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參數(shù)資料
| 型號(hào)： | SN74LS490N |
| 廠商： | MOTOROLA INC |
| 元件分類： | 通用總線功能 |
| 英文描述： | 1A, 5V,±4% Tolerance, Negative Voltage Regulator, Ta = 0°C to +125&x0176;C; Package: TO-220, SINGLE GAUGE; No of Pins: 3; Container: Rail; Qty per Container: 50 |
| 中文描述： | LS SERIES, ASYN NEGATIVE EDGE TRIGGERED 4-BIT UP DECADE COUNTER, PDIP16 |
| 封裝： | PLASTIC, DIP-16 |
| 文件頁數(shù)： | 1/5頁 |
| 文件大小： | 161K |
| 代理商： | SN74LS490N |
LOGIC DIAGRAM
(ONE HALF SHOWN)
TRUTH TABLE
5-563
FAST AND LS TTL DATA
DUAL DECADE COUNTER
The SN54/74LS490 contains a pair of high-speed 4-stage ripple counters.
Each half of the SN54/74LS490 has individual Clock, Master Reset and Mas-
ter Set (Preset 9) inputs. Each section counts in the 8, 4, 2, 1 BCD code.
Dual Version of SN54/74LS490
Individual Asynchronous Clear and Preset to 9 for Each Counter
Count Frequency — Typically 65 MHz
Input Clamp Diodes Limit High-Speed Termination Effects
CONNECTION DIAGRAM DIP
(TOP VIEW)
PIN NAMES
LOADING
(Note a)
HIGH
LOW
MS
MR
CP
Q0–Q3
Master Set (Set to 9) Input
Master Reset
Clock Input (Active LOW Going Edge)
Counter Outputs (Note b)
0.5 U.L.
0.5 U.L.
1.5 U.L.
10 U.L.
0.25 U.L.
0.25 U.L.
1.5 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.
OUTPUTS
COUNT
Q3
L
L
L
Q2
L
L
L
Q1
L
L
H
Q0
L
H
L
0
1
2
3
4
5
L
L
L
L
H
H
H
L
L
H
L
H
6
7
8
9
L
L
H
H
H
H
L
L
H
H
L
L
L
H
L
H
SN54/74LS490
DUAL DECADE COUNTER
LOW POWER SCHOTTKY
ORDERING INFORMATION
SN54LSXXXJ
SN74LSXXXN
SN74LSXXXD
Ceramic
Plastic
SOIC
J SUFFIX
CERAMIC
CASE 620-09
N SUFFIX
PLASTIC
CASE 648-08
16
1
16
1
16
1
D SUFFIX
SOIC
CASE 751B-03
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SN74LS51D | 1A, 8V,±2% Tolerance, Negative Voltage Regulator, Ta = 0°C to +125°C; Package: TO-220, SINGLE GAUGE; No of Pins: 3; Container: Rail; Qty per Container: 50 |
| SN74LS51N | 1A, 8V,±4% Tolerance, Negative Voltage Regulator, Ta = 0°C to +125°C; Package: 3 LEAD D2PAK; No of Pins: 3; Container: Tape and Reel; Qty per Container: 800 |
| SN74LS54D | 1A, 15V,±4% Tolerance, Negative Voltage Regulator, Ta = 0°C to +125°C; Package: 3 LEAD D2PAK; No of Pins: 3; Container: Tape and Reel; Qty per Container: 800 |
| SN74LS54N | 1A, 15V,±4% Tolerance, Negative Voltage Regulator, Ta = 0°C to +125°C; Package: TO-220, SINGLE GAUGE; No of Pins: 3; Container: Rail; Qty per Container: 50 |
| SN74LS55D | 1A, 15V,±4% Tolerance, Negative Voltage Regulator, Ta = 0°C to +125°C; Package: TO-220, SINGLE GAUGE; No of Pins: 3; Container: Rail; Qty per Container: 50 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SN74LS4N | 制造商:Motorola Inc 功能描述: |
| SN74LS508N | 制造商:Texas Instruments 功能描述: |
| SN74LS51D | 功能描述:邏輯門 AND-OR-Invert Gate RoHS:否 制造商:Texas Instruments 產(chǎn)品:OR 邏輯系列:LVC 柵極數(shù)量:2 線路數(shù)量（輸入/輸出）:2 / 1 高電平輸出電流:- 16 mA 低電平輸出電流:16 mA 傳播延遲時(shí)間:3.8 ns 電源電壓-最大:5.5 V 電源電壓-最小:1.65 V 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DCU-8 封裝:Reel |
| SN74LS51DE4 | 功能描述:邏輯門 AND-OR-Invert Gate RoHS:否 制造商:Texas Instruments 產(chǎn)品:OR 邏輯系列:LVC 柵極數(shù)量:2 線路數(shù)量（輸入/輸出）:2 / 1 高電平輸出電流:- 16 mA 低電平輸出電流:16 mA 傳播延遲時(shí)間:3.8 ns 電源電壓-最大:5.5 V 電源電壓-最小:1.65 V 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DCU-8 封裝:Reel |
| SN74LS51DG4 | 功能描述:邏輯門 2W 2Inpt 2W 3Inpt AND OR Invert Gate RoHS:否 制造商:Texas Instruments 產(chǎn)品:OR 邏輯系列:LVC 柵極數(shù)量:2 線路數(shù)量（輸入/輸出）:2 / 1 高電平輸出電流:- 16 mA 低電平輸出電流:16 mA 傳播延遲時(shí)間:3.8 ns 電源電壓-最大:5.5 V 電源電壓-最小:1.65 V 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DCU-8 封裝:Reel |
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