Symbol

Parameter

From (Input)

Conditions

Min

Max

Units

To (Output)

Propagation Delay Time

A1 A2

70

ns

Low to High Level Output

to Q

Propagation Delay Time

B to

55

ns

Low to High Level Output

Q

Propagation Delay Time

A1 A2

80

ns

High to Low Level Output

to Q

Propagation Delay Time

B

65

ns

High to Low Level Output

to Q

Output Pulse

A1 A2 or B

Width Using the

to Q Q

70

150

ns

Internal Timing Resistor

Output Pulse

A1 A2

Width Using Zero

to Q Q

50

ns

Timing Capacitance

Output Pulse

A1 A2

Width Using External

to Q Q

600

800

ns

Timing Resistor

A1 A2

to Q Q

68ms

Operating Rules

sary value For small time constants use high-quality

mica glass polypropylene polycarbonate or polystyrene

capacitors For large time constants use solid tantalum or

special aluminum capacitors If the timing capacitors

have leakages approaching 100 nA or if stray capaci-

tance from either terminal to ground is greater than 50 pF

the timing equations may not represent the pulse width

the device generates

3 The pulse width is essentially determined by external tim-

K

07

TLF6538 – 2

FIGURE 1

required for standard TTL one-shots to prevent high in-

verse leakage current

(Figure 2)

TLF6538 – 3

FIGURE 2

3