74LS, 74LS Datasheet, 74LS Decade Up/Down Counter Datasheet, buy 74LS, 74LS pdf, ic 74LS Datasheet – Free download as PDF File .pdf), Text File .txt) or read online for free. Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise .

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Search the history of over billion web pages on the Internet. Full text of ” IC Datasheet: Synchronous operation Is provided by having all flip-flops clocked simultaneously so that the outputs change coincidently with each other when so instructed by the steering logic.

This mode of operation eliminates the output counting spikes which are normally associated with asynchronous ripple- clock counters. The outputs of the four master-slave flip-flops are trig- gered by a low-to-high-level transition of either count clock input. The direction of counting is determined by which count input Is pulsed while the other count input is high. The output will change to agree with the data In- puts 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 clear Input has been provided which forces all outputs to the low level when a high level is applied. The clear function is independent of the count and load Inputs.

Datasheet PDF –

The clear, count, and load inputs are buffered to lower the drive requirements. This reduces the number of clock drivers, etc.

These counters were designed to be cascaded without the need for external circuitry.

Both borrow and carry outputs are available to cascade both dataeheet up- and down-counting functions. The borrow output produces a pulse equal in width to the count-down input when the counter underflows, Similarly, the carry output produces a pulse equal in width to the count-up Input when an overflow condition exists. The counters can then be easily cascaded by feeding the borrow and carry outputs to the count-down and count-up inputs respectively of the succeeding counter. Voltage values are with respect to network ground terminal.

Production processing does not necessarily include vl’V testing of all parameters. Clear outputs to zero. Load preset to BCD seven. Count up to eight, nine, carry, datasneet, one, and two. Count down to one, zero, borrow, nine, eight, and seven. Clear overrides load, data, and count inputs. When counting up, count-down Input must be high; when counting down, count-up input must be high.

Load preset to binary thirteen. Count up to fourteen, fifteen, carry, zero, one, and two. Count down to one, zero, borrow, fifteen, fourteen, and thirteen. When counting up, count-down input must be high; when counting down, datxsheet input must be high.


Iqq is measured with all outputs open, clear and load inputs grounded, and all other Inputs at 4. Iqq is measured with all outputs open, clear and load inputs grounded, and all other inputs at 4. The pulse generators have the following characteristics: Cl includes probe and jig capacitance. Diodes are 1 N or equivalent.

Cout-up and dount-down pulse shown are for the ‘ 1 93 and ‘LS 1 93 binary counters. Count cycle for ‘ 1 92 and ‘LS 1 92 decade counters is 1 through Cout-up and dount-down pulse shown are for the ‘ and ‘LSI 93 binary counters.


Count cycle for ‘ and ‘LSI 92 decade counters is 1 through Vref is V for ‘ and ‘, 1. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to Tl’s terms and conditions of sale supplied at the time of order acknowledgment. Tl warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with Tl’s standard warranty. Testing and other quality control techniques are used to the extent Tl deems necessary to support this warranty.

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데이터시트(PDF) – STMicroelectronics

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Addendum-Page 3 Texas Instruments www. All linear dimensions are in inches millimeters. This drawing is subject to change without notice. This package is hermetically sealed with a ceramic lid using datashedt frit. Index point is provided on cap for terminal identification only on press ceramic glass frit seal only. This package can be hermetically sealed with a metal lid.

The terminals are gold plated. Dattasheet linear dimensions are in millimeters. Body dimensions do not include mold flash or protrusion, not to exceed 0, This package can be hermetically sealed with a ceramic lid using glass frit.

Index point satasheet provided on cop for dayasheet identification only. All linear dimensions ore in inches millimeters. Mold flash, protrusions, or gate burrs shall not exceed. Interlead flosh shall not exceed. Refer to IPC for alternate board design. Laser cutting apertures with trapezoidal walls and also rounding corners will offer better paste release.

Customers should contact their board assembly site for stencil design recommendations.

(PDF) 74192 Datasheet download

Refer to IPC E. Customers should contact their board fabrication site for solder mask tolerances between and around signal pods. Reproduction of Tl information in Tl data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties, conditions, limitations, and notices. Information of third parties may be subject to additional restrictions.