The LS190 is a synchronous Up / Down BCD Decade Counter and the LS191 is a synchronous Up / Down 4-Bit Binary Counter. The operating modes of the LS190 decade counter and the LS191 binary counter are identical, with the only difference being the count sequences as noted in the state diagrams. Each circuit contains four master / slave flip-flops, with interna.
ency
• Synchronous Counting
• Asynchronous Parallel Load
• Individual Preset Inputs
• Count Enable and Up/ Down Control Inputs
• Cascadable
• Input Clamp Diodes Limit High Speed Termination Effects
CONNECTION DIAGRAM DIP (TOP VIEW)
VCC 16
P0 15
CP 14
RC 13
TC 12
PL 11
P2 10
P3 9
NOTE: The Flatpak version has the same pinouts (Connection Diagram) as the Dual In-Line Package.
1 P1
2 Q1
3 Q0
4 CE
5 U/D
6 Q2
7 Q3
8 GND
PIN NAMES
LOADING (Note a)
HIGH
LOW
CE Count Enable (Active LOW) Input
1.5 U.L.
0.7 U.L.
CP Clock Pulse (Active HIGH going edge) Input 0.5 U.L. 0.25 U.L.
.
SN54190, SN54191, SN54LS190, SN54LS191, SN74190, SN74191, SN74LS190, SN74LS191 SYNCHRONOUS UP/DOWN COUNTERS WITH DOWN/UP.
No. | Partie # | Fabricant | Description | Fiche Technique |
---|---|---|---|---|
1 | SN74LS191 |
Texas Instruments |
SYNCHRONOUS UP/DOWN COUNTERS | |
2 | SN74LS191 |
Motorola |
PRESETTABLE BCD/DECADE UP/DOWN COUNTERS | |
3 | SN74LS192 |
ON Semiconductor |
UP/DOWN COUNTER | |
4 | SN74LS192 |
Motorola |
PRESETTABLE BCD/DECADEUP/DOWN COUNTER | |
5 | SN74LS192 |
Texas Instruments |
SYNCHRONOUS 4-BIT UP/DOWN COUNTERS | |
6 | SN74LS193 |
Motorola |
PRESETTABLE 4-BIT BINARYUP/DOWN COUNTER | |
7 | SN74LS193 |
Texas Instruments |
SYNCHRONOUS 4-BIT UP/DOWN COUNTERS | |
8 | SN74LS194A |
ON Semiconductor |
4?Bit Bidirectional Universal Shift Register | |
9 | SN74LS194A |
Motorola |
4-BIT BIDIRECTIONAL UNIVERSAL SHIFT REGISTER | |
10 | SN74LS194A |
Texas Instruments |
4-Bit Bidirectional Universal Shift Registers | |
11 | SN74LS195A |
ON Semiconductor |
Universal 4-Bit Shift Register | |
12 | SN74LS195A |
Motorola |
UNIVERSAL 4-BIT SHIFT REGISTER |