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SN74HC193

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4 位同步加/减计数器（具有清零的双路时钟）

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数据表

SN74HC193

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数据表 立即订购

产品详情

Function Counter Bits (#) 4 Technology family HC Supply voltage (min) (V) 2 Supply voltage (max) (V) 6 Input type Standard CMOS Output type Push-Pull Features Balanced outputs, High speed (tpd 10-50ns), Positive input clamp diode Operating temperature range (°C) -40 to 85 Rating Catalog
Function Counter Bits (#) 4 Technology family HC Supply voltage (min) (V) 2 Supply voltage (max) (V) 6 Input type Standard CMOS Output type Push-Pull Features Balanced outputs, High speed (tpd 10-50ns), Positive input clamp diode Operating temperature range (°C) -40 to 85 Rating Catalog
PDIP (N) 16 181.42 mm² 19.3 x 9.4 SOIC (D) 16 59.4 mm² 9.9 x 6 SOP (NS) 16 79.56 mm² 10.2 x 7.8 TSSOP (PW) 16 32 mm² 5 x 6.4
  • Wide Operating Voltage Range of 2 V to 6 V
  • Outputs Can Drive Up To 10 LSTTL Loads
  • Low Power Consumption, 80-µA Max ICC
  • Typical tpd = 20 ns
  • ±4-mA Output Drive at 5 V
  • Low Input Current of 1 µA Max
  • Look-Ahead Circuitry Enhances Cascaded Counters
  • Fully Synchronous in Count Modes
  • Parallel Asynchronous Load for Modulo-N Count Lengths
  • Asynchronous Clear
  • Wide Operating Voltage Range of 2 V to 6 V
  • Outputs Can Drive Up To 10 LSTTL Loads
  • Low Power Consumption, 80-µA Max ICC
  • Typical tpd = 20 ns
  • ±4-mA Output Drive at 5 V
  • Low Input Current of 1 µA Max
  • Look-Ahead Circuitry Enhances Cascaded Counters
  • Fully Synchronous in Count Modes
  • Parallel Asynchronous Load for Modulo-N Count Lengths
  • Asynchronous Clear

The ’HC193 devices are 4-bit synchronous, reversible, up/down binary counters. Synchronous operation is provided by having all flip-flops clocked simultaneously so that the outputs change coincidentally with each other when so 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) input (UP or DOWN). The direction of counting 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 (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 simply by modifying the count length with the preset inputs.

A clear (CLR) input has been provided that forces all outputs to the low level when a high level is applied. The clear function is independent of the count and LOAD\ inputs.

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

The ’HC193 devices are 4-bit synchronous, reversible, up/down binary counters. Synchronous operation is provided by having all flip-flops clocked simultaneously so that the outputs change coincidentally with each other when so 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) input (UP or DOWN). The direction of counting 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 (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 simply by modifying the count length with the preset inputs.

A clear (CLR) input has been provided that forces all outputs to the low level when a high level is applied. The clear function is independent of the count and LOAD\ inputs.

These counters were designed to be cascaded without the need for external circuitry. The borrow (BO)\ output produces a low-level pulse while the count is zero (all outputs low) and DOWN is low. Similarly, the carry (CO)\ output produces a low-level pulse while the count is maximum (9 or 15), and UP is low. The counters then can be cascaded easily by feeding BO\ and CO\ to DOWN and UP, respectively, of the succeeding counter.
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类型 标题 下载最新的英语版本 日期
* 数据表 SN54HC193, SN74HC193 数据表 (Rev. D) 2003年 10月 2日
应用手册 Implications of Slow or Floating CMOS Inputs (Rev. E) 2021年 7月 26日
选择指南 Logic Guide (Rev. AB) 2017年 6月 12日
应用手册 Understanding and Interpreting Standard-Logic Data Sheets (Rev. C) 2015年 12月 2日
选择指南 逻辑器件指南 2014 (Rev. AA) 最新英语版本 (Rev.AB) 2014年 11月 17日
用户指南 LOGIC Pocket Data Book (Rev. B) 2007年 1月 16日
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应用手册 CMOS Power Consumption and CPD Calculation (Rev. B) 1997年 6月 1日
应用手册 使用逻辑器件进行设计 (Rev. C) 1997年 6月 1日
应用手册 Input and Output Characteristics of Digital Integrated Circuits 1996年 10月 1日
应用手册 Live Insertion 1996年 10月 1日
应用手册 SN54/74HCT CMOS Logic Family Applications and Restrictions 1996年 5月 1日
应用手册 Using High Speed CMOS and Advanced CMOS in Systems With Multiple Vcc 1996年 4月 1日

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用户指南: PDF | HTML
英语版 (Rev.B): PDF | HTML
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封装 引脚 下载
PDIP (N) 16 查看选项
SOIC (D) 16 查看选项
SOP (NS) 16 查看选项
TSSOP (PW) 16 查看选项
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订购和质量

包含信息：
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息：
  • 制造厂地点
  • 封装厂地点

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