SN54ALS193A_TI 具有双时钟的同步 4 位加/减二进制计数器

SN54ALS193A的基本参数

制造厂商：TI
产品类别：逻辑和电压转换
技术类目：触发器、锁存器和寄存器 - 计数器
功能描述：具有双时钟的同步 4 位加/减二进制计数器
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SN54ALS193A的产品详情：

The 'ALS193A are synchronous, reversible, 4-bit up/down binary counters. Synchronous counting operation is provided by having all flip-flops clocked simultaneously so that the outputs change coincident with each other when instructed by the steering logic. This mode of operation eliminates the output counting spikes normally associated with asynchronous (ripple-clock) counters.

The outputs of the four flip-flops are triggered on a low-to-high-level transition of either count/clock (UP or DOWN) input. The direction of the count is determined by which count input is pulsed while the other count input is high.

All four counters are fully programmable; that is, each output may be preset to either level by placing a low on the load () input and entering the desired data at the data inputs. The output changes to agree with the data inputs independently of the count pulses. This feature allows the counters to be used as modulo-N dividers by simply modifying the count length with the preset inputs.

A high level applied to the clear (CLR) input forces all outputs to the low level. The clear function is independent of the count and i nputs. The UP, DOWN, and inputs are buffered to lower the drive requirement, which significantly reduces the loading on, or current required by, clock drivers, etc., for long parallel words.

These counters are designed to be cascaded without the need for external circuitry. The borrow () output produces a low-level pulse while the count is zero (all Q outputs low) and the DOWN input is low. Similarily, the carry (CO\) output produces a low-level pulse while the count is 9 or 15 (all Q outputs high) and the UP input is low. The counters can then be easily cascaded by feeding and to the count-down and count-up inputs, respectively, of the succeeding counter.

The SN54ALS193A is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74ALS193A is characterized for operation from 0°C to 70°C.

SN54ALS193A的优势和特性：

Look-Ahead Circuitry Enhances Cascaded Counters
Fully Synchronous in Count Modes
Parallel Asynchronous Load for Modulo-N Count Lengths
Asynchronous Clear
Package Options Include Plastic Small-Outline (D) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs

SN54ALS193A的参数（英文）：

Function
Counter
Bits (#)
4
Technology Family
ALS
Supply voltage (Min) (V)
4.5
Supply voltage (Max) (V)
5.5
Input type
Bipolar
Output type
Push-Pull
Features
High speed (tpd 10-50ns)

SN54ALS193A具体的完整产品型号参数及价格（美元）：

SN54ALS193A的完整型号有：5962-8869801EA、5962-8869801FA、SN54ALS193AJ、SNJ54ALS193AJ、SNJ54ALS193AW，以下是这些产品的关键参数及官网采购报价：

5962-8869801EA，工作温度：-55 to 125，封装：CDIP (J)-16，包装数量MPQ：1个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：SNPB，TI官网5962-8869801EA的批量USD价格：12.257（1000+）

5962-8869801FA，工作温度：-55 to 125，封装：CFP (W)-16，包装数量MPQ：1个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：SNPB，TI官网5962-8869801FA的批量USD价格：26.491（1000+）

SN54ALS193AJ，工作温度：-55 to 125，封装：CDIP (J)-16，包装数量MPQ：1个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：SNPB，TI官网SN54ALS193AJ的批量USD价格：8.303（1000+）

SNJ54ALS193AJ，工作温度：-55 to 125，封装：CDIP (J)-16，包装数量MPQ：1个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：SNPB，TI官网SNJ54ALS193AJ的批量USD价格：12.257（1000+）

SNJ54ALS193AW，工作温度：-55 to 125，封装：CFP (W)-16，包装数量MPQ：1个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：SNPB，TI官网SNJ54ALS193AW的批量USD价格：26.491（1000+）

SN54ALS193A的评估套件：

SN54ALS193A的电路图解：

SN54ALS193A的评估套件：