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参数资料
| 型号： | SN74LS161AN3 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 计数器 |
| 英文描述： | LS SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT UP BINARY COUNTER, PDIP16 |
| 封装： | DIP-16 |
| 文件页数： | 18/26页 |
| 文件大小： | 803K |
| 代理商： | SN74LS161AN3 |
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Datasheets
Full datasheet in Acrobat PDF: sdls060.pdf (756 KB)
clear allows the count length to be modified easily as decoding the maximum count desired
can be accomplished with one external NAND gate. The gate output is connected to the
clear input to synchronously clear the counter to 0000 (LLLL). Low-to-high transitions at the
clear input of the '162 and '163 should be avoided when the clock is low if the enable and
load inputs are high at or before the transition.
The carry look-ahead circuitry provides for cascading counters for n-bit synchronous
applications without additional gating. Instrumental in accomplishing this function are two
count-enable inputs and a ripple carry output. Both count-enable inputs (P and T) must be
high to count, and input T is fed forward to enable the ripple carry output. The ripple carry
output thus enabled will produce a high-level output pulse with a duration approximately
equal to the high-level portion of the Q
A output. This high-level overflow ripple carry pulse
can be used to enable successive cascaded stages. High-to-low level transitions at the enable
P or T inputs of the '160 thru '163 should occur only when the clock input is high.
Transitions at the enable P or T inputs of the 'LS160A thru 'LS163A or 'S162 and 'S163 are
allowed regardless of the level of the clock input.
'LS160A thru 'LS163A, 'S162 and 'S163 feature a fully independent clock circuit. Changes
at control inputs (enable P or T, or load) that will modify the operating mode have no effect
until clocking occurs. The function of the counter (whether enabled, disabled, loading, or
counting) will be dictated solely by the conditions meeting the stable setup and hold times.
'160, '161, 'LS160A, 'LS161A … SYNCHRONOUS
COUNTERS WITH DIRECT CLEAR '162, '163,
'LS162A, 'LS163A, 'S162, 'S163 … FULLY
SYNCHRONOUS COUNTERS
l
Internal Look-Ahead for Fast Counting
l
Carry Output for n-Bit Cascading
l
Synchronous Counting
l
Synchronously Programmable
l
Load Control Line
l
Diode-Clamped Inputs
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SN74LS161ANE4 | 功能描述:计数器 IC 4-Bit Synchronous Binary Counters RoHS:否 制造商:NXP Semiconductors 计数器类型:Binary Counters 逻辑系列:74LV 位数:10 计数法: 计数顺序: 工作电源电压:1 V to 5.5 V 工作温度范围:- 40 C to + 125 C 封装 / 箱体:SOT-109 封装:Reel |
| SN74LS161ANS | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述: |
| SN74LS161ANSR | 功能描述:计数器 IC 4-Bit Synchronous Binary Counters RoHS:否 制造商:NXP Semiconductors 计数器类型:Binary Counters 逻辑系列:74LV 位数:10 计数法: 计数顺序: 工作电源电压:1 V to 5.5 V 工作温度范围:- 40 C to + 125 C 封装 / 箱体:SOT-109 封装:Reel |
| SN74LS161ANSRE4 | 功能描述:计数器 IC 4-Bit Synchronous Binary Counters RoHS:否 制造商:NXP Semiconductors 计数器类型:Binary Counters 逻辑系列:74LV 位数:10 计数法: 计数顺序: 工作电源电压:1 V to 5.5 V 工作温度范围:- 40 C to + 125 C 封装 / 箱体:SOT-109 封装:Reel |
| SN74LS161ANSRG4 | 功能描述:计数器 IC Sync 4B Binary Counters RoHS:否 制造商:NXP Semiconductors 计数器类型:Binary Counters 逻辑系列:74LV 位数:10 计数法: 计数顺序: 工作电源电压:1 V to 5.5 V 工作温度范围:- 40 C to + 125 C 封装 / 箱体:SOT-109 封装:Reel |
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