TPIC6596

POWER LOGIC 8-BIT SHIFT REGISTER

SLIS096 – APRIL 2000

1

POST OFFICE BOX 655303

250-mA Continuous Current

description

The TPIC6596 is a monolithic, high-voltage, high-

current power 8-bit shift register designed for use

in systems that require relatively high load power.

The device contains a built-in voltage clamp on

the outputs for inductive transient protection.

Power driver applications include relays, sole-

noids, and other medium-current or high-voltage

loads.

This device contains an 8-bit serial-in, parallel-out

shift register that feeds an 8-bit D-type storage

register. Data transfers through both the shift and

storage registers on the rising edge of the

shift-register clock (SRCK) and the register clock

(RCK) respectively. The storage register transfers

data to the output buffer when shift-register clear

(SRCLR) is high. When SRCLR is low, all

registers in the device are cleared. When output

enable (G) is held high, all data in the output

buffers is held low and all drain outputs are off.

When G is held low, data from the storage register

is transparent to the output buffers. The serial

output (SER OUT) is clocked out of the device on

the falling edge of SRCK to provide additional hold time for cascaded applications. This will provide improved

performance for applications where clock signals may be skewed, devices are not located near one another,

or the system must tolerate electromagnetic interference.

Outputs are low-side, open-drain DMOS transistors with output ratings of 45 V and 250-mA continuous sink

current capability. When data in the output buffers is low, the DMOS-transistor outputs are off. When data is

high, the DMOS-transistor outputs have sink current capability.

Separate power and logic level ground pins are provided to facilitate maximum system flexibility. Pins 1, 10, 11,

and 20 are internally connected, and each pin must be externally connected to the power system ground in order

to minimize parasitic inductance. A single-point connection between pin 19, logic ground (LGND), and pins 1,

10, 11, and 20, power grounds (PGND), must be externally made in a manner that reduces crosstalk between

the logic and load circuits.

The TPIC6596 is characterized for operation over the operating case temperature range of – 40

°C to 125°C.

Copyright

© 2000, Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

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.

† This symbol is in accordance with ANSI/IEEE Std 91-1984

and IEC Publication 617-12.

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2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

PGND

SER IN

DRAIN0

DRAIN1

DRAIN2

DRAIN3

SRCLR

G

PGND

PGND

LGND

SER OUT

DRAIN7

DRAIN6

DRAIN5

DRAIN4

SRCK

RCK

PGND

DW OR N PACKAGE

(TOP VIEW)

2

SRG8

9

12

8

13

3

EN3

C2

R

C1

1D

G

RCK

SRCLR

SRCK

SER IN

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6

5

14

7

16

15

18

17

DRAIN0

DRAIN1

DRAIN2

DRAIN3

DRAIN4

DRAIN5

DRAIN6

DRAIN7

SER OUT

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