BiMOS 8-BIT LATCHED SOURCE DRIVERS Designed primarily with high-v
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BiMOS 8-BIT LATCHED SOURCE DRIVERS
BiMOS 8-BIT LATCHED SOURCE DRIVERS
Designed primarily with high-voltage vacuum-fluorescent displays, UCN5815A UCN5815EP BiMOS integrated circuits consist eight Darlington source drivers with output pull-down resistors, CMOS latch each driver, common STROBE, BLANKING, ENABLE functions. BiMOS devices have considerably better data-input rates than original BiMOS circuits. With logic supply, they will typically operate above MHz. With supply, significantly higher speeds obtained. CMOS inputs cause minimum loading compatible with standard CMOS NMOS logic commonly found microprocessor designs. circuits require appropriate pull-up resistors. bipolar outputs used segment, (matrix), bar, digit drivers vacuum-fluorescent displays. eight outputs activated simultaneously ambient temperatures excess 75°C. simplify printed wiring board layout, output connections opposite inputs. minimum component display subsystem, requiring discrete components, assembled using UCN5815A/EP with UCN5810AF/EPF/LWF, UCN5812AF/EPF, UCN5818AF/EPF serial-to-parallel latched drivers. Suffix devices furnished standard 22-pin plastic DIP; suffix `EP' indicates 28-lead PLCC.
Data Sheet 26183.10A
UCN5815A
Dwg. A-10,987
ABSOLUTE MAXIMUM RATINGS +25°C Free-Air Temperature
Output Voltage, VOUT Logic Supply Voltage Range, Load Supply Voltage Range, Input Voltage Range, -0.3 Continuous Output Current, IOUT Package Power Dissipation, (UCN5815A) (UCN5815EP) 2.27 Operating Temperature Range, -20°C +85°C Storage Temperature Range, -55°C +150°C
Derate linearly +150°C. Caution: CMOS devices have input static protection susceptible damage when exposed extremely high static electrical charges.
FEATURES
Minimum Date-lnput Rate High-Voltage Source Outputs CMOS, NMOS, Compatible Inputs Low-Power CMOS Latches Internal Pull-Down Resistors Wide Supply-Voltage Range
Always order complete part number: Part Number UCN5815A UCN5815EP Package 22-Pin 28-Lead PLCC
BiMOS 8-BIT LATCHED SOURCE DRIVERS
ELECTRICAL CHARACTERISTICS +25°C, (unless otherwise noted).
Characteristic Output Voltage Output Voltage Output Pull-Down Current Output Leakage Current Input Voltage Symbol VOUT VOUT IOUT IOUT VIN(1) IOUT VOUT 70°C VIN(0) Input Current IIN(1) Input lmpedance Supply Current outputs outputs open outputs OFF, outputs open outputs OFF, inputs outputs OFF, inputs output inputs output inputs
NOTE: Positive (negative) current defined going into (coming specified device pin.
Test Conditions
Min. 57.5 10.5 -0.3
Limits Max. 12.3 +0.8 10.5
Units
TYPICAL INPUT CIRCUIT
TYPICAL OUTPUT DRIVER
Dwg. EP-010-4A
Dwg. EP-021-3
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright 1984, 1996, Allegro MicroSystems, Inc.
BiMOS 8-BIT LATCHED SOURCE DRIVERS
UCN5815EP
Dwg. A-10,991
TIMING CONDITIONS
(VDD +25°C, Logic Levels Ground)
Minimum Data Active Time Before Strobe Enabled (Data Set-Up Time) Minimum Data Active Time After Strobe Disabled (Data Hold Time) Minimum Strobe Pulse Width Typical Time Between Strobe Activation Output Transition Typical Time Between Strobe Activation Output Transition Minimum Data Pulse Width
Dwg. A-14,357
Information present input transferred latch when STROBE ENABLE high. latches will continue accept data long both STROBE ENABLE held high. With either STROBE ENABLE state, information loaded into latches. When BLANKING input high, output buffers disabled (OFF) without affecting information stored latches. With BLANKING input low, outputs controlled state latches. timing conditions shown above guarantee minimum data input rate with supply. Typically, input rates above permitted. With supply, rates excess possible.
TRUTH TABLE
INPUTS STROBE ENABLE BLANK OUTN
irrelevant previous output state present output state
BiMOS 8-BIT LATCHED SOURCE DRIVERS
UCN5815A
Dimensions Inches
0.015 0.008
0.500 0.380 0.330
0.400
0.070 0.030
1.120 1.050
0.100
0.005
0.210
0.015
0.160 0.115 0.022 0.014
Dwg. MA-002-22
Dimensions Millimeters (Based 25.4
0.381 0.204
12.70 9.65 8.39
10.16
0.070 0.030
28.44 26.67
2.54
0.13
5.33
0.39
4.06 2.93
Dwg. MA-002-22
0.558 0.356 NOTES: Exact body lead configuration vendor's option within limits shown. Lead spacing tolerance non-cumulative. Lead thickness measured seating plane below.
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
BiMOS 8-BIT LATCHED SOURCE DRIVERS
UCN5815EP
Dimensions Inches
0.013 0.021 0.219 0.191
0.050
0.026 0.032 0.456 0.450 0.495 0.485
INDEX AREA
0.219 0.191
0.020
0.165 0.180
0.456 0.450 0.495 0.485
Dwg. MA-005-28A
Dimensions Millimeters (Based 25.4
0.331 0.533 5.56 4.85
1.27
0.812 0.661 11.58 11.43 12.57 12.32
INDEX AREA
5.56 4.85
0.51
4.57 4.20
11.582 11.430 12.57 12.32
Dwg. MA-005-28A
NOTES: Exact body lead configuration vendor's option within limits shown. Lead spacing tolerance non-cumulative.
BiMOS 8-BIT LATCHED SOURCE DRIVERS
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Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
BiMOS 8-BIT LATCHED SOURCE DRIVERS
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BiMOS 8-BIT LATCHED SOURCE DRIVERS
BiMOS (Series 5800) DABiC (Series 6800) INTELLIGENT POWER INTERFACE DRIVERS SELECTION GUIDE
Function
SERIAL-INPUT LATCHED DRIVERS 8-Bit (saturated drivers) 8-Bit 8-Bit 8-Bit 9-Bit 10-Bit (active pull-downs) 12-Bit (active pull-downs) 20-Bit (active pull-downs) 32-Bit (active pull-downs) 32-Bit 32-Bit (saturated drivers) PARALLEL-INPUT LATCHED DRIVERS 4-Bit 8-Bit 8-Bit SPECIAL-PURPOSE FUNCTIONS Unipolar Stepper Motor Translator/Driver Addressable 28-Line Decoder/Driver
Output Ratings
-120
Part Number
5895 5821 5841 5842 5829 5810-F 5811 5812-F 5818-F 5833 5832
5800 5815 5801
1.25
5804 6817
Current maximum specified test condition, voltage maximum rating. specification sustaining voltage limits. Negative current defined coming (sourcing) output.
Complete part number includes additional characters indicate operating temperature range package style. Internal transient-suppression diodes included inductive-load protection.
Allegro MicroSystems, Inc. reserves right make, from time time, such departures from detail specifications required permit improvements design products. Components made under military approvals will accordance with approval requirements. information included herein believed accurate reliable. However, Allegro MicroSystems, Inc. assumes responsibility use; infringements patents other rights third parties which result from use.
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
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