Tokheim Digital Electronics Chapter 8 ICs
What is the 74192's counting range?
0-9
How many pins is the 7493 DIP?
14 pins
How many pins is the 74192 DIP?
16 or 20 pins
How many 4-bit binary ripple counters are contained in the 74HC393?
2 counters
How many cascade decade counters are contained in the 4553?
3 cascade decade counters
How many bits is the internal wiring of the 7493?
3-bit
How many T flip-flops are contained in each 4-bit counter for the 74HC393?
4 T-flip-flops
How many bits is the 7493?
4-bit
What is the function of the 74HC393 IC?
4-bit binary ripple
What is the function of the 74HC85?
4-bit magnitude comparator
What is the multiplexing rate of the 4553 IC?
40-80 Hz
What IC is the 4543 often paired with?
4553 BCD counter
What are the binary guess pins of the 74HC85?
A inputs
What does a yellow LED mean for the 74HC85?
A is less than B
What does a red LED mean for the 74HC85?
A is too high
What does a green LED mean for the 74HC85
A matches B
Is the MR pin for the 74HC393 asynchronous or synchronous?
Asynchronous
What inputs represent the number the binary guess should match for the 74HC85?
B inputs
What is the function of the 4543?
BCD-to-seven-segment decoder/driver
Is CLR active-HIGH or LOW for the 74192?
CLR = active-HIGH
What is CLK called in the 74HC393?
CP-not
How can longer words be made for comparison for the 74HC85?
Cascade multiple 74HC85 ICs
What must you do to make a 7493 a 4-bit counter?
Connect QA to QB CLK input
What is the function of the 7447 IC?
Decoder/driver
What do the latches feed in the 4553?
Display multiplexer
What must MR be connected to to operate?
Ground
What does the lamp test in the 7447 do?
It activates all outputs
Is the blanking input in the 7447 active-HIGH or LOW?
It is active-HIGH
What does C1 do for the 4553 IC?
It scans the oscillator frequency
What does the blanking input in the 7447 do?
It turns all attached displays off
What is PS called for the 74192 and is it active-HIGH or LOW?
Load = active-LOW
How is PL-not activated for the 74HC193?
NAND gate
What is the triggering of the 7493?
Negative-edge
Is the 4553 IC negative- or positive-edge triggered?
Negative-edge triggered
is the 74HC393 positive-or negative-edge triggered?
Negative-edge triggered
What pin preset the load for the 74HC193?
Parallel load (PL-not)
What pin is GND for the 7493?
Pin 10
What pin is Vcc for the 7493?
Pin 5
Is the 74192 positive- or negative-edge triggered?
Positive-edge triggered
What must the opposite clock be connected to in order to operate in the 74HC193
Power
What is the function of the 74HC193?
Presettable 4-bit up-down counter
What happens when QA is connected to QD of the 7493?
QA becomes the MSD and the counter is biquinary.
What gate resets the 7493 and what are the input names of it?
R0(1) and R0(2) are the inputs to the NAND gate
Is the 7493 ripple or synchronous
Ripple
Is the 74192 asynchronous or synchronous?
Synchronous
What are the BCD outputs of the 4553 fed to?
Three 4-bit transparent latches
What direction can the 7493 count?
Up
Does the 4553 IC contain a pulse shaper?
Yes
Are the BCD outputs for the 4553 IC active-HIGH or LOW?
active-HIGH
Are the Disable clock, master reset, and latch enable inputs active-HIGH or LOW for the 4553?
active-HIGH
Is master reset (MR) for the 74HC193 active-HIGH or LOW?
active-HIGH
Is the MR pin active-HIGH or active-LOW for the 74HC393?
active-HIGH
Are the digit select pins for the 4553 IC active-HIGH or LOW?
active-LOW
Is ripple-blanking in the 7447 active-HIGH or LOW?
active-LOW
Is the lamp test input for the 7447 active-HIGH or LOW?
active-LOW
What direction can the 74192 count?
up and down
