SN74AS194

Name: SN74AS194
Brand: TI
SKU: SN74AS194
Price: 1.739 USD

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4-Bit Bidirectional Universal Shift Registers

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Data sheet

document-pdfAcrobat 4-Bit Bidirectional Universal Shift Registers datasheet (Rev. A)

SN74AS194

ACTIVE

Data sheet

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Product details

Configuration

Universal

Bits (#)

4

Technology family

AS

Supply voltage (min) (V)

4.5

Supply voltage (max) (V)

5.5

Input type

Bipolar

Output type

Push-Pull

Clock frequency (MHz)

80

IOL (max) (mA)

20

IOH (max) (mA)

-2

Supply current (max) (µA)

53000

Features

Very high speed (tpd 5-10ns)

Operating temperature range (°C)

0 to 70

Rating

Catalog

Configuration

Universal

Bits (#)

4

Technology family

AS

Supply voltage (min) (V)

4.5

Supply voltage (max) (V)

5.5

Input type

Bipolar

Output type

Push-Pull

Clock frequency (MHz)

80

IOL (max) (mA)

20

IOH (max) (mA)

-2

Supply current (max) (µA)

53000

Features

Very high speed (tpd 5-10ns)

Operating temperature range (°C)

0 to 70

Rating

Catalog

SOIC (D)

16

59.4 mm² 9.9 x 6

Parallel-to-Serial, Serial-to-Parallel Conversions
Left or Right Shifts
Parallel Synchronous Loading
Direct Overriding Clear
Temporary Data-Latching Capability
Package Options Include Plastic Small-Outline Packages (D), Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs

Parallel-to-Serial, Serial-to-Parallel Conversions
Left or Right Shifts
Parallel Synchronous Loading
Direct Overriding Clear
Temporary Data-Latching Capability
Package Options Include Plastic Small-Outline Packages (D), Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs

These 4-bit bidirectional universal shift registers feature parallel outputs, right-shift and left-shift serial (SR SER, SL SER) inputs, operating-mode-control (S0, S1) inputs, and a direct overriding clear (CLR\) line. The registers have four distinct modes of operation:

Inhibit clock (temporary data latch/do nothing)
Shift right (in the direction Q_A toward Q_D)
Shift left (in the direction Q_D toward Q_A)
Parallel (broadside) load

Parallel synchronous loading is accomplished by applying the four bits of data and taking both S0 and S1 high. The data is loaded into the associated flip-flops and appears at the outputs after the positive transition of the clock (CLK) input. During loading, serial data flow is inhibited.

Shift right is accomplished synchronously with the rising edge of the clock pulse when S0 is high and S1 is low. Serial data for this mode is entered at the shift-right data input. When S0 is low and S1 is high, data shifts left synchronously and new data is entered at the shift-left serial inputs. Clocking of the flip-flop is inhibited when both mode-control inputs are low.

The SN54AS194 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74AS194 is characterized for operation from 0°C to 70°C.

These 4-bit bidirectional universal shift registers feature parallel outputs, right-shift and left-shift serial (SR SER, SL SER) inputs, operating-mode-control (S0, S1) inputs, and a direct overriding clear (CLR\) line. The registers have four distinct modes of operation:

Inhibit clock (temporary data latch/do nothing)
Shift right (in the direction Q_A toward Q_D)
Shift left (in the direction Q_D toward Q_A)
Parallel (broadside) load

Parallel synchronous loading is accomplished by applying the four bits of data and taking both S0 and S1 high. The data is loaded into the associated flip-flops and appears at the outputs after the positive transition of the clock (CLK) input. During loading, serial data flow is inhibited.

Shift right is accomplished synchronously with the rising edge of the clock pulse when S0 is high and S1 is low. Serial data for this mode is entered at the shift-right data input. When S0 is low and S1 is high, data shifts left synchronously and new data is entered at the shift-left serial inputs. Clocking of the flip-flop is inhibited when both mode-control inputs are low.

The SN54AS194 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74AS194 is characterized for operation from 0°C to 70°C.

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