A6810 10-Bit Serial Input Latched Source Driver Discontinued Product This device is no longer in production. The device should not be purchased for new design applications. Samples are no longer available. Date of status change: November 1, 2010 Recommended Substitutions: For existing customer transition, and for new customers or new applications, contact Allegro Sales. NOTE: For detailed information on purchasing options, contact your local Allegro field applications engineer or sales representative. Allegro MicroSystems, Inc. reserves the right to make, from time to time, revisions to the anticipated product life cycle plan for a product to accommodate changes in production capabilities, alternative product availabilities, or market demand. The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use. A6810 10-Bit Serial Input Latched Source Driver Features and Benefits Description ▪ Controlled output slew rate ▪ High-speed data storage ▪ 60 V minimum output breakdown ▪ High data-input rate ▪ PNP active pull-downs ▪ Low output-saturation voltages ▪ Low-power CMOS logic and latches ▪ Improved replacements for TL4810x, UCN5810x, and UCQ5810x The A6810 combines 10-bit CMOS shift registers, accompanying data latches, and control circuitry with bipolar sourcing outputs and PNP active pull-downs. Designed primarily to drive vacuum-fluorescent (VF) displays, the 60 V and –40 mA output ratings also allow this device to be used in many other peripheral power driver applications. The A6810 features an increased data input rate (compared with the older UCN/UCQ5810-F) and a controlled output slew rate. Packages: The CMOS shift register and latches allow direct interfacing with microprocessor-based systems. With a 3.3 or 5 V logic supply, serial data-input rates of at least 10 MHz can be attained A CMOS serial data output permits cascaded connections in applications requiring additional drive lines. Similar devices are available as the A6812 (20-bit) and A6818 (32-bit). 18-pin DIP (A package) Not to scale 20-pin SOICW (LW package) The A6810 output source drivers are NPN Darlingtons, capable of sourcing up to 40 mA. The controlled output slew rate reduces electromagnetic noise, which is an important consideration in systems that include telecommunications and microprocessors, and to meet government emissions regulations. For inter-digit Continued on the next page… Functional Block Diagram 26182.124I 10-Bit Serial Input Latched Source Driver A6810 Description (continued) blanking, all output drivers can be disabled and all sink drivers turned on with a BLANKING input high. The PNP active pulldowns can sink at least 2.5 mA. The A6810 is available in three temperature ranges for optimum performance in commercial (S), industrial (E), and automotive (K) applications. It is provided in two package styles, through-hole DIP (package A) and surface-mount SOIC (package LW). Copper leadframes, low logic-power dissipation, and low output-saturation voltages allow all devices to source 25 mA from all outputs continuously over the full operating temperature range. The lead (Pb) free versions have 100% matte tin leadframe plating. Selection Guide Pb-free Packing Ambient Temperature, TA (°C) A6810EA-T Part Number Yes 21 pieces/tube –40 to 85 A6810SA-T Yes 21 pieces/tube –20 to 85 A6810ELWTR-T Yes 1000 pieces/13-in. reel –40 to 85 A6810KLWTR-T Yes 1000 pieces/13-in. reel –40 to 125 Package 18-pin DIP 20-pin SOIC-W A6810SLWTR-T Yes 1000 pieces/13-in. reel –20 to 85 *Variant is in production but has been determined to be LAST TIME BUY. This classification indicates that the variant is obsolete and notice has been given. Sale of the variant is currently restricted to existing customer applications. The variant should not be purchased for new design applications because of obsolescence in the near future. Samples are no longer available. Status date change May 3, 2010. Deadline for receipt of LAST TIME BUY orders is October 29, 2010. Absolute Maximum Ratings* Characteristic Symbol Notes Rating Units Logic Supply Voltage VDD 7.0 V Driver Supply Voltage VBB 60 V Input Voltage Range VIN –0.3 to VDD + 0.3 V Continuous Output Current Range IOUT –40 to 15 mA Operating Ambient Temperature Maximum Junction Temperature Storage Temperature Range E –40 to 85 ºC Range K –40 to 125 ºC Range S –20 to 85 ºC TJ(max) 150 ºC Tstg –55 to 125 ºC TA *Caution: These CMOS devices have input static protection (Class 2) but are still susceptible to damage if exposed to extremely high static electrical charges. Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com 2 A6810 10-Bit Serial Input Latched Source Driver Pin-out Diagrams Thermal Characteristics Characteristic Package Thermal Resistance Symbol RθJA Test Conditions* Value Units Package A, 1-layer PCB with copper limited to solder pads 65 ºC/W Package LW, 1-layer PCB with copper limited to solder pads 90 ºC/W *Additional thermal information available on the Allegro website. Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com 3 A6810 10-Bit Serial Input Latched Source Driver ELECTRICAL CHARACTERISTICS at TA = +25°C (A6810S-) or over operating temperature range (A6810E-), VBB = 60 V, logic supply operating voltage VDD = 3.0 to 5.5 V; unless otherwise noted Characteristic Output Leakage Current Output Voltage Symbol ICEX Test Conditions VOUT = 0 V Limits @ VDD = 3.3 V Limits @ VDD = 5 V Mln. Typ. Max. Min. Typ. Max. Units — <-0.1 -15 — <-0.1 -15 μA 57.5 58.3 — 57.5 58.3 — V VOUT(1) IOUT = -25 mA VOUT(0) IOUT = 1 mA — 1.0 1.5 — 1.0 1.5 V Output Pull-Down Current IOUT(0) VOUT = 5 V to VBB 2.5 5.0 — 2.5 5.0 — mA Input Voltage VIN(1) 2.2 — — 3.3 — — V VIN(0) — — 1.1 — — 1.7 V Input Current Input Clamp Voltage Serial Data Output Voltage Maximum Clock Frequency Logic Supply Current IIN(1) VIN = VDD — <0.01 1.0 — <0.01 1.0 μA IIN(0) VIN = 0 V — <-0.01 -1.0 — <-0.01 -1.0 μA IIN = -200 μA — -0.8 -1.5 — -0.8 -1.5 V VOUT(1) IOUT = -200 μA 2.8 3.05 — 4.5 4.75 — V VOUT(0) IOUT = 200 μA — 0.15 0.3 — 0.15 0.3 V 10* — — 10* — — MHz VIK fc IDD(1) All Outputs High — 0.25 0.75 — 0.3 1.0 mA IDD(0) All Outputs Low — 0.25 0.75 — 0.3 1.0 mA IBB(1) All Outputs High, No Load — 1.5 3.0 — 1.5 3.0 mA IBB(0) All Outputs Low — 0.2 20 — 0.2 20 μA tdis(BQ) CL = 30 pF, 50% to 50% — 0.7 2.0 — 0.7 2.0 μs ten(BQ) CL = 30 pF, 50% to 50% — 1.8 3.0 — 1.8 3.0 μs tp(STH-QL) RL = 2.3 kΩ, CL ≤ 30 pF — 0.7 2.0 — 0.7 2.0 μs tp(STH-QH) RL = 2.3 kΩ, CL ≤ 30 pF — 1.8 3.0 — 1.8 3.0 μs Output Fall Time tf RL = 2.3 kΩ, CL ≤ 30 pF 2.4 — 12 2.4 — 12 μs Output Rise Time tr RL = 2.3 kΩ, CL ≤ 30 pF 2.4 — 12 2.4 — 12 μs Output Slew Rate dV/dt RL = 2.3 kΩ, CL ≤ 30 pF 4.0 — 20 4.0 — 20 V/μs IOUT = ±200 μA — 50 — — 50 — ns Load Supply Current Blanking-to-Output Delay Strobe-to-Output Delay Clock-to-Serial Data Out Delay tp(CH-SQX) Negative current is defined as coming out of (sourcing) the specified device terminal. Typical data is is for design information only and is at TA = +25°C. *Operation at a clock frequency greater than the specified minimum value is possible but not warranteed. Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com 4 A6810 10-Bit Serial Input Latched Source Driver TIMING REQUIREMENTS and SPECIFICATIONS (Logic Levels are VDD and Ground) C 50% CLOCK A SERIAL DATA IN B DATA 50% t p(CH-SQX) SERIAL DATA OUT DATA 50% D 50% STROBE BLANKING E LOW = ALL OUTPUTS ENABLED tp(STH-QH) tp(STH-QL) 90% DATA OUT N 10% Dwg. WP-029 HIGH = ALL OUTPUTS BLANKED (DISABLED) BLANKING 50% t dis(BQ) tr t en(BQ) OUT N tf 90% 10% DATA 50% Dwg. WP-030A A. Data Active Time Before Clock Pulse (Data Set-Up Time), tsu(D) ........................................... 25 ns B. Data Active Time After Clock Pulse (Data Hold Time), th(D) ................................................ 25 ns C. Clock Pulse Width, tw(CH) ................................................. 50 ns D. Time Between Clock Activation and Strobe, tsu(C) ......... 100 ns E. Strobe Pulse Width, tw(STH) .............................................. 50 ns NOTE – Timing is representative of a 10 MHz clock. Higher speeds may be attainable; operation at high temperatures will reduce the specified maximum clock frequency. Serial Data present at the input is transferred to the shift register on the logic “0” to logic “1” transition of the CLOCK input pulse. On succeeding CLOCK pulses, the registers shift data information towards the SERIAL DATA OUTPUT. The SERIAL DATA must appear at the input prior to the rising edge of the CLOCK input waveform. Information present at any register is transferred to the respective latch when the STROBE is high (serial-to-parallel conversion). The latches will continue to accept new data as long as the STROBE is held high. Applications where the latches are bypassed (STROBE tied high) will require that the BLANKING input be high during serial data entry. When the BLANKING input is high, the output source drivers are disabled (OFF); the PNP active pull-down sink drivers are ON. The information stored in the latches is not affected by the BLANKING input. With the BLANKING input low, the outputs are controlled by the state of their respective latches. Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com 5 10-Bit Serial Input Latched Source Driver A6810 TRUTH TABLE Serial Shift Register Contents Data Clock Input Input I1 I2 I3 ... IN-1 IN Serial Data Strobe Output Input Latch Contents I1 I2 I3 ... IN-1 Output Contents IN Blanklng I1 I2 I3 ... IN-1 IN H H R1 R2 ... RN-2 RN-1 RN-1 L L R1 R2 ... RN-2 RN-1 RN-1 X R1 R2 R3 ... RN-1 RN RN X X X L R1 R2 R3 ... RN-1 RN PN H P1 P2 P3 ... PN-1 PN L P1 P2 P3 ... PN-1 PN X X H L X X ... P1 P2 P3 ... X PN-1 PN X X ... X L L ... L L L = Low Logic Level H = High Logic Level X = Irrelevant P = Present State R = Previous State Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com 6 10-Bit Serial Input Latched Source Driver A6810 Package A 18-Pin DIP 22.86 ±0.51 18 +0.10 0.25 –0.05 +0.76 6.35 –0.25 +0.38 10.92 –0.25 7.62 A 1 2 5.33 MAX +0.51 3.30 –0.38 2.54 +0.25 1.52 –0.38 0.46 ±0.12 SEATING PLANE C All dimensions nominal, not for tooling use (reference JEDEC MS-001 AC) Dimensions in inches Dimensions exclusive of mold flash, gate burrs, and dambar protrusions Exact case and lead configuration at supplier discretion within limits shown A Terminal #1 mark area Package LW 20-Pin SOICW 12.80±0.20 4° ±4 20 20 +0.07 0.27 –0.06 7.50±0.10 10.30±0.33 A 1 2.25 9.50 +0.44 0.84 –0.43 2 1 2 0.65 0.25 20X SEATING PLANE 0.10 C 0.41 ±0.10 1.27 C SEATING PLANE GAUGE PLANE 1.27 B PCB Layout Reference View 2.65 MAX 0.20 ±0.10 For Reference Only Dimensions in millimeters (Reference JEDEC MS-013 AC) Dimensions exclusive of mold flash, gate burrs, and dambar protrusions Exact case and lead configuration at supplier discretion within limits shown A Terminal #1 mark area B Reference pad layout (reference IPC SOIC127P1030X265-20M) All pads a minimum of 0.20 mm from all adjacent pads; adjust as necessary to meet application process requirements and PCB layout tolerances Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com 7 A6810 10-Bit Serial Input Latched Source Driver Copyright ©1998-2010, Allegro MicroSystems, Inc. The products described here are manufactured under one or more U.S. patents or U.S. patents pending. Allegro MicroSystems, Inc. reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the performance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that the information being relied upon is current. Allegro’s products are not to be used in life support devices or systems, if a failure of an Allegro product can reasonably be expected to cause the failure of that life support device or system, or to affect the safety or effectiveness of that device or system. The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor for any infringement of patents or other rights of third parties which may result from its use. For the latest version of this document, visit our website: www.allegromicro.com Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com 8