Használati útmutató Texas Instruments SN74LV8153N

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SCLS555 − JUNE 2004

DESCRIPTION

The SN74LV8153 is a serial-to-parallel data converter. It

accepts serial input data and outputs 8-bit parallel data.

The automatic data-rate detection feature of the

SN74LV8153 eliminates the need for an external oscillator

and helps with cost and board real-estate savings.

The OUTSEL pin is used to choose between open

collector and push-pull outputs. The open-collector option

is suitable when this device is used in applications such as

LED interface, where high drive current is required. SOUT

is the output that acknowledges reception of the serial

data.

To ensure the high-impedance state during power up or

power down, OE should be tied to VCC1 through a pullup

resistor; the minimum value of the resistor is determined

by the current-sinking capability of the driver.

N OR PW PACKAGE

(TOP VIEW)

VCC1

A0

A1

A2

D

OUTSEL

RESET

OE

SOUT

GND

VCC2

Y0

Y1

Y2

Y3

Y4

Y5

Y6

Y7

GND

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

FEATURES

DSingle-Wire Serial Data Input

DCompatible With UART Serial-Data Format

DUp to Eight Devices (64-Bit Parallel) Can

Share the Same Bus by Using Dierent

Combinations of A0, A1, A2

DUp to 40 mA Current Drive in Open-Collector

Mode for Driving LEDs

DOutputs Can be Congured as

Open-Collector or Push-Pull

DInternal Oscillator and Counter for

Automatic Data-Rate Detection

DOutput Levels Are Referenced to VCC2 and

Can Be Congured From 3 V to 12 V

DLatch-Up Performance Exceeds 250 mA Per

JESD 17

DESD Protection Exceeds JESD 22

− 2000-V Human-Body Model (A114-A)

− 1000-V Charged-Device Model (C101)

SUMMARY OF RECOMMENDED

OPERATING CONDITIONS

PARAMETER

VCC1 3 V to 5.5 V

VCC2 3 V to 13.2 V

IOL 40 mA @ VCC2 = 4.5 V

(open-collector mode)

IOH −24 mA @ VCC2 = 12 V

(push-pull mode)

Maximum Data Rate24 Kbps

FUNCTION TABLE

(each buffer)

INPUTS

OUTPUT

OUTPUT

OUTSEL RESETOEDn

OUTPUT

Yn

OUTPUT

STRUCTURE

LHL HL

LHL LH

Open collector

LXH XH

Open collector

LLX XH

HHL HH

HHL LL

Push pull

HXH XZ

Push-pull

HLL XL

In the open-collector mode (OUTSEL = L), the outputs are inverted,

e.g., Y1 = l, when D1 = H

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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.

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Copyright  2004, Texas Instruments Incorporated

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