SN74LVC1G175

GND

D

CLK

Q

Serial

Input Data

Clock

Pulse

SN74LVC1G175

GND

D

CLK

Q

SN74LVC1G175

GND

D

CLK

Q

SN74LVC1G175

GND

D

CLK

Q

Serial

Output Dat a

A

B

C

D

SN74LVC1G175

www.ti.com

SCES560G – MARCH 2004 – REVISED JUNE 2015

9 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

9.1 Application Information

Multiple SN74LVC1G175 devices can be used in tandem to create a shift register of arbitrary length. In this

example, we use four SN74LVC1G175 devices to form a 4-bit serial shift register. By connecting all CLK inputs

to a common clock pulse and tying each output of one device to the next, we can store and load 4-bit values on

demand. We demonstrate loading the 4 bit value 1101 into memory by setting Serial Input Data to each desired

memory bit, and by sending a clock pulse for each bit, we sequentially move all stored bits from left to right

(A

→ B → C → D)

9.2 Typical Application

Figure 4. 4-Bit Serial Shift Register

Table 2. Stored Data Values

Serial Input Data

Stored A

Stored B

Stored C

Stored D

1

0

0

0

0

0

1

0

0

0

1

0

1

0

0

1

1

0

1

0

0

1

1

0

1

9.2.1 Design Requirements

The SN74LVC1G175 device uses CMOS technology and has balanced output drive. Care must be taken to

avoid bus contention because it can drive currents that would exceed maximum limits.

The SN74LVC1G175 allows storing digital signals with a digital control signal. All input signals should remain as

9.2.2 Detailed Design Procedure

1. Recommended input conditions:

–

For rise time and fall time specifications, see

Δt/Δv in the table.

–

–

2. Recommended output conditions:

–

Load currents should not exceed ±50 mA.

Copyright © 2004–2015, Texas Instruments Incorporated

Submit Documentation Feedback

11

Product Folder Links: SN74LVC1G175