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參數資料
| 型號： | SN74LS191N |
| 廠商： | MOTOROLA INC |
| 元件分類： | 通用總線功能 |
| 英文描述： | PRESETTABLE BCD/DECADE UP/DOWN COUNTERS PRESETTABLE 4-BIT BINARY UP/DOWN COUNTERS |
| 中文描述： | LS SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT BIDIRECTIONAL BINARY COUNTER, PDIP16 |
| 封裝： | PLASTIC, DIP-16 |
| 文件頁數： | 1/10頁 |
| 文件大小： | 310K |
| 代理商： | SN74LS191N |
5-341
FAST AND LS TTL DATA
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
NOTE:
The Flatpak version
has the same pinouts
(Connection Diagram) as
the Dual In-Line Package.
CONNECTION DIAGRAM DIP
(TOP VIEW)
PIN NAMES
LOADING
(Note a)
HIGH
LOW
CE
CP
U/D
PL
Pn
Qn
RC
TC
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)
b.
Temperature Ranges.
Count Enable (Active LOW) Input
Clock Pulse (Active HIGH going edge) Input
Up/Down Count Control Input
Parallel Load Control (Active LOW) Input
Parallel Data Inputs
Flip-Flop Outputs (Note b)
Ripple Clock Output (Note b)
Terminal Count Output (Note b)
1.5 U.L.
0.5 U.L.
0.5 U.L.
0.5 U.L.
0.5 U.L.
10 U.L.
10 U.L.
10 U.L.
0.7 U.L.
0.25 U.L.
0.25 U.L.
0.25 U.L.
0.25 U.L.
5 (2.5) U.L.
5 (2.5) U.L.
5 (2.5) U.L.
SN54/74LS190
SN54/74LS191
PRESETTABLE BCD/DECADE
UP/DOWN COUNTERS
PRESETTABLE 4-BIT BINARY
UP/DOWN COUNTERS
LOW POWER SCHOTTKY
J SUFFIX
CERAMIC
CASE 620-09
N SUFFIX
PLASTIC
CASE 648-08
16
1
16
1
ORDERING INFORMATION
SN54LSXXXJ
SN74LSXXXN
SN74LSXXXD
Ceramic
Plastic
SOIC
16
1
D SUFFIX
SOIC
CASE 751B-03
LOGIC SYMBOL
相關PDF資料 |
PDF描述 |
|---|---|
| SN54LS195J | UNIVERSAL 4-BIT SHIFT REGISTER |
| SN54LSXXXJ | UNIVERSAL 4-BIT SHIFT REGISTER |
| SN74LSXXXD | UNIVERSAL 4-BIT SHIFT REGISTER |
| SN74LSXXXN | UNIVERSAL 4-BIT SHIFT REGISTER |
| SN74LS195D | UNIVERSAL 4-BIT SHIFT REGISTER |
相關代理商/技術參數 |
參數描述 |
|---|---|
| SN74LS191N | 制造商:Texas Instruments 功能描述:Counter / Multiplier / Divider Logic IC |
| SN74LS191ND | 制造商:Motorola Inc 功能描述: |
| SN74LS191NE4 | 功能描述:計數器 IC 4-Bit Sync Up/Down RoHS:否 制造商:NXP Semiconductors 計數器類型:Binary Counters 邏輯系列:74LV 位數:10 計數法: 計數順序: 工作電源電壓:1 V to 5.5 V 工作溫度范圍:- 40 C to + 125 C 封裝 / 箱體:SOT-109 封裝:Reel |
| SN74LS191NSR | 功能描述:計數器 IC 4-Bit Sync Up/Down RoHS:否 制造商:NXP Semiconductors 計數器類型:Binary Counters 邏輯系列:74LV 位數:10 計數法: 計數順序: 工作電源電壓:1 V to 5.5 V 工作溫度范圍:- 40 C to + 125 C 封裝 / 箱體:SOT-109 封裝:Reel |
| SN74LS191NSRE4 | 功能描述:計數器 IC 4-Bit Sync Up/Down RoHS:否 制造商:NXP Semiconductors 計數器類型:Binary Counters 邏輯系列:74LV 位數:10 計數法: 計數順序: 工作電源電壓:1 V to 5.5 V 工作溫度范圍:- 40 C to + 125 C 封裝 / 箱體:SOT-109 封裝:Reel |
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