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HCF4521B
24-STAGE FREQUENCY DIVIDER
s s s s
s
s s s
s s
HIGH NOISE IMMUNITY VOLTAGE SUPPLY RANGE 3V TO 18V ALL STAGE ARE PRESETTABLE RESET DISABLES THE RC OSCILLATOR FOR LOW STANDBY POWER DRAIN RC AND CRYSTAL OSCILLATOR OUTPUT ARE CAPABLE OF DRIVING EXTERNAL LOADS QUIESCENT CURRENT SPECIF. UP TO 20V 5V, 10V AND 15V PARAMETRIC RATINGS INPUT LEAKAGE CURRENT II = 100nA (MAX) AT VDD = 18V TA = 25C 100% TESTED FOR QUIESCENT CURRENT MEETS ALL REQUIREMENTS OF JEDEC JESD13B "STANDARD SPECIFICATIONS FOR DESCRIPTION OF B SERIES CMOS DEVICES"
DIP
SOP
ORDER CODES
PACKAGE DIP SOP TUBE HCF4521BEY HCF4521BM1 T&R HCF4521M013TR
DESCRIPTION HCF4521B is a monolithic integrated circuit fabricated in Metal Oxide Semiconductor technology available in DIP and SOP packages. HCF4521B has a chain of 24 flip-flops with an input circuit that allows three modes of operation.
The input circuit functions as a crystal or RC oscillator or as an input buffer for an external oscillator. Each flip-flop preforms a divide-by-two function giving a total count of 224 = 16,777,216. The count advances on the negative going edge of the clock. Access is available to the final seven stages giving the device added flexibility.
PIN CONNECTION
October 2002
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HCF4521B
IINPUT EQUIVALENT CIRCUIT PIN DESCRIPTION
PIN No 10, 11, 12, 13, 14, 15, 1 2 4 7 9 6 3 5 8 16 SYMBOL Q18 to Q24 RESET OUT2 OUT1 IN1 IN2 VSS1 VDD1 VSS VDD NAME AND FUNCTION Outputs Counter Reset Input Output Crystal Oscillator Output RC Oscillator Clock Input Clock Input Ext. Neg. Supply Voltage Ext. Pos. Supply Voltage Negative Supply Voltage Positive Supply Voltage
BLOCK DIAGRAM
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HCF4521B
FUNCTIONAL TEST SEQUENCE
INPUTS RESET IN 2 OUT OUTPUTS VSS1 VDD1 COMMENTS Q18 - Q24 Counter is in three 8-stage sections in parallel mode Counter in reset. IN 2 and OUT 2 are tied together First LOW-to-HIGH transition at IN 2 255 LOW-to-HIGH transition are clocked in at IN 2 The 255th LOW-to-HIGH transition
H
L
L
VDD
VSS
L
L L L L L L L L L
H L H H L L H H L
H L H H L L L L H
VDD VDD VDD VDD VDD VSS VSS VSS VSS
VSS VSS VSS VSS VSS VSS VDD VDD VDD
L L L H H H H H L
Counter Converted Back to 24-Stage in Series Mode OUT 2 reverts to output operation Counter ripples from an all-HIGH state to an all-LOW state
A test function (see Functional Test Circuit) has been included for the reduction of test time required to exercise all 24 counter stages. This test function divides the counter into three 8-stage sections and 255 counts are loaded in each of the 8-stage sections in parallel. All flip-flop are now at a logic "1". The counter in now returned to the normal 24-stages in series configuration. One more pulse is entered into Input 2 (In2) which will cause the counter to ripple from an all "1" state to an all "0" state.
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HCF4521B
FUNCTIONAL DIAGRAM
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HCF4521B
ABSOLUTE MAXIMUM RATINGS
Symbol VDD VI II PD Top Tstg Supply Voltage DC Input Voltage DC Input Current Power Dissipation per Package Power Dissipation per Output Transistor Operating Temperature Storage Temperature Parameter Value -0.5 to +22 -0.5 to VDD + 0.5 10 200 100 -55 to +125 -65 to +150 Unit V V mA mW mW C C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. All voltage values are referred to VSS pin voltage.
RECOMMENDED OPERATING CONDITIONS
Symbol VDD VI Top Supply Voltage Input Voltage Operating Temperature Parameter Value 3 to 20 0 to VDD -55 to 125 Unit V V C
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HCF4521B
DC SPECIFICATIONS
Test Condition Symbol Parameter VI (V) 0/5 0/10 0/15 0/20 0/5 0/10 0/15 5/0 10/0 15/0 0.5/4.5 1/9 1.5/13.5 4.5/0.5 9/1 13.5/1.5 2.5 4.6 9.5 13.5 0.4 0.5 1.5 VO (V) |IO| VDD (A) (V) 5 10 15 20 5 10 15 5 10 15 5 10 15 5 10 15 5 5 10 15 5 10 15 18 TA = 25C Min. Typ. 0.04 0.04 0.04 0.08 4.95 9.95 14.95 0.05 0.05 0.05 3.5 7 11 1.5 3 4 -1.36 -0.44 -1.1 -3.0 0.44 1.1 3.0 -3.2 -1 -2.6 -6.8 1 2.6 6.8 10-5 5 -1.1 -0.36 -0.9 -2.4 0.36 0.9 2.4 3.5 7 11 1.5 3 4 -1.1 -0.36 -0.9 -2.4 0.36 0.9 2.4 Max. 5 10 20 100 4.95 9.95 14.95 0.05 0.05 0.05 3.5 7 11 1.5 3 4 Value -40 to 85C Min. Max. 150 300 600 3000 4.95 9.95 14.95 0.05 0.05 0.05 -55 to 125C Min. Max. 150 300 600 3000 Unit
IL
Quiescent Current
A
VOH
High Level Output Voltage Low Level Output Voltage High Level Input Voltage Low Level Input Voltage Output Drive Current
VOL
VIH
VIL
IOH
IOL
Output Sink Current Input Leakage Current Input Capacitance
0/5 0/5 0/10 0/15 0/5 0/10 0/15 0/18
<1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1
V
V
V
V
mA
mA
II
Any Input Any Input
0.1
7.5
1
1
A
pF
CI
The Noise Margin for both "1" and "0" level is: 1V min. with VDD =5V, 2V min. with VDD=10V, 2.5V min. with VDD=15V
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HCF4521B
DYNAMIC ELECTRICAL CHARACTERISTICS (Tamb = 25C, CL = 50pF, RL = 200K, tr = tf = 20 ns)
Test Condition Symbol tPLH Parameter Output Rise Time VDD (V) 5 10 15 5 10 15 5 10 15 5 10 15 5 10 15 5 10 15 5 10 15 5 10 15 5 10 15 Min. Value (*) Typ. 100 50 40 100 50 40 4.5 1.7 1.3 6.0 2.2 1.7 1300 500 375 140 55 40 3.5 9 12 Max. 200 100 80 200 100 80 9.0 3.5 2.7 12 4.5 3.5 2600 1000 750 ns Unit
tPHL
Output Fall Time
ns
tPHL , tPLH tPHL , tPLH tPHL
Propagation Delay Time Clock to Q18 Propagation Delay Time Clock to Q24 Propagation Delay Time RESET to Qn Clock Pulse Width
s
s
ns
tWH(d)
385 150 120
ns 2 5 6.5 15 15 15
fcl
Clock Pulse Frequency
MHz
tTHL , tTLH tW(R)
Clock Rise and Fall Time
s
Reset Pulse Width
1400 600 450
700 300 225
ns
(*) Typical temperature coefficient for all VDD value is 0.3 %/C.
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HCF4521B
RC OSCILLATOR CIRCUIT
FUNCTIONAL TEST CIRCUIT
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HCF4521B
TYPICAL DATA FOR CRYSTAL OSCILLATOR CIRCUIT
CHARACTERISTIC Crystal Characteristics Resonant Frequency Equivalent Resistance, Rs RO External Resistor/Capacitor Values CT CS Frequency Stability Frequency Change as a Function of VDD (TA = 25C Frequency Change as a Function of temperature VDD = 10V TA Change from -55C to 25C TA Change from 25C to 125C VDD Change from 5V to 10V VDD Change from 10V to 15V HCF4521B only Complete Oscillator * HCF4521B only Complete Oscillator * 500 kHz CIRCUIT 500 1 47 82 20 6 2 -4 100 -2 160 50 kHz CIRCUIT 50 6.2 750 82 20 2 2 -2 120 -2 -560 UNIT kHz k k pF pF ppm ppm ppm ppm ppm ppm
* Complete oscillator includes crystal, capacitors and resistors.
CRYSTAL OSCILLATOR CIRCUIT
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HCF4521B
Plastic DIP-16 (0.25) MECHANICAL DATA
mm. DIM. MIN. a1 B b b1 D E e e3 F I L Z 3.3 1.27 8.5 2.54 17.78 7.1 5.1 0.130 0.050 0.51 0.77 0.5 0.25 20 0.335 0.100 0.700 0.280 0.201 1.65 TYP MAX. MIN. 0.020 0.030 0.020 0.010 0.787 0.065 TYP. MAX. inch
P001C
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HCF4521B
SO-16 MECHANICAL DATA
DIM. A a1 a2 b b1 C c1 D E e e3 F G L M S 3.8 4.6 0.5 9.8 5.8 1.27 8.89 4.0 5.3 1.27 0.62 8 (max.) 0.149 0.181 0.019 10 6.2 0.35 0.19 0.5 45 (typ.) 0.385 0.228 0.050 0.350 0.157 0.208 0.050 0.024 0.393 0.244 0.1 mm. MIN. TYP MAX. 1.75 0.2 1.65 0.46 0.25 0.013 0.007 0.019 0.003 MIN. inch TYP. MAX. 0.068 0.007 0.064 0.018 0.010
PO13H
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HCF4521B
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. (c) The ST logo is a registered trademark of STMicroelectronics (c) 2002 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - United States. (c) http://www.st.com
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