HEF4521BT NXP Semiconductors, HEF4521BT Datasheet - Page 5

• Manufacturer Part Number: HEF4521BT
• Description: IC, 4000 LOCMOS, SMD, 4521, SOIC16
• Manufacturer: NXP Semiconductors

Specifications of HEF4521BT

• Clock Frequency: 35MHz
• Count Maximum: 24
• Supply Voltage Range: 4.5V To 15.5V
• Logic Case Style: SOIC
• No. Of Pins: 16
• Operating Temperature Range: -40°C To +70°C
• Svhc: No SVHC (18-Jun-2010)
• Package /: RoHS Compliant
• Base Number: 4521
• Rohs Compliant: Yes

Philips Semiconductors
AC CHARACTERISTICS
V
January 1995
Propagation delays
SS
24-stage frequency divider and oscillator
I
O
MR
I
2
1
= 0 V; T
n
HIGH to LOW
LOW to HIGH
HIGH to LOW
LOW to HIGH
HIGH to LOW
HIGH to LOW
LOW to HIGH
O
O
O
18
1
O
n
n
amb
1
= 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
5
5
5
5
5
5
5
Fig.4 Schematic diagram of clock input circuitry.
t
t
t
t
t
t
t
PHL
PLH
PHL
PLH
PHL
PHL
PLH
SYMBOL
MIN.
5
20 ns
TYP.
950
350
220
950
350
220
120
10
40
10
40
90
25
60
20
40
15
15
55
35
30
MAX.
1900
1900
700
440
700
440
240
180
120
110
80
30
20
80
30
20
80
70
50
60
40
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
923 ns
339 ns
212 ns
923 ns
339 ns
212 ns
13 ns
13 ns
93 ns
44 ns
32 ns
63 ns
24 ns
17 ns
33 ns
19 ns
12 ns
4 ns
2 ns
4 ns
2 ns
EXTRAPOLATION
FORMULA
Product specification
TYPICAL
HEF4521B
(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
(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
MSI
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L