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參數(shù)資料
| 型號： | SN54LS290J |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 通用總線功能 |
| 英文描述： | Octal D-Type Flip-Flop with 3-State Outputs; Package: TSSOP 20 LEAD; No of Pins: 20; Container: Tape and Reel; Qty per Container: 2500 |
| 中文描述： | LS SERIES, ASYN NEGATIVE EDGE TRIGGERED 3-BIT UP DECADE COUNTER, CDIP14 |
| 封裝： | CERAMIC, DIP-14 |
| 文件頁數(shù)： | 1/5頁 |
| 文件大?。?/td> | 74K |
| 代理商： | SN54LS290J |
5-1
FAST AND LS TTL DATA
DECADE COUNTER;
4-BIT BINARY COUNTER
The SN54/74LS290 and SN54/74LS293 are high-speed 4-bit ripple type
counters partitioned into two sections. Each counter has a divide-by-two sec-
tion and either a divide-by-five (LS290) or divide-by-eight (LS293) section
which are triggered by a HIGH-to-LOW transition on the clock inputs. Each
section can be used separately or tied together (Q to CP)to form BCD,
Bi-quinary, or Modulo-16 counters. Both of the counters have a 2-input gated
Master Reset (Clear), and the LS290 also has a 2-input gated Master Set
(Preset 9).
Corner Power Pin Versions of the LS90 and LS93
Low Power Consumption . . . Typically 45 mW
High Count Rates . . . Typically 42 MHz
Choice of Counting Modes . . . BCD, Bi-Quinary, Binary
Input Clamp Diodes Limit High Speed Termination Effects
14
13
12
11
10
9
1
2
3
4
5
6
8
7
VCC
MR
MR
CP1
CP0
Q0
Q3
MS
NC
MS
Q2
Q1
NC
GND
CONNECTION DIAGRAM DIP
(TOP VIEW)
LS290
LS293
NOTE:
The Flatpak version
has the same pinouts
(Connection Diagram) as
the Dual In-Line Package.
14
13
12
11
10
9
1
2
3
4
5
6
8
7
VCC
MR
MR
CP1
CP0
Q0
Q3
NC
NC
NC
Q2
Q1
NC
GND
PIN NAMES
LOADING
(Note a)
HIGH
LOW
CP0
CP1
CP1
MR1, MR2
MS1, MS2
Q0
Q1, Q2, Q3
Clock (Active LOW going edge) Input to
÷
2 Section.
Clock (Active LOW going edge) Input to
÷
5 Section (LS290).
Clock (Active LOW going edge) Input to
÷
8 Section (LS293).
Master Reset (Clear) Inputs
Master Set (Preset-9, LS290) Inputs
Output from
÷
2 Section (Notes b & c)
Outputs from
÷
5 &
÷
8 Sections (Note b)
0.05 U.L.
0.05 U.L.
0.05 U.L.
0.5 U.L.
0.5 U.L.
10 U.L.
10 U.L.
1.5 U.L.
2.0 U.L.
1.0 U.L.
0.25 U.L.
0.25 U.L.
5 (2.5) U.L.
5 (2.5) U.L.
NOTES:
a) 1 TTL Unit Load (U.L.) = 40
μ
A 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) Temperature Ranges.
c) The Q0 Outputs are guaranteed to drive the full fan-out plus the CP1 Input of the device.
SN54/74LS290
SN54/74LS293
DECADE COUNTER;
4-BIT BINARY COUNTER
LOW POWER SCHOTTKY
ORDERING INFORMATION
SN54LSXXXJ
SN74LSXXXN
SN74LSXXXD
Ceramic
Plastic
SOIC
J SUFFIX
CERAMIC
CASE 632-08
N SUFFIX
PLASTIC
CASE 646-06
14
1
14
1
14
1
D SUFFIX
SOIC
CASE 751A-02
相關PDF資料 |
PDF描述 |
|---|---|
| SN74LS290N | DECADE COUNTER; 4-BIT BINARY COUNTER |
| SN74LS293D | DECADE COUNTER; 4-BIT BINARY COUNTER |
| SN74LS293N | DECADE COUNTER; 4-BIT BINARY COUNTER |
| SN74LS290D | DECADE COUNTER; 4-BIT BINARY COUNTER |
| SN74LS290N | DECADE COUNTER; 4-BIT BINARY COUNTER |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SN54LS295BJ/SCA | 制造商:Texas Instruments 功能描述: |
| SN54LS298J | 制造商:Texas Instruments 功能描述: 制造商:Texas Instruments 功能描述:QUAD 2-INPUT MULTIPLEXER - Rail/Tube |
| SN54LS299J | 制造商:Texas Instruments 功能描述:Shift Register Single 8-Bit Serial/Parallel to Serial/Parallel 20-Pin CDIP Tube |
| SN54LS30J | 制造商:Texas Instruments 功能描述: |
| SN54LS32J | 制造商:Texas Instruments 功能描述:OR Gate 4-Element 2-IN Bipolar 14-Pin CDIP Tube 制造商:Texas Instruments 功能描述:OR GATE 4-ELEM 2-IN BIPOLAR 14CDIP - Rail/Tube 制造商:Texas Instruments 功能描述:IC LOGIC GATE QUAD 2-INPUT OR LS-TTL |
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