A6832

Data Sheet 26185.110F A6832 DABiC-5 32-Bit Serial Input Latched Sink Drivers Intended originally to drive thermal printheads, the A6832 has been optimized for low output-saturation voltage, high-speed operation, and pin configurations that are the most convenient for the tight space requirements of high-resolution printheads. These integrated circuits can also be used to drive multiplexed LED displays or incandescent lamps at up to 125 mA peak current. The combination of bipolar and MOS technologies gives the A6832 arrays an interface flexibility beyond the reach of standard buffers and power driver circuits. The devices each have 32 bipolar npn open-collector saturated drivers, a CMOS data latch for each of the drivers, two 16-bit CMOS shift registers, and CMOS control circuitry. The high-speed CMOS shift registers and latches allow operation with most microprocessor-based systems. Use of these drivers with TTL may require input pull-up resistors to ensure an input logic high. MOS serial data outputs permit cascading for interface applications requiring additional drive lines. The A6832 is supplied in a 44-lead plastic leaded chip carrier (package suffix EP), for surface-mount applications requiring minimum area. These devices are lead (Pb) free, with 100% matte tin plated leadframes. A6832SEP/A6832EEP 44-pin PLCC 44 43 42 41 7 8 9 10 11 12 13 14 15 16 17 21 22 23 24 25 26 27 18 19 20 28 40 39 38 37 36 35 34 33 32 31 30 29 6 5 4 3 2 1 FEATURES 3.3 V to 5 V logic supply range To 10 MHz data input rate Schmitt trigger inputs for improved noise immunity Low-power CMOS logic and latches 40 V current sink outputs Low saturation voltage –40°C operation available ABSOLUTE MAXIMUM RATINGS Output Voltage, VOUT ......................................... 40 V Logic Supply Voltage, VDD................................... 7 V Input Voltage Range, VIN .............. –0.3 V to VDD +0.3 V Continuous Output Current, IOUT ................. 125 mA Package Power Dissipation, PD, see chart, page 5 Operating Temperature Range Ambient Temperature, TA ............ –20°C to +85°C Storage Temperature, TS .......... –55°C to +150°C Caution: CMOS devices have input-static protection, but are susceptible to damage when exposed to extremely high static-electrical charges. APPLICATIONS Thermal printheads Multiplexed LED displays Incandescent lamps Use the following complete part numbers when ordering: Part Number A6832SEP-T A6832EEP-T Pins 44 44 Package PLCC PLCC Operating Temperature –20ºC to +85ºC –40ºC to +85ºC Data Sheet 26185.110F A6832 DABiC-5 32-Bit Serial-Input Latched Sink Drivers Functional Block Diagram C LOC K S E R IAL DATA IN 32-B IT S HIF T R E G IS T E R V DD S E R IAL DATA OUT S T R OB E LAT C HE S OUT P UT E NAB LE MOS B IP OLAR OUT1 OUT 2 OUT3 G R OUND OUT 30 OUT31 OUT32 Typical Input Circuit Typical Output Driver VDD VDD OUT IN www.allegromicro.com 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 2 Data Sheet 26185.110F A6832 DABiC-5 32-Bit Serial-Input Latched Sink Drivers ELECTRICAL CHARACTERISTICS1 Unless otherwise noted: TA = 25°C, logic supply operating voltage Vdd = 3.0 V to 5.5 V Vdd = 3.3 V Characteristic Output Leakage Current Collector–Emitter Saturation Voltage Input Voltage Input Current Serial Data Output Voltage Maximum Clock Frequency2 Logic Supply Current Output Enable-to-Output Delay Strobe-to-Output Delay Output Fall Time Output Rise Time Clock-to-Serial Data Out Delay 1Positive Vdd = 5 V Max. 10 275 550 – 1.1 1.0 –1.0 – 0.3 – 6.0 100 1.0 1.0 1.0 1.0 1.0 1.0 – Min. – – – 3.3 – – – 4.5 – 10 – – – – – – – – – Typ. – – – – – < 0.01 < –0.01 4.75 0.15 – – – – – – – – – 50 Max. 10 275 550 – 1.7 1.0 –1.0 – 0.3 – 6.0 100 1.0 1.0 1.0 1.0 1.0 1.0 – Units μA mV mV V V μA μA V V MHz mA μA μs μs μs μs μs μs ns Symbol ICEX VCE(SAT) VIN(1) VIN(0) IIN(1) IIN(0) VOUT(1) VOUT(0) fc IDD(1) IDD(0) tdis(BQ) ten(BQ) tp(STH-QL) tp(STH-QH) tf tr tp(CH-SQX) Test Conditions VOUT = 40 V IOUT = 50 mA IOUT = 100 mA Min. – – – 2.2 – Typ. – – – – – < 0.01 < –0.01 3.05 0.15 – – – – – – – – – 50 VIN = VDD VIN = 0 V IOUT = –200 μA IOUT = 200 μA – – 2.8 – 10 One output on, IOUT = 100 mA All outputs off VCC = 50 V, R1 = 500 Ω, C1 ≤ 30 pF VCC = 50 V, R1 = 500 Ω, C1 ≤ 30 pF VCC = 50 V, R1 = 500 Ω, C1 ≤ 30 pF VCC = 50 V, R1 = 500 Ω, C1 ≤ 30 pF VCC = 50 V, R1 = 500 Ω, C1 ≤ 30 pF VCC = 50 V, R1 = 500 Ω, C1 ≤ 30 pF IOUT = ±200 μA – – – – – – – – – 2Operation (negative) current is defined as conventional current going into (coming out of) the specified device pin. at a clock frequency greater than the specified minimum value is possible but not warranteed. 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 ... X X ... RN-2 RN-1 RN-2 RN-1 RN-1 RN X X PN-1 PN Serial Data Strobe Output Input RN-1 RN-1 RN X PN L H R1 R2 R3 ... P1 P2 P3 ... X L = Low Logic Level H = High Logic Level X = Irrelevant P = Present State R = Previous State Latch Contents I1 I2 I3 ... IN-1 IN Output Enable Input Output Contents I1 I2 I3 ... IN-1 I N R1 R2 R3 ... X P1 P2 P3 ... RN-1 RN PN-1 PN X X H L P1 P2 P3 ... PN-1 PN H H H ... H H X X ... www.allegromicro.com 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 3 Data Sheet 26185.110F A6832 DABiC-5 32-Bit Serial-Input Latched Sink Drivers Timing Requirements and Specifications (Logic Levels are VDD and Ground) C C LOC K A S E R IAL DAT A IN DAT A 50% B 50% t p(C H-S QX) S E R IAL DAT A OUT D S T R OB E 50% 50% DAT A E OUT P UT E NAB LE HIG H = ALL OUT P UT S E NAB LE D t p(S TH-QH) t p(S T H-QL) 90% OUT N DAT A 10% LOW = ALL OUT P UT S B LANK E D (DIS AB LE D) OUT P UT E NAB LE 50% t en(B Q) tr t dis (B Q) OUT N 10% tf 90% 50% DAT A Key A B C D E Description Data Active Time Before Clock Pulse (Data Set-Up Time) Data Active Time After Clock Pulse (Data Hold Time) Clock Pulse Width Time Between Clock Activation and Strobe Strobe Pulse Width Symbol tsu(D) th(D) tw(CH) tsu(C) tw(STH) Time (ns) 25 25 50 100 50 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 logical 0 to logical 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 OUTPUT ENABLE input be low during serial data entry. When the OUTPUT ENABLE input is low, the output sink drivers are disabled (OFF). The information stored in the latches is not affected by the OUTPUT ENABLE input. With the OUTPUT ENABLE input high, the outputs are controlled by the state of their respective latches. www.allegromicro.com 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 4 Data Sheet 26185.110F A6832 DABiC-5 32-Bit Serial-Input Latched Sink Drivers Allowable Power Dissipation, PD* 4.5 4.0 PACKAGE POWER DISSIPATION (W) 3.5 3.0 A6832EP, RθJA = 30 °C/W 2.5 2.0 1.5 1.0 A6832EP, RθJA = 54 °C/W 0.5 0 25 50 75 100 125 AMBIENT TEMPERATURE (º C) 150 *Additional thermal information is available on the Allegro Web site. A6832SEP/A6832EEP SERIAL DATA OUT 32 GROUND STROBE OUTPUT ENABLE LOGIC SUPPLY SERIAL DATA IN CLOCK OUT32 41 OUT1 NC 44 43 VDD 1 42 40 5 6 4 3 2 NC OUT 2 7 8 39 OUT31 38 37 SHIFT REGISTER 9 10 SHIFT REGISTER 36 LATCHES LATCHES 11 12 13 14 15 16 35 34 33 32 31 30 29 OUT21 OUT12 17 OUT 17 24 OUT 13 19 20 21 22 23 OUT 20 27 25 26 NC 18 OUT 16 NC NC 28 www.allegromicro.com 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 5 Data Sheet 26185.110F A6832 DABiC-5 32-Bit Serial-Input Latched Sink Drivers A6832SEP and A6832EEP Dimensions in Inches (controlling dimensions) 28 18 29 0.319 0.291 0.021 0.013 0.695 0.685 0.656 0.650 0.319 0.291 0.050 BSC INDEX AREA 17 0.032 0.026 39 7 40 0.020 MIN 44 1 2 6 0.656 0.650 0.695 0.685 Dwg. MA-005-44A in 0.180 0.165 Dimensions in Millimeters (for reference only) 28 18 29 8.10 7.39 0.533 0.331 17.65 17.40 16.662 16.510 INDEX AREA 17 0.812 0.661 8.10 7.39 1.27 BSC 39 7 40 0.51 MIN 44 1 2 6 4.57 4.20 16.662 16.510 17.65 17.40 Dwg. MA-005-44A mm NOTES: 1. Exact body and lead configuration at vendor’s option within limits shown. 2. Lead spacing tolerance is non-cumulative. www.allegromicro.com 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 6 Data Sheet 26185.110F A6832 DABiC-5 32-Bit Serial-Input Latched Sink Drivers 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 products are not authorized for use as critical components in life-support devices or systems without express written approval. 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. Copyright©2003, 2004, 2005, 2006 AllegroMicrosystems, Inc. www.allegromicro.com 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 7