TLC551, TLC551Y

LinCMOS

™ TIMERS

SLFS044B – FEBRUARY 1984 – REVISED SEPTEMBER 1997

9

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

electrical characteristics at VDD = 5 V, TA = 25°C

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VIT

Threshold voltage

2.8

3.3

3.8

V

IIT

Threshold current

10

pA

VI(TRIG)

Trigger voltage

1.36

1.66

1.96

V

II(TRIG)

Trigger current

10

pA

VI(RESET)

Reset voltage

0.4

1.1

1.5

V

II(RESET)

Reset current

10

pA

Control voltage (open circuit) as a percentage of supply voltage

66.7%

Discharge switch on-state voltage

IOL = 10 mA

0.14

0.5

V

Discharge switch off-state current

0.1

nA

VOH

High-level output voltage

IOH = – 1 mA

4.1

4.8

V

IOL = 8 mA

0.21

0.4

VOL

Low-level output voltage

IOL = 5 mA

0.13

0.3

V

IOL = 3.2 mA

0.08

0.3

IDD

Supply current

See Note 2

170

350

µA

NOTE 2: These values apply for the expected operating configurations in which THRES is connected directly to DISCH or to TRIG.

TYPICAL CHARACTERISTICS

Figure 1

2

1

025

75

DISCHARGE SWITCH ON-STATE RESISTANCE

vs

FREE-AIR TEMPERATURE

50

100

10

4

20

100

40

7

70

TA – Free-Air Temperature – °C

VDD = 2 V, IO = 1 mA

VDD = 5 V, IO = 10 mA

VDD = 15 V, IO = 100 mA

Figure 2

100

0

0

2

4

6

8

12

16

PROPAGATION DELAY TIMES (TO DISCHARGE

OUTPUT FROM TRIGGER AND THRESHOLD

SHORTED TOGETHER)

vs

SUPPLY VOLTAGE

10

14

400

200

500

600

300

VDD – Supply Voltage – V

20

18

tPLH‡

tPHL

IO(on) ≥ 1 mA

CL ≈ 0

TA = 25°C

‡ The effects of the load resistance on these values must be

taken into account separately.