay applications. Each BiCMOS device includes a 16-bit CMOS shift register, accompanying data latches, and 16 npn constant-current 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 8-bit devices are available as the A6275EA and A6275ELW. Two package styles are provided for through-hole DIP (suffix A) or surface-mount SOIC (suffix LW). Under normal applications, a copper lead frame and low logic-power dissipation allow the dual in-line package to sink maximum rated current through all outputs continuously over the operating temperature range (90 mA, 0.75 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-029-11 Note that the A6276EA (DIP) and the A6276ELW (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 ............... 1475 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 Functional Replacement for TB62706BN/BF Always order by complete part number, e.g., A6276EA . 6276 16-BIT SERIAL-INPUT, CONSTANT-CURRENT LATCHED LED DRIVER 2.5 ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS 24-PIN DIP, RθJA = 50°C/W 2.0 24-LEAD SOIC, RθJA = 75°C/W 1.5 1.0 0.5 0 25 50 75 100 125 AMBIENT TEMPERATURE IN ° C 150 Dwg. GP-022-3 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, 2003 Allegro MicroSystems, Inc. 6276 16-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 Enable Input Output Contents I1 I2 I3 ... IN-1 IN R1 R2 R3 ... X X X ... RN-1 RN PN-1 PN X X L H P1 P2 P3 ... PN-1 PN H H H ... H R = Previous State H P1 P2 P3 ... PN-1 PN X = Irrelevant P = Present State www.allegromicro.com 3 6276 16-BIT SERIAL-INPUT, CONSTANT-CURRENT LATCHED LED DRIVER ELECTRICAL CHARACTERISTICS at TA = +25°C, VDD = 5 V (unless otherwise noted). Limits Characteristic Supply Voltage Range Under-Voltage Lockout Output Current (any single output) Output Current Matching (difference between any two outputs at same VCE) Output Leakage Current Logic Input Voltage ICEX VIH VIL SERIAL DATA OUT Voltage Input Resistance VOL VOH RI IOL = 500 µA IOH = -500 µA ENABLE Input, Pull Up LATCH Input, Pull Down Supply Current IDD(OFF) REXT = open, VOE = 5 V REXT = 470 Ω, VOE = 5 V REXT = 250 Ω, VOE = 5 V IDD(ON) REXT = 470 Ω, VOE = 0 V REXT = 250 Ω, VOE = 0 V Symbol VDD VDD(UV) IO Test Conditions Operating VDD = 0 ¡ 5 V VCE = 0.7 V, REXT = 250 Ω VCE = 0.7 V, REXT = 470 Ω ∆IO 0.4.


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