Global Specialties PB-502 Advanced Logic Design Trainer
Global Specialties PB-502 Advanced Logic Design Trainer
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Global Specialties PB-502
Features:
Compact Logic Design Trainer
Two Fully Debounced Pushbuttons With True Logic Outputs
TTL/CMOS Operation
8 SPST Logic Switches & Buffered LED Logic Indicators
Seven-Segment LCD Display
840 Tie Point Breadboard Area Using 1 UBS-100
Clock Outputs & 2 BNC’s Connected to Adjacent Tie Points
Description
PB-502 Advanced Logic Design Trainer
The PB-502 Advanced Logic Design Trainer permits students to avoid the repetitive building of frequently used circuits. All functions are interally connected to three solderless interconnect sockets with two tie points for each signal.
Selectable output voltage of clock, pulser, logic switches. Input voltage thresholds of seven segment displays, logic indicators and Vcc tie point between 5 volts, TTL: and 12 volts, CMOS.
Clock
1 Hz +20%; 1 kHz +20%. 100 kHz +20%. Also user variable with external capacitor. Logic “1” output current 2mA @ 4.0V min. (5 V/TTL); 4mA @ 11.0 V min. (12 V/CMOS). Logic “0” output current 2mA @ 0.1V max. (5 V/TTL); 5 mA@0.1V max (12 V/CMOS)
Pulsers
Two fully debounced pushbuttons with true logic and complementary outputs. Logic “1” output current 2 mA @ 2.5 V min. (5 V/TTL); 2 mA @ 11.0 V min. (12 V/CMOS) Logic “0” output current 2 mA @ 0.4V max. (5 V/TTL); 5 mA @ 0.4V max (12 V/CMOS)
Logic Switches
8 SPDT switches select output of Vcc or ground. Output current, all cases: 200 mA max
Logic Indicators
8 LEDs buffered by two four-bit latches with separate enables. Input impedance, all inputs: 100 k ohms
Seven-Segment Displays
Two BCD-input seven-segment displays with separate Display Enable (DE), Latch Enable (LE), and Lamp Test (LT) inputs. Input impedance, all inputs: 100 K ohms.
Connectors
All functions are permanently tied to three solderless tie point connectors. Each tie point has 2 solderless connection points. Ground, +5 volts, Vcc, and clock out have four connection points each. All tie point functions are labeled on the front panel.
BNCs
Two BNC connectors with the shells tied to ground and the pins connected to adjacent single tie points.
Breadboarding
One UBS-100 solderless breadboarding socket is permanently attached to the unit. The UBS-100 can accomodate up to eight 14-pin DIP ICs with five tie points per pin plus eight power rails with 25 tie points each.
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