hef4541b NXP Semiconductors, hef4541b Datasheet - Page 8

• Manufacturer Part Number: hef4541b
• Description: Programmable Timer
• Manufacturer: NXP Semiconductors

Philips Semiconductors
AC CHARACTERISTICS
V
January 1995
Propagation delays
Minimum clock
Minimum reset
Maximum clock
Oscillator frequency
Oscillator frequency
SS
Programmable timer
RS
2
RS
2
RS
2
RS
2
pulse width; LOW
pulse width; HIGH
pulse frequency
= 0 V; T
8
10
13
16
selected
HIGH to LOW
LOW to HIGH
HIGH to LOW
LOW to HIGH
HIGH to LOW
LOW to HIGH
HIGH to LOW
LOW to HIGH
selected
selected
selected
O
O
O
O
amb
= 25 C; C
L
= 50 pF; input transition times
V
V
DD
10
15
10
15
10
15
10
15
10
15
10
15
10
15
10
15
10
15
5
5
5
5
5
5
5
5
5
t
t
t
t
t
t
t
t
t
t
f
f
f
SYMBOL MIN.
PHL
PLH
PHL
PLH
PHL
PLH
PHL
PLH
WRSL
WMRH
max
osc
osc
;
;
;
;
60
30
24
60
30
24
15
18
8
TYP. MAX.
8
375
150
425
165
120
510
190
135
575
210
150
110
20 ns
30
15
12
30
15
12
16
30
36
90
90
90
8
8
8
1020 ns
1150 ns
750 ns
300 ns
220 ns
850 ns
330 ns
240 ns
380 ns
270 ns
420 ns
300 ns
ns
ns
ns
ns
ns
ns
MHz
MHz
MHz
kHz
kHz
kHz
kHz
kHz
kHz
348 ns
139 ns
102 ns
398 ns
154 ns
483 ns
179 ns
127 ns
548 ns
199 ns
142 ns
112 ns
R
C
R
R
C
R
t
t
S
t
t
S
TYPICAL EXTRAPOLATION
= 5 k
= 1 nF
= 56 k
= 1 nF
= 10 k
= 120 k
(0,55 ns/pF) C
(0,23 ns/pF) C
(0,16 ns/pF) C
(0,55 ns/pF) C
(0,23 ns/pF) C
(0,16 ns/pF) C
(0,55 ns/pF) C
(0,23 ns/pF) C
(0,16 ns/pF) C
(0,55 ns/pF) C
(0,23 ns/pF) C
(0,16 ns/pF) C
FORMULA
Product specification
HEF4541B
L
L
L
L
L
L
L
L
L
L
L
L
MSI