SN54AHCT595, SN74AHCT595

8BIT SHIFT REGISTERS

WITH 3STATE OUTPUT REGISTERS

SCLS374L − MAY 1997 − REVISED FEBRUARY 2004

6

POST OFFICE BOX 655303

electrical characteristics over recommended operating free-air temperature range (unless

otherwise noted)

PARAMETER

TEST CONDITIONS

VCC

TA = 25°C

SN54AHCT595

SN74AHCT595

UNIT

PARAMETER

TEST CONDITIONS

VCC

MIN

TYP

MAX

MIN

MAX

MIN

MAX

UNIT

VOH

IOH = −50 mA

4.5 V

4.4

4.5

4.4

4.4

V

VOH

IOH = −8 mA

4.5 V

3.94

3.8

3.8

V

VOL

IOL = 50 mA

4.5 V

0.1

0.1

0.1

V

VOL

IOL = 8 mA

4.5 V

0.36

0.44

0.44

V

II

VI = 5.5 V or GND

0 V to 5.5 V

±0.1

±1*

±1

mA

IOZ

VO = VCC or GND,

QA−QH

5.5 V

±0.25

±2.5

±2.5

mA

ICC

VI = VCC or GND,

IO = 0

5.5 V

4

40

40

mA

∆ICC†

One input at 3.4V,

Other inputs at VCC or GND

5.5 V

2

2.2

2.2

mA

Ci

VI = VCC or GND

5 V

3

10

10

pF

Co

VO = VCC or GND

5 V

5.5

pF

* On products compliant to MIL-PRF-38535, this parameter is not production tested at VCC = 0 V.

† This is the increase in supply current for each input at one of the specified TTL voltage levels, rather than 0 V or VCC.

(unless otherwise noted) (see Figure 1)

TA = 25°C

SN54AHCT595

SN74AHCT595

UNIT

MIN

MAX

MIN

MAX

MIN

MAX

UNIT

SRCLK high or low

5

5.5

5.5

tw

Pulse duration

RCLK high or low

5

5.5

5.5

ns

tw

Pulse duration

SRCLR low

5

5

5

ns

SER before SRCLK

↑

3

3

3

tsu

Setup time

SRCLK

↑ before RCLK↑‡

5

5

5

ns

tsu

Setup time

SRCLR low before RCLK

↑

5

5

5

ns

SRCLR high (inactive) before SRCLK

↑

3.4

3.8

3.8

th

Hold time

SER after SRCLK

↑

2

2

2

ns

‡ This setup time allows the storage register to receive stable data from the shift register. The clocks can be tied together, in which case the shift

register is one clock pulse ahead of the storage register.

PRODUCT PREVIEW information concerns products in the formative or

design phase of development. Characteristic data and other

specifications are design goals. Texas Instruments reserves the right to

change or discontinue these products without notice.