Integrated Circuits (ICs) > Logic ICs > Counters > SN74AS169AD

SN74AS169AD

Texas Instruments

Part Number:	SN74AS169AD
Manufacturer:	Texas Instruments
Part Type:	Integrated Circuits (ICs) > Logic ICs > Counters > SN74AS169AD
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Description:	Counter Single 4-Bit Sync Binary UP/Down 16-Pin PDIP

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Counter Single 4-Bit Sync Binary UP/Down 16-Pin PDIP

Specifications

TYPE	DESCRIPTION
Case/Package	SOIC
Mount	Surface Mount
Number of Pins	16
Clock Edge Trigger Type	Positive Edge
Frequency	75 MHz
Logic Function	Counter
Max Operating Temperature	70 °C
Min Operating Temperature	0 °C
Number of Bits	4
Number of Bits per Element	4
Number of Elements	1
Operating Supply Voltage	5.5 V
Sync/Async	Synchronous

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Documentation for Texas Instruments SN74AS169AD

Datasheet	View & Download SN74AS169AD Datasheet
Datasheet	View & Download SN74AS169AD Datasheet
Datasheet	View & Download SN74AS169AD Datasheet

Alternate Descriptions

Descriptions of Texas Instruments SN74AS169AD provided by its distributors.
Counter Single 4-Bit Sync Binary UP/Down 16-Pin PDIP
LOGIC, SYNC UP/DN BIN CNTR, 16SOIC; Logic IC Function:4-Bit Synchronous Up-Down Binary Presettable Counter; Logic IC Family:AS; Logic IC Base Number:74169; Max Clock Frequency:75MHz; Max Count:16; Min Supply Voltage:4.5V; Max Supply Voltage:5.5V; Case Style:SOIC; Operating Temperature Range:0°C to +70°C; No. of Pins:16; Termination Type:SMD
These synchronous 4-bit up/down binary presettable counters feature an internal carry look-ahead circuitry for cascading in high-speed counting applications. Synchronous operation is provided by having all flip-flops clocked simultaneously so that the outputs change coincident with each other when so instructed by the count-enable (, ) inputs and internal gating. This mode of operation eliminates the output counting spikes normally associated with asynchronous (ripple-clock) counters. A buffered clock (CLK) input triggers the four flip-flops on the rising (positive-going) edge of the clock waveform. These counters are fully programmable; that is, they may be preset to either level. The load-input circuitry allows loading with the carry-enable output of cascaded counters. Because loading is synchronous, setting up a low level at the load (LOAD\) input disables the counter and causes the outputs to agree with the data inputs after the next clock pulse. The internal carry look-ahead circuitry provides for cascading counters for n-bit synchronous application without additional gating. and inputs and a ripple-carry output () are instrumental in accomplishing this function. Both and must be low to count. The direction of the count is determined by the level of the up/down (U/D\) input. When U/D\ is high, the counter counts up; when low, it counts down. is fed forward to enable . , thus enabled, produces a low-level pulse while the count is zero (all inputs low) counting down or maximum (15) counting up. This low-level overflow ripple-carry pulse can be used to enable successive cascaded stages. Transitions at or are allowed regardless of the level of the clock input. All inputs are diode clamped to minimize transmission-line effects, thereby simplifying system design. These counters feature a fully independent clock circuit. Changes at control inputs (, , , or U/D\) that modify the operating mode have no effect on the contents of the counter until clocking occurs. The function of the counter (whether enabled, disabled, loading, or counting) is dictated solely by the conditions meeting the stable setup and hold times. The SN54ALS169B and SN54AS169A are characterized for operation over the full military temperature range of -55°C to 125°C. The SN74ALS169B and SN74AS169A are characterized for operation from 0°C to 70°C.

SN74AS169AD

Texas Instruments

Specifications

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Documentation for Texas Instruments SN74AS169AD

Alternate Descriptions

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