DataSheetWiki


54191 fiches techniques PDF

Motorola Semiconductors - PRESETTABLE 4-BIT BINARY UP/DOWN COUNTERS

Numéro de référence 54191
Description PRESETTABLE 4-BIT BINARY UP/DOWN COUNTERS
Fabricant Motorola Semiconductors 
Logo Motorola Semiconductors 





1 Page

No Preview Available !





54191 fiche technique
PRESETTABLE BCD/DECADE
UP/DOWN COUNTERS
PRESETTABLE 4-BIT BINARY
UP/DOWN COUNTERS
The SN54 / 74LS190 is a synchronous UP/ DOWN BCD Decade (8421)
Counter and the SN54/ 74LS191 is a synchronous UP / DOWN Modulo-16
Binary Counter. State changes of the counters are synchronous with the
LOW-to-HIGH transition of the Clock Pulse input.
An asynchronous Parallel Load (PL) input overrides counting and loads the
data present on the Pn inputs into the flip-flops, which makes it possible to use
the circuits as programmable counters. A Count Enable (CE) input serves as
the carry / borrow input in multi-stage counters. An Up / Down Count Control
(U/D) input determines whether a circuit counts up or down. A Terminal Count
(TC) output and a Ripple Clock (RC) output provide overflow/underflow
indication and make possible a variety of methods for generating
carry / borrow signals in multistage counter applications.
Low Power . . . 90 mW Typical Dissipation
High Speed . . . 25 MHz Typical Count Frequency
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.
U / D Up/Down Count Control Input
0.5 U.L.
0.25 U.L.
PL Parallel Load Control (Active LOW) Input
0.5 U.L.
0.25 U.L.
Pn Parallel Data Inputs
Qn Flip-Flop Outputs (Note b)
RC Ripple Clock Output (Note b)
0.5 U.L.
10 U.L.
10 U.L.
0.25 U.L.
5 (2.5) U.L.
5 (2.5) U.L.
TC Terminal Count Output (Note b)
10 U.L. 5 (2.5) U.L.
NOTES:
a. 1 TTL Unit Load (U.L.) = 40 µA HIGH/1.6 mA LOW.
b. The Output LOW drive factor is 2.5 U.L. for Military (54) and 5 U.L. for Commercial (74)
b. Temperature Ranges.
FAST AND LS TTL DATA
5-341
SN54/74LS190
SN54/74LS191
PRESETTABLE BCD/ DECADE
UP/ DOWN COUNTERS
PRESETTABLE 4-BIT BINARY
UP/ DOWN COUNTERS
LOW POWER SCHOTTKY
16
1
J SUFFIX
CERAMIC
CASE 620-09
16
1
N SUFFIX
PLASTIC
CASE 648-08
16
1
D SUFFIX
SOIC
CASE 751B-03
ORDERING INFORMATION
SN54LSXXXJ
SN74LSXXXN
SN74LSXXXD
Ceramic
Plastic
SOIC
LOGIC SYMBOL
11 15 1 10 9
5
4
14
PL
U/D
P0 P1 P2
P3
RC
CE
CP
Q0 Q1
TC
Q2 Q3
32 6 7
VCC = PIN 16
GND = PIN 8
13
12

PagesPages 10
Télécharger [ 54191 ]


Fiche technique recommandé

No Description détaillée Fabricant
54190 Synchronous Decade Up/Down Counters National Semiconductor
National Semiconductor
54190 4 BIT SYNCHRONOUS UP/DOWN COUNTERS SGS-THOMSON
SGS-THOMSON
54190 Synchronous Up/Down Counters With Down/Up Mode Control Texas Instruments
Texas Instruments
54190 PRESETTABLE 4-BIT BINARY UP/DOWN COUNTERS Motorola Semiconductors
Motorola Semiconductors

US18650VTC5A

Lithium-Ion Battery

Sony
Sony
TSPC106

PCI Bus Bridge Memory Controller

ATMEL
ATMEL
TP9380

NPN SILICON RF POWER TRANSISTOR

Advanced Semiconductor
Advanced Semiconductor


www.DataSheetWiki.com    |   2020   |   Contactez-nous  |   Recherche