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SN74HC193-Q1 データシート(PDF) 1 Page - Texas Instruments |
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SN74HC193-Q1 データシート(HTML) 1 Page - Texas Instruments |
1 / 13 page SN74HC193Q1 4BIT SYNCHRONOUS UP/DOWN COUNTER (DUAL CLOCK WITH CLEAR) SCLS594A − NOVEMBER 2004 − REVISED APRIL 2008 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D Qualified for Automotive Applications D Wide Operating Voltage Range of 2 V to 6 V D Outputs Can Drive Up To 10 LSTTL Loads D Low Power Consumption, 80-µA Max ICC D Typical tpd = 20 ns D ±4-mA Output Drive at 5 V D Low Input Current of 1 µA Max D Look-Ahead Circuitry Enhances Cascaded Counters D Fully Synchronous in Count Modes D Parallel Asynchronous Load for Modulo-N Count Lengths D Asynchronous Clear description/ordering information The SN74HC193 device is a 4-bit synchronous, reversible, up/down binary counter. Synchronous operation is provided by having all flip-flops clocked simultaneously so that the outputs change simultaneously with each other when dictated 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. This counter was 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 counter then can be cascaded easily by feeding BO and CO to DOWN and UP, respectively, of the succeeding counter. ORDERING INFORMATION{ TA PACKAGE‡ ORDERABLE PART NUMBER TOP-SIDE MARKING −40 °C to 125°C TSSOP − PW Reel of 2000 SN74HC193QPWRQ1 HC193Q −40 °C to 85°C TSSOP − PW Reel of 2000 SN74HC193IPWRQ1 HC193I † For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI web site at http://www.ti.com. ‡ Package drawings, thermal data, and symbolization are available at http://www.ti.com/packaging. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 B QB QA DOWN UP QC QD GND VCC A CLR BO CO LOAD C D PW PACKAGE (TOP VIEW) Copyright 2008, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
同様の部品番号 - SN74HC193-Q1 |
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同様の説明 - SN74HC193-Q1 |
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