HEF4521BT [NEXPERIA]

24-stage frequency divider and oscillatorProduction;
HEF4521BT
型号: HEF4521BT
厂家: Nexperia    Nexperia
描述:

24-stage frequency divider and oscillatorProduction

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HEF4521B  
24-stage frequency divider and oscillator  
Rev. 8 — 3 December 2021  
Product data sheet  
1. General description  
The HEF4521B consists of a chain of 24 toggle flip-flops with an overriding asynchronous master  
reset input (MR), and an input circuit that allows three modes of operation. The single inverting  
stage (A2 to Y2) functions as: a crystal oscillator, an input buffer for an external oscillator or in  
combination with A1 as an RC oscillator. The crystal oscillator operates in Low-power mode when  
pins VSS1 and VDD1 are supplied via external resistors.  
Each flip-flop divides the frequency of the previous flip-flop by two, consequently the HEF4521B  
counts up to 224 = 16777216. The counting advances on the HIGH-to-LOW transition of the  
clock (A2). The outputs from each of the last seven stages (218 to 224) are available for additional  
flexibility.  
It operates over a recommended VDD power supply range of 3 V to 15 V referenced to VSS (usually  
ground). Unused inputs must be connected to VDD, VSS, or another input.  
2. Features and benefits  
Wide supply voltage range from 3.0 V to 15.0 V  
CMOS low power dissipation  
High noise immunity  
Low power crystal oscillator operation  
Fully static operation  
5 V, 10 V, and 15 V parametric ratings  
Standardized symmetrical output characteristics  
Complies with JEDEC standard JESD 13-B  
ESD protection:  
HBM JESD22-A114F exceeds 2000 V  
MM JESD22-A115-A exceeds 200 V  
Specified from -40 °C to +85 °C  
3. Ordering information  
Table 1. Ordering information  
Type number  
Package  
Temperature range Name  
Description  
Version  
HEF4521BT  
-40 °C to +85 °C  
SO16  
plastic small outline package; 16 leads;  
body width 3.9 mm  
SOT109-1  
 
 
 
Nexperia  
HEF4521B  
24-stage frequency divider and oscillator  
4. Functional diagram  
5
4
2
9
V
Y2  
MR  
A1  
DD1  
A2  
6
3
CP  
STAGES 1 to 8  
Q8  
C
D
V
SS1  
CP  
STAGES 9 to 16  
Q16  
C
D
CP  
STAGES 17 to 24  
C
D
Q24 Q18 Q19 Q20 Q21 Q22 Q23  
10 11 12 13 14 15  
Y1  
1
7
001aae708  
Fig. 1. Functional diagram  
V
DD1  
A2  
V
DD  
to FFs  
to logic  
V
SS  
V
SS1  
Y2  
001aae711  
Fig. 2. Schematic diagram of clock input circuitry  
©
HEF4521B  
All information provided in this document is subject to legal disclaimers.  
Nexperia B.V. 2021. All rights reserved  
Product data sheet  
Rev. 8 — 3 December 2021  
2 / 15  
 
Nexperia  
HEF4521B  
24-stage frequency divider and oscillator  
MR  
A1  
Y2  
Q
Q
Q
Q
Q
Q
Q
Q
FF 1  
FF 2  
FF 3  
FF 4  
FF 5  
FF 6  
FF 7  
FF 8  
A2  
T
T
T
T
T
T
T
T
V
SS1  
CD  
CD  
CD  
CD  
CD  
CD  
CD  
CD  
V
DD1  
Q
Q
Q
Q
Q
Q
Q
Q
FF 9  
T
FF 10  
T
FF 11  
T
FF 12  
T
FF 13  
T
FF 14  
T
FF 15  
T
FF 16  
T
CD  
CD  
CD  
CD  
CD  
CD  
CD  
CD  
Q
FF 17  
T
Q
FF 18  
T
Q
FF 19  
T
Q
FF 20  
T
Q
FF 21  
T
Q
FF 22  
T
Q
FF 23  
T
Q
FF 24  
T
CD  
CD  
CD  
CD  
CD  
CD  
CD  
CD  
Q24  
Q18  
Q19  
Q20  
Q21  
Q22  
Q23  
Y1  
001aae710  
Fig. 3. Logic diagram  
©
HEF4521B  
All information provided in this document is subject to legal disclaimers.  
Nexperia B.V. 2021. All rights reserved  
Product data sheet  
Rev. 8 — 3 December 2021  
3 / 15  
Nexperia  
HEF4521B  
24-stage frequency divider and oscillator  
5. Pinning information  
5.1. Pinning  
HEF4521B  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
12  
11  
10  
9
Q24  
MR  
V
DD  
Q23  
Q22  
Q21  
Q20  
Q19  
Q18  
A1  
VSS1  
Y2  
VDD1  
A2  
Y1  
V
SS  
001aae709  
Fig. 4. Pin configuration for SOT109-1 (SO16)  
5.2. Pin description  
Table 2. Pin description  
Symbol  
Pin  
2
Description  
MR  
master reset input  
ground supply voltage 1  
supply voltage 1  
VSS1  
3
VDD1  
5
Y1, Y2  
7, 4  
8
external oscillator connection  
ground supply voltage  
external oscillator connection  
output  
VSS  
A1, A2  
9, 6  
Q18, Q19, Q20, Q21, Q22, Q23, Q24  
VDD  
10, 11, 12, 13, 14, 15, 1  
16  
supply voltage  
6. Count capacity  
Table 3. Count capacity  
Output  
Count capacity  
218 = 262144  
219 = 524288  
220 = 1048576  
221 = 2097152  
222 = 4194304  
223 = 8388608  
224 = 16777216  
Q18  
Q19  
Q20  
Q21  
Q22  
Q23  
Q24  
©
HEF4521B  
All information provided in this document is subject to legal disclaimers.  
Nexperia B.V. 2021. All rights reserved  
Product data sheet  
Rev. 8 — 3 December 2021  
4 / 15  
 
 
 
 
Nexperia  
HEF4521B  
24-stage frequency divider and oscillator  
7. Functional test  
A test function has been included to reduce the test time required to test all 24 counter stages. This  
test function divides the counter into three 8-stage sections by connecting VSS1 to VDD and VDD1 to  
VSS. 255 counts are loaded into each of the 8-stage sections in parallel via A2 (connected to Y2).  
All flip-flops are now at a HIGH level. The counter is now returned to the normal 24-stage in series  
configuration by connecting VSS1 to VSS and VDD1 to VDD. Entering one more pulse into input A2  
causes the counter to ripple from an all HIGH state to an all LOW state.  
Table 4. Functional test sequence  
H = HIGH voltage level; L = LOW voltage level; ↓ = HIGH to LOW transition.  
Inputs  
MR  
Control terminals  
Outputs  
Q18 to Q24  
L
Remarks  
A2  
Y2  
VSS1  
VDD1  
H
L
L
VDD  
VSS  
Counter is in three 8-stage sections in parallel mode; A2 and Y2  
are interconnected (Y2 is now input); counter is reset by MR.  
L
L
L
L
[1]  
L
[1]  
L
VDD  
VSS  
VSS  
VSS  
VSS  
VSS  
VSS  
VDD  
H
H
H
H
VSS1 is connected to VSS  
.
H
H
L
The input A2 is made HIGH.  
L
VDD1 is connected to VDD; Y2 is now made floating and  
becomes an output; the device is now in the 224 mode.  
L
VSS  
VDD  
L
Counter ripples from an all HIGH state to an all LOW state.  
[1] 255 pulses are clocked into A2, Y2. The counter advances on the LOW to HIGH transition.  
8. Limiting values  
Table 5. Limiting values  
In accordance with the Absolute Maximum Rating System (IEC 60134).  
Symbol  
VDD  
IIK  
Parameter  
Conditions  
Min  
Max  
+18  
Unit  
V
supply voltage  
-0.5  
input clamping current  
input voltage  
VI < -0.5 V or VI > VDD + 0.5 V  
VO < -0.5 V or VO > VDD + 0.5 V  
to any supply terminal  
-
±10  
mA  
V
VI  
-0.5  
VDD + 0.5  
±10  
IOK  
output clamping current  
input/output current  
supply current  
-
mA  
mA  
mA  
°C  
II/O  
-
-
±10  
IDD  
±100  
+150  
+85  
Tstg  
Tamb  
Ptot  
P
storage temperature  
ambient temperature  
total power dissipation  
power dissipation  
-65  
-40  
-
°C  
Tamb -40 °C to +85 °C  
per output  
500  
mW  
mW  
-
100  
©
HEF4521B  
All information provided in this document is subject to legal disclaimers.  
Nexperia B.V. 2021. All rights reserved  
Product data sheet  
Rev. 8 — 3 December 2021  
5 / 15  
 
 
 
 
Nexperia  
HEF4521B  
24-stage frequency divider and oscillator  
9. Recommended operating conditions  
Table 6. Recommended operating conditions  
Symbol  
VDD  
Parameter  
Conditions  
Min  
Typ  
Max  
15  
Unit  
V
supply voltage  
3
0
-
-
-
-
-
-
VI  
input voltage  
VDD  
+85  
3.75  
0.5  
V
Tamb  
Δt/ΔV  
ambient temperature  
input transition rise and fall rate  
in free air  
-40  
-
°C  
VDD = 5 V  
VDD = 10 V  
VDD = 15 V  
μs/V  
μs/V  
μs/V  
-
-
0.08  
10. Static characteristics  
Table 7. Static characteristics  
VSS = 0 V; VI = VSS or VDD unless otherwise specified.  
Symbol Parameter Conditions  
VDD  
Tamb = -40 °C Tamb = +25 °C Tamb = +85 °C Unit  
Min  
Max  
-
Min  
Max  
-
Min  
Max  
VIH  
HIGH-level input voltage |IO| < 1 μA  
5 V  
3.5  
3.5  
3.5  
-
-
V
V
V
V
V
V
V
V
V
V
V
V
10 V  
15 V  
5 V  
7.0  
-
7.0  
-
7.0  
11.0  
-
11.0  
-
11.0  
-
VIL  
LOW-level input voltage  
|IO| < 1 μA  
-
1.5  
3.0  
4.0  
-
-
1.5  
3.0  
4.0  
-
-
1.5  
3.0  
4.0  
-
10 V  
15 V  
5 V  
-
-
-
-
-
-
VOH  
VOL  
IOH  
HIGH-level output voltage |IO| < 1 μA  
LOW-level output voltage |IO| < 1 μA  
4.95  
4.95  
4.95  
10 V  
15 V  
5 V  
9.95  
-
9.95  
-
9.95  
-
14.95  
-
14.95  
-
14.95  
-
-
0.05  
0.05  
0.05  
-1.7  
-0.52  
-1.3  
-3.6  
-
-
0.05  
0.05  
0.05  
-1.4  
-0.44  
-1.1  
-3.0  
-
-
0.05  
0.05  
0.05  
10 V  
15 V  
5 V  
-
-
-
-
-
-
HIGH-level output current VO = 2.5 V  
VO = 4.6 V  
-
-
-
-1.1 mA  
-0.36 mA  
-0.9 mA  
-2.4 mA  
5 V  
-
-
-
VO = 9.5 V  
10 V  
15 V  
5 V  
-
-
-
VO = 13.5 V  
-
-
-
IOL  
LOW-level output current VO = 0.4 V  
VO = 0.5 V  
0.52  
0.44  
0.36  
-
-
-
mA  
mA  
mA  
10 V  
15 V  
15 V  
5 V  
1.3  
-
1.1  
-
0.9  
VO = 1.5 V  
3.6  
-
3.0  
-
2.4  
II  
input leakage current  
-
-
-
-
-
±0.3  
20  
40  
80  
-
-
-
-
-
-
±0.3  
20  
40  
80  
7.5  
-
-
-
-
-
±1.0 μA  
150 μA  
300 μA  
600 μA  
IDD  
supply current  
IO = 0 A  
10 V  
15 V  
-
CI  
input capacitance  
-
pF  
©
HEF4521B  
All information provided in this document is subject to legal disclaimers.  
Nexperia B.V. 2021. All rights reserved  
Product data sheet  
Rev. 8 — 3 December 2021  
6 / 15  
 
 
 
Nexperia  
HEF4521B  
24-stage frequency divider and oscillator  
11. Dynamic characteristics  
Table 8. Dynamic characteristics  
VSS = 0 V; Tamb = 25 °C unless otherwise specified; for test circuit see Fig. 6.  
Symbol Parameter  
Conditions  
VDD  
5 V  
Extrapolation formula[1]  
923 ns + (0.55 ns/pF)CL  
339 ns + (0.23 ns/pF)CL  
212 ns + (0.16 ns/pF)CL  
13 ns + (0.55 ns/pF)CL  
4 ns + (0.23 ns/pF)CL  
2 ns + (0.16 ns/pF)CL  
93 ns + (0.55 ns/pF)CL  
44 ns + (0.23 ns/pF)CL  
32 ns + (0.16 ns/pF)CL  
63 ns + (0.55 ns/pF)CL  
24 ns + (0.23 ns/pF)CL  
17 ns + (0.16 ns/pF)CL  
923 ns + (0.55 ns/pF)CL  
339 ns + (0.23 ns/pF)CL  
212 ns + (0.16 ns/pF)CL  
13 ns + (0.55 ns/pF)CL  
4 ns + (0.23 ns/pF)CL  
2 ns + (0.16 ns/pF)CL  
33 ns + (0.55 ns/pF)CL  
19 ns + (0.23 ns/pF)CL  
12 ns + (0.16 ns/pF)CL  
10 ns + (1.00 ns/pF)CL  
9 ns + (0.42 ns/pF)CL  
6 ns + (0.28 ns/pF)CL  
Min  
Typ  
Max Unit  
tPHL  
HIGH to LOW  
A2 to Q18;  
see Fig. 5  
-
950 1900 ns  
propagation delay  
10 V  
15 V  
5 V  
-
350  
220  
40  
700 ns  
440 ns  
80 ns  
30 ns  
20 ns  
240 ns  
110 ns  
80 ns  
180 ns  
70 ns  
50 ns  
-
Qn to Qn + 1;  
see Fig. 5  
-
10 V  
15 V  
5 V  
-
15  
-
10  
MR to Qn  
-
-
120  
55  
10 V  
15 V  
5 V  
-
40  
A1 to Y1;  
see Fig. 5  
-
90  
10 V  
15 V  
5 V  
-
35  
-
25  
tPLH  
LOW to HIGH  
A2 to Q18;  
see Fig. 5  
-
950 1900 ns  
propagation delay  
10 V  
15 V  
5 V  
-
350  
220  
40  
15  
10  
60  
30  
20  
60  
30  
20  
40  
20  
15  
35  
20  
15  
-10  
-5  
700 ns  
440 ns  
80 ns  
30 ns  
20 ns  
120 ns  
60 ns  
40 ns  
120 ns  
60 ns  
40 ns  
-
Qn to Qn + 1;  
see Fig. 5  
-
10 V  
15 V  
5 V  
-
-
A1 to Y1;  
see Fig. 5  
-
10 V  
15 V  
5 V  
-
-
tt  
transition time  
pulse width  
Qn; see Fig. 5  
-
10 V  
15 V  
5 V  
-
-
tW  
A2 HIGH;  
minimum width;  
see Fig. 5  
80  
40  
30  
70  
40  
30  
+20  
+15  
15  
6
-
-
-
-
-
-
-
-
-
-
-
-
ns  
10 V  
15 V  
5 V  
ns  
ns  
MR HIGH;  
minimum width;  
see Fig. 5  
ns  
10 V  
15 V  
5 V  
ns  
ns  
trec  
recovery time  
MR; see Fig. 5  
ns  
10 V  
15 V  
5 V  
ns  
0
ns  
fmax  
maximum frequency A1; see Fig. 5  
12  
25  
35  
MHz  
MHz  
MHz  
10 V  
15 V  
12  
17  
[1] The typical values of the propagation delay and transition times are calculated from the extrapolation formulas shown (CL in pF).  
©
HEF4521B  
All information provided in this document is subject to legal disclaimers.  
Nexperia B.V. 2021. All rights reserved  
Product data sheet  
Rev. 8 — 3 December 2021  
7 / 15  
 
 
Nexperia  
HEF4521B  
24-stage frequency divider and oscillator  
Table 9. Dynamic power dissipation PD  
PD can be calculated from the formulas shown. VSS = 0 V; tr = tf ≤ 20 ns; Tamb = 25 °C.  
Symbol  
Parameter  
VDD  
5 V  
Typical formula for PD (μW)  
PD = 1200 × fi + Σ(fo × CL) × VDD  
PD = 5100 × fi + Σ(fo × CL) × VDD  
where:  
2
2
PD  
dynamic power  
dissipation  
fi = input frequency in MHz,  
fo = output frequency in MHz,  
CL = output load capacitance in pF,  
VDD = supply voltage in V,  
10 V  
15 V  
2
PD = 13050 × fi + Σ(fo × CL) × VDD  
Σ(CL × fo) = sum of the outputs.  
11.1. Waveforms and test circuit  
V
I
V
MR input  
M
0 V  
t
W
1/f  
max  
V
I
A2 input  
V
M
0 V  
t
t
W
rec  
t
t
PHL  
PLH  
V
OH  
90 %  
Qn output  
10 %  
V
OL  
t
t
t
t
001aae712  
a. Pulse widths, maximum frequency, recovery and transition times, and A2 to Qn propagation delays  
V
V
OH  
I
A1 input  
0 V  
V
Qn output  
V
M
M
V
OL  
t
t
t
t
PHL  
PLH  
PHL  
PLH  
V
V
OH  
OH  
Y1 output  
V
Qn + 1 output  
V
M
M
V
V
OL  
OL  
Y1 propagation delays  
Qn to Qn + 1 propagation delays  
001aak015  
b. A1 to Y1, MR to Qn, and Qn to Qn + 1 propagation delays  
Measurement points are given in Table 10.  
The logic levels VOH and VOL are typical output voltage levels that occur with the output load.  
Fig. 5. Waveforms showing measurement of dynamic characteristics  
Table 10. Measurement points  
Supply voltage  
VDD  
Input  
VM  
Output  
VM  
5 V to 15 V  
0.5VDD  
0.5VDD  
©
HEF4521B  
All information provided in this document is subject to legal disclaimers.  
Nexperia B.V. 2021. All rights reserved  
Product data sheet  
Rev. 8 — 3 December 2021  
8 / 15  
 
 
 
Nexperia  
HEF4521B  
24-stage frequency divider and oscillator  
t
W
V
I
90 %  
90 %  
negative  
pulse  
V
V
V
M
M
10 %  
10 %  
0 V  
t
t
r
f
t
t
f
r
V
I
90 %  
90 %  
positive  
pulse  
V
M
M
10 %  
10 %  
0 V  
t
W
001aaj781  
a. Input waveforms  
V
DD  
V
V
O
I
G
DUT  
C
L
R
T
001aag182  
b. Test circuit  
Test data is given in Table 11.  
Definitions for test circuit:  
CL = Load capacitance including jig and probe capacitance;  
RT = Termination resistance should be equal to output impedance Zo of the pulse generator.  
Fig. 6. Test circuit for measuring switching times  
Table 11. Test data  
Supply  
VDD  
Input  
Load  
CL  
VI  
tr, tf  
5 V to 15 V  
VSS or VDD  
≤ 20 ns  
50 pF  
12. Application information  
V
DD  
(1)  
R
R
o
1.8 MΩ  
V
V
DD1  
DD  
Y1  
Y2  
A1  
Q18  
A2  
HEF4521B  
C
S
C
T
Q24  
MR  
V
V
SS  
SS1  
(1)  
R
001aae713  
(1) Optional for low power operation.  
For typical characteristics of this crystal oscillator, see Table 12.  
Fig. 7. Crystal oscillator circuit  
©
HEF4521B  
All information provided in this document is subject to legal disclaimers.  
Nexperia B.V. 2021. All rights reserved  
Product data sheet  
Rev. 8 — 3 December 2021  
9 / 15  
 
 
 
Nexperia  
HEF4521B  
24-stage frequency divider and oscillator  
Table 12. Typical characteristics for crystal oscillator  
Parameter  
500 kHz circuit  
50 kHz circuit  
Unit  
Crystal characteristics  
Resonance frequency  
500  
S
50  
N
kHz  
-
Crystal cut  
Equivalent resistance; RS  
1
6.2  
kΩ  
External resistor/capacitor values  
Ro  
CT  
CS  
47  
82  
20  
750  
82  
kΩ  
pF  
pF  
20  
001aae715  
2
10  
R
TC  
V
DD  
C
(1)  
(2)  
f
osc  
(kHz)  
R
S
V
V
DD1  
DD  
Y1  
A1  
10  
Y2  
Q18  
A2  
HEF4521B  
1
Q24  
MR  
V
V
SS  
SS1  
- 1  
10  
2
3
2
1
10  
1
10  
10  
R
(kΩ)  
TC  
C (nF)  
10  
10  
- 1  
10  
001aae714  
VDD = 10 V; The test circuit is shown in Fig. 8.  
(1) RTC; C = 1 nF; RS » 2 RTC  
(2) C; RTC = 56 kΩ; RS = 120 kΩ.  
;
, where:  
.
f is in Hz, R is in Ω, and C is in F.  
, where:  
VIL(max) = maximum input voltage LOW;  
II = input leakage current.  
Fig. 8. RC oscillator circuit  
Fig. 9. Oscillator frequency as a function of RTC and C  
©
HEF4521B  
All information provided in this document is subject to legal disclaimers.  
Nexperia B.V. 2021. All rights reserved  
Product data sheet  
Rev. 8 — 3 December 2021  
10 / 15  
 
 
Nexperia  
HEF4521B  
24-stage frequency divider and oscillator  
001aae658  
12.5  
g
fs  
(mA/V)  
10  
7.5  
5
(1)  
(2)  
R
bias  
560 kΩ  
(3)  
V
DD  
0.47 µF  
100 µF  
2.5  
0
A2  
Y2  
V
input  
output  
i
i
A
o
(f = 1 kHz)  
V
0
5
10  
15  
SS  
001aae820  
V
(V)  
DD  
gfs = dio/dvi with vo constant (see Fig. 11).  
Tamb = 25 °C.  
s = observed standard deviation.  
(1) Average +2s  
(2) Average  
(3) Average -2s  
Fig. 10. Test setup for measuring forward  
transconductance  
Fig. 11. Typical forward transconductance gfs as a  
function of the supply voltage  
001aae716  
001aae717  
75  
20  
I
DD  
(mA)  
gain  
(V /V )  
O
I
15  
50  
typ  
typ  
10  
5
25  
0
0
0
5
10  
15  
0
5
10  
15  
V
(V)  
V
(V)  
DD  
DD  
For test setup, see Fig. 14.  
For test setup, see Fig. 14.  
Fig. 13. Supply current as a function of supply voltage  
Fig. 12. Voltage gain VO/VI as a function of supply  
voltage  
330 kΩ  
A2  
Y2  
001aae718  
Fig. 14. Test setup for measuring the voltage gain and supply current graphs  
©
HEF4521B  
All information provided in this document is subject to legal disclaimers.  
Nexperia B.V. 2021. All rights reserved  
Product data sheet  
Rev. 8 — 3 December 2021  
11 / 15  
 
 
Nexperia  
HEF4521B  
24-stage frequency divider and oscillator  
13. Package outline  
SO16: plastic small outline package; 16 leads; body width 3.9 mm  
SOT109-1  
D
E
A
X
v
c
y
H
M
A
E
Z
16  
9
Q
A
2
A
(A )  
3
A
1
pin 1 index  
θ
L
p
L
1
8
e
w
M
detail X  
b
p
0
2.5  
scale  
5 mm  
DIMENSIONS (inch dimensions are derived from the original mm dimensions)  
A
(1)  
(1)  
(1)  
UNIT  
A
A
A
b
c
D
E
e
H
E
L
L
p
Q
v
w
y
Z
θ
1
2
3
p
max.  
0.25  
0.10  
1.45  
1.25  
0.49  
0.36  
0.25  
0.19  
10.0  
9.8  
4.0  
3.8  
6.2  
5.8  
1.0  
0.4  
0.7  
0.6  
0.7  
0.3  
mm  
1.27  
0.05  
1.05  
0.041  
1.75  
0.25  
0.01  
0.25  
0.1  
0.25  
0.01  
8o  
0o  
0.0100  
0.0075  
0.010 0.057  
0.004 0.049  
0.019  
0.014  
0.39  
0.38  
0.16  
0.15  
0.244  
0.228  
0.039 0.028  
0.016 0.020  
0.028  
0.012  
inches  
0.069  
0.01 0.004  
Note  
1. Plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included.  
REFERENCES  
OUTLINE  
EUROPEAN  
PROJECTION  
ISSUE DATE  
VERSION  
IEC  
JEDEC  
JEITA  
99-12-27  
03-02-19  
SOT109-1  
076E07  
MS-012  
Fig. 15. Package outline SOT109-1 (SO16)  
©
HEF4521B  
All information provided in this document is subject to legal disclaimers.  
Nexperia B.V. 2021. All rights reserved  
Product data sheet  
Rev. 8 — 3 December 2021  
12 / 15  
 
Nexperia  
HEF4521B  
24-stage frequency divider and oscillator  
14. Abbreviations  
Table 13. Abbreviations  
Acronym  
CMOS  
DUT  
Description  
Complementary Metal Oxide Semiconductor  
Device Under Test  
ESD  
ElectroStatic Discharge  
Human Body Model  
HBM  
MM  
Machine Model  
15. Revision history  
Table 14. Revision history  
Document ID  
HEF4521B v.8  
Modifications:  
Release date  
20211203  
Data sheet status  
Change notice  
Supersedes  
Product data sheet  
-
HEF4521B v.7  
The format of this data sheet has been redesigned to comply with the identity guidelines of  
Nexperia.  
Legal texts have been adapted to the new company name where appropriate.  
Section 2 updated.  
Section 14 added.  
HEF4521B v.7  
Modifications:  
20160330  
Type number HEF4521BP (SOT38-4) removed.  
20111121 Product data sheet  
Section Applications removed  
Product data sheet  
-
HEF4521B v.6  
HEF4521B v.5  
HEF4521B v.6  
Modifications:  
-
Table 4: added references to Table note [1] and [2]  
Table 7: IOH minimum values changed to maximum  
Fig. 11: space between "2" and "s" removed in figure notes [1] and [3]  
HEF4521B v.5  
20091105  
20090421  
19950101  
19950101  
Product data sheet  
Product data sheet  
Product specification  
Product specification  
-
-
-
-
HEF4521B v.4  
HEF4521B_CNV v.3  
HEF4521B_CNV v.2  
-
HEF4521B v.4  
HEF4521B_CNV v.3  
HEF4521B_CNV v.2  
©
HEF4521B  
All information provided in this document is subject to legal disclaimers.  
Nexperia B.V. 2021. All rights reserved  
Product data sheet  
Rev. 8 — 3 December 2021  
13 / 15  
 
 
Nexperia  
HEF4521B  
24-stage frequency divider and oscillator  
injury, death or severe property or environmental damage. Nexperia and its  
suppliers accept no liability for inclusion and/or use of Nexperia products in  
such equipment or applications and therefore such inclusion and/or use is at  
the customer’s own risk.  
16. Legal information  
Quick reference data — The Quick reference data is an extract of the  
product data given in the Limiting values and Characteristics sections of this  
document, and as such is not complete, exhaustive or legally binding.  
Data sheet status  
Document status Product  
Definition  
Applications — Applications that are described herein for any of these  
products are for illustrative purposes only. Nexperia makes no representation  
or warranty that such applications will be suitable for the specified use  
without further testing or modification.  
[1][2]  
status [3]  
Objective [short]  
data sheet  
Development  
This document contains data from  
the objective specification for  
product development.  
Customers are responsible for the design and operation of their applications  
and products using Nexperia products, and Nexperia accepts no liability for  
any assistance with applications or customer product design. It is customer’s  
sole responsibility to determine whether the Nexperia product is suitable  
and fit for the customer’s applications and products planned, as well as  
for the planned application and use of customer’s third party customer(s).  
Customers should provide appropriate design and operating safeguards to  
minimize the risks associated with their applications and products.  
Preliminary [short]  
data sheet  
Qualification  
Production  
This document contains data from  
the preliminary specification.  
Product [short]  
data sheet  
This document contains the product  
specification.  
[1] Please consult the most recently issued document before initiating or  
completing a design.  
Nexperia does not accept any liability related to any default, damage, costs  
or problem which is based on any weakness or default in the customer’s  
applications or products, or the application or use by customer’s third party  
customer(s). Customer is responsible for doing all necessary testing for the  
customer’s applications and products using Nexperia products in order to  
avoid a default of the applications and the products or of the application or  
use by customer’s third party customer(s). Nexperia does not accept any  
liability in this respect.  
[2] The term 'short data sheet' is explained in section "Definitions".  
[3] The product status of device(s) described in this document may have  
changed since this document was published and may differ in case of  
multiple devices. The latest product status information is available on  
the internet at https://www.nexperia.com.  
Definitions  
Limiting values — Stress above one or more limiting values (as defined in  
the Absolute Maximum Ratings System of IEC 60134) will cause permanent  
damage to the device. Limiting values are stress ratings only and (proper)  
operation of the device at these or any other conditions above those  
given in the Recommended operating conditions section (if present) or the  
Characteristics sections of this document is not warranted. Constant or  
repeated exposure to limiting values will permanently and irreversibly affect  
the quality and reliability of the device.  
Draft — The document is a draft version only. The content is still under  
internal review and subject to formal approval, which may result in  
modifications or additions. Nexperia does not give any representations or  
warranties as to the accuracy or completeness of information included herein  
and shall have no liability for the consequences of use of such information.  
Short data sheet — A short data sheet is an extract from a full data sheet  
with the same product type number(s) and title. A short data sheet is  
intended for quick reference only and should not be relied upon to contain  
detailed and full information. For detailed and full information see the relevant  
full data sheet, which is available on request via the local Nexperia sales  
office. In case of any inconsistency or conflict with the short data sheet, the  
full data sheet shall prevail.  
Terms and conditions of commercial sale — Nexperia products are  
sold subject to the general terms and conditions of commercial sale, as  
published at http://www.nexperia.com/profile/terms, unless otherwise agreed  
in a valid written individual agreement. In case an individual agreement is  
concluded only the terms and conditions of the respective agreement shall  
apply. Nexperia hereby expressly objects to applying the customer’s general  
terms and conditions with regard to the purchase of Nexperia products by  
customer.  
Product specification — The information and data provided in a Product  
data sheet shall define the specification of the product as agreed between  
Nexperia and its customer, unless Nexperia and customer have explicitly  
agreed otherwise in writing. In no event however, shall an agreement be  
valid in which the Nexperia product is deemed to offer functions and qualities  
beyond those described in the Product data sheet.  
No offer to sell or license — Nothing in this document may be interpreted  
or construed as an offer to sell products that is open for acceptance or the  
grant, conveyance or implication of any license under any copyrights, patents  
or other industrial or intellectual property rights.  
Export control — This document as well as the item(s) described herein  
may be subject to export control regulations. Export might require a prior  
authorization from competent authorities.  
Disclaimers  
Limited warranty and liability — Information in this document is believed  
to be accurate and reliable. However, Nexperia does not give any  
representations or warranties, expressed or implied, as to the accuracy  
or completeness of such information and shall have no liability for the  
consequences of use of such information. Nexperia takes no responsibility  
for the content in this document if provided by an information source outside  
of Nexperia.  
Non-automotive qualified products — Unless this data sheet expressly  
states that this specific Nexperia product is automotive qualified, the  
product is not suitable for automotive use. It is neither qualified nor tested in  
accordance with automotive testing or application requirements. Nexperia  
accepts no liability for inclusion and/or use of non-automotive qualified  
products in automotive equipment or applications.  
In no event shall Nexperia be liable for any indirect, incidental, punitive,  
special or consequential damages (including - without limitation - lost  
profits, lost savings, business interruption, costs related to the removal  
or replacement of any products or rework charges) whether or not such  
damages are based on tort (including negligence), warranty, breach of  
contract or any other legal theory.  
In the event that customer uses the product for design-in and use in  
automotive applications to automotive specifications and standards,  
customer (a) shall use the product without Nexperia’s warranty of the  
product for such automotive applications, use and specifications, and (b)  
whenever customer uses the product for automotive applications beyond  
Nexperia’s specifications such use shall be solely at customer’s own risk,  
and (c) customer fully indemnifies Nexperia for any liability, damages or failed  
product claims resulting from customer design and use of the product for  
automotive applications beyond Nexperia’s standard warranty and Nexperia’s  
product specifications.  
Notwithstanding any damages that customer might incur for any reason  
whatsoever, Nexperia’s aggregate and cumulative liability towards customer  
for the products described herein shall be limited in accordance with the  
Terms and conditions of commercial sale of Nexperia.  
Translations — A non-English (translated) version of a document is for  
reference only. The English version shall prevail in case of any discrepancy  
between the translated and English versions.  
Right to make changes — Nexperia reserves the right to make changes  
to information published in this document, including without limitation  
specifications and product descriptions, at any time and without notice. This  
document supersedes and replaces all information supplied prior to the  
publication hereof.  
Trademarks  
Suitability for use — Nexperia products are not designed, authorized or  
warranted to be suitable for use in life support, life-critical or safety-critical  
systems or equipment, nor in applications where failure or malfunction  
of an Nexperia product can reasonably be expected to result in personal  
Notice: All referenced brands, product names, service names and  
trademarks are the property of their respective owners.  
©
HEF4521B  
All information provided in this document is subject to legal disclaimers.  
Nexperia B.V. 2021. All rights reserved  
Product data sheet  
Rev. 8 — 3 December 2021  
14 / 15  
 
Nexperia  
HEF4521B  
24-stage frequency divider and oscillator  
Contents  
1. General description......................................................1  
2. Features and benefits.................................................. 1  
3. Ordering information....................................................1  
4. Functional diagram.......................................................2  
5. Pinning information......................................................4  
5.1. Pinning.........................................................................4  
5.2. Pin description.............................................................4  
6. Count capacity..............................................................4  
7. Functional test..............................................................5  
8. Limiting values............................................................. 5  
9. Recommended operating conditions..........................6  
10. Static characteristics..................................................6  
11. Dynamic characteristics.............................................7  
11.1. Waveforms and test circuit........................................ 8  
12. Application information............................................. 9  
13. Package outline........................................................ 12  
14. Abbreviations............................................................13  
15. Revision history........................................................13  
16. Legal information......................................................14  
© Nexperia B.V. 2021. All rights reserved  
For more information, please visit: http://www.nexperia.com  
For sales office addresses, please send an email to: salesaddresses@nexperia.com  
Date of release: 3 December 2021  
©
HEF4521B  
All information provided in this document is subject to legal disclaimers.  
Nexperia B.V. 2021. All rights reserved  
Product data sheet  
Rev. 8 — 3 December 2021  
15 / 15  

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