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参数资料
| 型号： | SN54LS293J |
| 厂商： | ON SEMICONDUCTOR |
| 元件分类： | 计数器 |
| 英文描述： | Octal D-Type Flip-Flop with 3-State Outputs; Package: 20 LEAD PDIP; No of Pins: 20; Container: Rail; Qty per Container: 18 |
| 中文描述： | LS SERIES, ASYN NEGATIVE EDGE TRIGGERED 3-BIT UP BINARY COUNTER, CDIP14 |
| 封装： | CERAMIC, DIP-14 |
| 文件页数： | 1/7页 |
| 文件大小： | 162K |
| 代理商： | SN54LS293J |
Semiconductor Components Industries, LLC, 2006
July, 2006 Rev. 6
1
Publication Order Number:
SN74LS290/D
SN74LS290
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 section 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
123456
8
7
VCC
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 Pack-
age.
14
13
12
11
10
9
123456
8
7
VCC
MR
CP1 CP0
Q0
Q3
NC
Q2
Q1
NC GND
PIN NAMES
LOADING (Note a)
HIGH
LOW
CP0
Clock (Active LOW going edge) Input to ÷ 2 Section.
0.05 U.L.
1.5 U.L.
CP1
Clock (Active LOW going edge) Input to ÷ 5 Section (LS290).
0.05 U.L.
2.0 U.L.
CP1
Clock (Active LOW going edge) Input to ÷ 8 Section (LS293).
0.05 U.L.
1.0 U.L.
MR1, MR2
Master Reset (Clear) Inputs
0.5 U.L.
0.25 U.L.
MS1, MS2
Master Set (Preset-9, LS290) Inputs
0.5 U.L.
0.25 U.L.
Q0
Output from ÷ 2 Section (Notes b & c)
10 U.L.
5 (2.5) U.L.
Q1, Q2, Q3
Outputs from ÷ 5 & ÷ 8 Sections (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) Temperature Ranges.
c) The Q0 Outputs are guaranteed to drive the full fan-out plus the CP1 Input of the device.
http://onsemi.com
DECADE COUNTER;
4-BIT BINARY COUNTER
LOW POWER
SCHOTTKY
J SUFFIX
CERAMIC
CASE 632-08
N SUFFIX
PLASTIC
CASE 646-06
14
1
14
1
14
1
D SUFFIX
SOIC
CASE 751A-02
ORDERING INFORMATION
SN54LSXXXJ
Ceramic
SN74LSXXXN
Plastic
SN74LSXXXD
SOIC
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