1. General description
The HEF4541B is a programmable timer which consists of a 16-stage binary counter, an
integrated oscillator to be used with external timing components, an automatic power-on
reset and output control logic. The frequency of the oscillator is determined by the external
component s RTC and CTC within the frequency range 1 Hz to 100 kHz. This oscillator may
be replaced by an external clock signal at input RS, the timer advances on the
positive-going transition of RS. A LOW on the auto reset input (AR) and a LOW on the
master reset input (MR) enables the internal power-on reset. A HIGH level at input MR
resets the counter independent on all other inputs. Resetting disables the oscillator to
provide no active power dissipation.
A HIGH at input AR turns off the power-on reset to provide a low quiescent power
dissipation of the timer. The 16-stage counter divides the oscillator frequency by 28, 210,
213 or 216 depending on the state of the address inputs (A0, A1). The divided oscillator
frequency is available at output O. The phase input (PH) featur es a complement ary output
signal. When the mode select input (MODE) is LOW the timer is a single transitio n timer
and when HIGH the timer is a 2n frequency divider.
It operates over a recommended VDD power supply r ange of 3 V to 1 5 V referenced to VSS
(usually ground). Unused inputs must be connected to VDD, VSS, or another input.
2. Features and benefits
Fully static operation
5 V, 10 V, and 15 V parametric ratings
Standardized symmetrical output characteristics
Operates across the automotive temperature range 40 C to +85 C
Complies with JEDEC standard JESD 13-B
3. Ordering information
HEF4541B
Programmable timer
Rev. 5 — 15 December 2015 Product data sheet
Table 1. Ordering information
All types operate from
40
C to +85
C.
Type number Package
Name Description Version
HEF4541BT SO14 plastic small outline package; 14 leads; body width 3.9 mm SOT108-1
© Nexperia B.V. 2017. All rights reserved
HEF4541B All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 5 — 15 December 2015 2 of 16
Nexperia HEF4541B
Programmable timer
4. Functional diagram
Fig 1. Functional di agram
DDL
56
&7&
57&
$
$
02'(
$5
05
3+
2
&21752/,13876
%,1$5<
&2817(5
&3
&'
32:(521
5(6(7
287387
67$*(
Fig 2. Logic diag ram
DDL
$
56
$
$5
05
02'(
3+
2
/$7&+
57&
&7&
32:(521
5(6(7
08;
5(6(7
&3 &2817(5
5(6(7
&3 &2817(5
© Nexperia B.V. 2017. All rights reserved
HEF4541B All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 5 — 15 December 2015 3 of 16
Nexperia HEF4541B
Programmable timer
5. Pinning information
5.1 Pinning
5.2 Pin description
Fig 3. Pin configuratio n
+()%
57
&9
'
'
&7&
$
5
6$
QF QF
$
5
02'(
0
53
+
96
62
DDL
Table 2. Pin description
Symbol Pin Description
RTC 1 external resistor connection
CTC 2 external capacitor connection
RS 3 external resistor connection (RS) or external clock input
nc 4, 11 not connected
AR 5 auto reset input (active low)
MR 6 master reset input
VSS 7 ground (0 V)
O 8 timer output
PH 9 phase input
MODE 10 mode select input
A0, A1 12, 13 address inputs
VDD 14 supply voltage
© Nexperia B.V. 2017. All rights reserved
HEF4541B All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 5 — 15 December 2015 4 of 16
Nexperia HEF4541B
Programmable timer
6. Functional description
[1] H = HIGH voltage level; L = LOW voltage level; X = don’t care.
[2] For correct power-on reset, the supply voltage should be above 8.5 V. For VDD < 8.5 V, disable the autoreset and connect AR to VDD.
[3] The timer is initialized on a reset pulse and the output changes state after 2n-1 counts and remains in that state (latched). Reset of this
latch is obtained by master reset or by a LOW to HIGH transition on the MODE input.
7. Limiting values
[1] For SO14 package: Ptot derates linearly with 8 mW/K above 70 C.
Table 3. Function table[1]
Input MODE
AR MR PH MODE
H L X X auto reset disabled
L L X X auto reset enabled[2]
XHXXmaster reset active
X L X H normal operati on selected division to output
X L X L single-cycle mode [3]
X L L X ou tp u t initially LOW after r ese t
X L H X output initially HIGH, after reset
Table 4. Frequency selection table
A0 A1 Number of counter stages n
L L 13 8192
L H 10 1024
H L 8 256
H H 16 65536
fOSC
fO
----------2n
=
Table 5. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol Parameter Conditions Min Max Unit
VDD supply voltage 0.5 +18 V
IIK input clamping current VI<0.5 V or VI>V
DD + 0.5 V - 10 mA
VIinput voltage 0.5 VDD + 0.5 V
IOK output clamping current VO<0.5 V or VO>V
DD + 0.5 V - 10 mA
II/O input/output current O output - 10 mA
Tstg storage temperature 65 +150 C
Tamb ambient temperature 40 +85 C
Ptot total power dissipation Tamb = 40 C to +85 C
SO14 package [1] - 500 mW
P power dissipation - 100 mW
© Nexperia B.V. 2017. All rights reserved
HEF4541B All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 5 — 15 December 2015 5 of 16
Nexperia HEF4541B
Programmable timer
8. Recommended operating conditions
9. Static characteristics
Table 6. Recommended operating con ditions
Symbol Parameter Conditions Min Max Unit
VDD supply voltage 3 15 V
VIinput voltage 0 VDD V
Tamb ambient temperature in free air 40 +85 C
t/V input transition rise and fall rate VDD = 5 V - 3.75 s/V
VDD = 10 V - 0.5 s/V
VDD = 15 V - 0.08 s/V
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 CUnit
Min Max Min Max Min Max
VIH HIGH-level
input voltage IO<1 A 5 V 3.5 - 3.5 - 3.5 - V
10 V 7.0 - 7.0 - 7.0 - V
15 V 11.0 - 11.0 - 11.0 - V
VIL LOW-level
input voltage IO<1 A 5 V - 1.5 - 1.5 - 1.5 V
10 V - 3.0 - 3.0 - 3.0 V
15 V - 4.0 - 4.0 - 4.0 V
VOH HIGH-level
output voltage IO<1 A 5 V 4.95 - 4.95 - 4.95 - V
10 V 9.95 - 9.95 - 9.95 - V
15 V 14.95 - 14.95 - 14.95 - V
VOL LOW-level
output voltage IO<1 A 5 V - 0.05 - 0.05 - 0.05 V
10 V - 0.05 - 0.05 - 0.05 V
15 V - 0.05 - 0.05 - 0.05 V
IOH HIGH-level
output current CTC, RTC;
VO = 2.5 V 5 V - 1.4 - 1.2 - 0.95 mA
VO=4.6V 5 V - 0.5 - 0.4 - 0.3 mA
VO = 9.5 V 10 V - 1.4 - 1.2 - 0.95 mA
VO = 13.5 V 15 V - 4.8 - 4.0 - 3.2 mA
O;VO = 2.5 V 5 V - 1.7 - 1.4 - 1.1 mA
VO=4.6V 5 V - 0.64 - 0.5 - 0.36 mA
VO = 9.5 V 10 V - 1.6 - 1.3 - 0.9 mA
VO = 13.5 V 15 V - 4.2 - 3.4 - 2.4 mA
© Nexperia B.V. 2017. All rights reserved
HEF4541B All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 5 — 15 December 2015 6 of 16
Nexperia HEF4541B
Programmable timer
IOL LOW-level
output current CTC, RTC;
VO = 0.4 V 5 V 0.33 - 0.27 - 0.20 - mA
VO = 0.5 V 10 V 1.0 - 0.85 - 0.68 - mA
VO = 1.5 V 15 V 3.2 - 2.7 - 2.3 - mA
O;VO = 0.4 V 5 V 0.64 - 0.5 - 0.36 - mA
VO = 0.5 V 10 V 1.6 - 1.3 - 0.9 - mA
VO = 1.5 V 15 V 4.2 - 3.2 - 2.4 - mA
IIinput leakage
current 15 V - 0.1 - 0.1 - 1.0 A
IDD supply current IO = 0 A 5 V - 5 - 5 - 150 A
10 V - 10 - 10 - 300 A
15 V - 20 - 20 - 600 A
CIinput capacitance - - - - 7.5 - - pF
Table 7. Static characteristics …continued
VSS = 0 V; VI = VSS or VDD; unless otherwise specified.
Symbol Parameter Conditions VDD Tamb = 40 C Tamb = 25 C Tamb = 85 CUnit
Min Max Min Max Min Max
Table 8. Reset characteristics
VSS = 0 V; VI = VSS or VDD; see Table 12 fo r test conditions; un less otherwise specified.
Symbol Parameter Conditions VDD Tamb = 40 C Tamb = +25 C Tamb = +85 CUnit
Min Max Min Typ Max Min Max
IDD supply current supply current for
power-on reset
enable;
AR = MR = 0 V; Other
inputs at 0 V or VDD
5 V - 80 - 20 80 - 230 A
10 V - 750 - 250 600 - 700 A
15 V - 1.6 - 0.5 1.3 - 1.5 mA
VDD supply voltage supply voltage for
automatic reset
initialization;
AR = MR = 0 V; Other
inputs at 0 V or VDD
---8.55---V
© Nexperia B.V. 2017. All rights reserved
HEF4541B All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 5 — 15 December 2015 7 of 16
Nexperia HEF4541B
Programmable timer
10. Dynamic characteristics
[1] The typical values of the propagation delay and transition times are calculated from the extrapolation formulas shown (CL in pF).
[2] tpd is the same as tPHL and tPLH.
[3] tW is the same as tWL(min) and tWH(min).
Table 9. Dynamic characteristics
VSS = 0 V; Tamb = 25
C unless otherwise specified. For test circuit, see Figure 5.
Symbol Parameter Conditions VDD Extrapolation formula Min Typ[1] Max Unit
tpd propagation delay RS to O;
28selected;
see Figure 4
5 V [2] 348 ns + (0.55 ns/p F)CL- 375 750 ns
10 V 139 ns + (0.23 ns/pF)CL- 150 300 ns
15 V 102 ns + (0.16 ns/pF)CL- 110 220 ns
RS to O;
210 selected;
see Figure 4
5 V 398 ns + (0.55 ns /p F)CL- 425 850 ns
10 V 154 ns + (0.23 ns/pF)CL- 165 330 ns
15 V 112 ns + (0.16 ns/pF)CL- 120 240 ns
RS to O;
213 selected;
see Figure 4
5 V 483 ns + (0.55 ns /p F)CL- 510 1020 ns
10 V 179 ns + (0.23 ns/pF)CL- 190 380 ns
15 V 127 ns + (0.16 ns/pF)CL- 135 270 ns
RS to O;
216 selected;
see Figure 4
5 V 548 ns + (0.55 ns /p F)CL- 575 1150 ns
10 V 199 ns + (0.23 ns/pF)CL- 210 420 ns
15 V 142 ns + (0.16 ns/pF)CL- 150 300 ns
tWpulse width RS LOW;
MR HIGH;
see Figure 4
5 V [3] 60 30 - ns
10 V 30 15 - ns
15 V 24 12 - ns
fclk(max) maximum clock
frequency RS; see Figure 4 5 V 8 16 - MHz
10 V 15 30 - MHz
15 V 18 36 - MHz
fosc oscillator frequency Rt = 5 k;
Ct=1nF;
RS=10k;
see Figure 6
5 V - 90 - kHz
10 V - 90 - kHz
15 V - 90 - kHz
Rt = 56 k;
Ct=1nF;
RS= 120 k;
see Figure 6
5 V - 8 - kHz
10 V - 8 - kHz
15 V - 8 - kHz
© Nexperia B.V. 2017. All rights reserved
HEF4541B All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 5 — 15 December 2015 8 of 16
Nexperia HEF4541B
Programmable timer
[1] fi= input frequency in MHz; fo = output frequency in MHz; CL = output load capacitance in pF; VDD = supply voltage in V;
fosc = oscillator frequency in MHz; CTC = timing capacitance in pF.
11. Waveforms
Table 10. Dynamic power dissipation
PD can be calculated from the formulas shown. VSS = 0 V; tr = tf
20 ns; Tamb = 25
C.
Symbol Parameter VDD Typical formula
Per package
PDdynamic power dissipation 5 V PD = 1300 fi + (fo CL VDD2) W
10 V PD = 5300 fi + (fo CL VDD2)W
15 V PD = 12000 fi + (fo CL VDD2) W
Using the on-chip o scillator
PD(Tot) Total dynamic power dissipation 5 V PD = 1300 fosc + foCLVDD2 + 2CTCVDD2 fosc + 10VDD W
10 V PD = 5300 fosc + foCLVDD2 + 2CTCVDD2 fosc + 100VDD W
15 V PD = 12000 fosc + foCLVDD2 + 2CTCVDD2 fosc + 400VDD W
VOL and VOH are typical output voltage levels that occur with the output load.
Measurement are points given in Table 11, the test circuit in Figure 5 and the test data in Table 12
(1) 2n pulses as selected by address inputs (A0, A1).
Fig 4. Propagation delay clock (RS) to output (O), clock pulse width and maximum clock frequency
DDD
56LQSXW
9
,
9
66
2RXWSXW
9
2+
9
2/
05LQSXW
9
,
9
66
W
:+PLQ
9
0
9
0
I
FONPD[
W
:+PLQ
W
:/PLQ
W
3/+
W
3+/
Table 11. Measurement points
Supply voltage Input Output
VDD VMVM
5 V to 15 V 0.5VDD 0.5VDD
© Nexperia B.V. 2017. All rights reserved
HEF4541B All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 5 — 15 December 2015 9 of 16
Nexperia HEF4541B
Programmable timer
Test data is given in Table 12.
Definitions for test circuit:
DUT - Device Under Test.
RL = Load resistance.
CL = load capacitance.
RT = Termination resistance should be equal to output impedance of Zo of the pulse generator.
Fig 5. Test circuit for measuring switching times
9
''
9
,
9
2
DDJ
'87
&/
57
*
Table 12. Test data
Supply Input Load
VDD VItr, tfCL
5 V to 15 V VSS or VDD 20 ns 50 pF
© Nexperia B.V. 2017. All rights reserved
HEF4541B All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 5 — 15 December 2015 10 of 16
Nexperia HEF4541B
Programmable timer
12. Application information
RC oscillator timing component limitations
The oscillator frequency is mainly determined by RTCCTC, provided RTC << RS and
RSC2<< RTCCTC. The function of RS is to minimize the influence of the forward volt age
across the input protection diodes on the frequency. The stray capacitance C2 should be
kept as small as possible. In consideration of accuracy, CTC must be larger than the
inherent stray capacitance. RTC must be larger than the LOCMOS ‘ON’ resistance in
series with it, which typically is 500 at VDD = 5 V, 300 at VDD = 10 V and 200 at
VDD =15V.
The recommended values for these components to maintain agreement with the typical
oscillation formula are: CTC 100 pF, up to any typical value, 10 k RTC 1 M.
Typical formula for oscillator frequency: .
Fig 6. Externa l component connection for RC oscillator; RS ≈ RTC
DDL
& 56&7& 57&
56
&7&
57&
FORFNWR
FRXQWHU
UHVHW
IURPORJLF
fosc 1
2.3 RTC
CTC
----------------------------------------
=
a. CTC curve at RTC = 56 k; RS = 120 k.b.R
TC curve at CTC = 1 nF; RS = 2 RTC.
Fig 7. RC oscillator frequency as a fun cti on of R TC and CTC at VDD = 5 to 15 V; Tamb = 25 C
DDL
&
7&
)
IRVF
+]
DDL
5
7&
IRVF
+]
© Nexperia B.V. 2017. All rights reserved
HEF4541B All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 5 — 15 December 2015 11 of 16
Nexperia HEF4541B
Programmable timer
a. RTC = 56 k; CTC = 1 nF; RS = 0 .b.R
TC = 56 k; CTC = 1 nF; RS = 120 k.
Fig 8. Frequency de v ia tion (f) as a function of ambient temperature
7
DPE
&
DDL
I
9'' 9
9
9
7
DPE
&
DDL
I
9'' 9
9
9
© Nexperia B.V. 2017. All rights reserved
HEF4541B All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 5 — 15 December 2015 12 of 16
Nexperia HEF4541B
Programmable timer
13. Package outline
Fig 9. Package outline SOT108-1 (SO14)
81,7 $
PD[ $
$
$
E
S F '
(
H +
( / /
S 4 =\ZY ș
5()(5(1&(6
287/,1(
9(56,21
(8523($1
352-(&7,21 ,668('$7(
,(& -('(& -(,7$
PP
LQFKHV
R
R
',0(16,216LQFKGLPHQVLRQVDUHGHULYHGIURPWKHRULJLQDOPPGLPHQVLRQV
1RWH
3ODVWLFRUPHWDOSURWUXVLRQVRIPPLQFKPD[LPXPSHUVLGHDUHQRWLQFOXGHG
627
;
Z 0
ș
$
$
$
E
S
'
+
(
/
S
4
GHWDLO;
(
=
H
F
/
Y 0 $
$
$
\
( 06
SLQLQGH[
PP
VFDOH
62SODVWLFVPDOORXWOLQHSDFNDJHOHDGVERG\ZLGWKPP 627
© Nexperia B.V. 2017. All rights reserved
HEF4541B All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 5 — 15 December 2015 13 of 16
Nexperia HEF4541B
Programmable timer
14. Abbreviations
15. Revision history
Table 13. Abbreviations
Acronym Description
CMOS Complementary Metal Oxide Semiconductor
DUT Device Under Test
ESD ElectroStatic Discharge
HBM Human Body Model
MM Machine Model
TTL Transistor-Transistor Logic
Table 14. Revision history
Document ID Release date Data sheet status Change notice Supersedes
HEF4541B v.5 20151215 Product data sheet - HEF4541B v.4
Modifications: •Type number HEF4541BP (SOT27-1) removed.
HEF4541B v.4 20120625 Product data sheet - HEF4541B_CNV v.3
Modifications: •The format of this data sheet has been redesigned to comply with the new identity guidelines
of NXP Semiconductors.
•Legal texts have been adapted to the new company name where appropriate.
•Section 2 “Features and benefits” added.
HEF4541B_CNV v.3 19950101 Product sp ecification - HEF4541B _CNV v. 2
HEF4541B_CNV v.2 19950101 Product sp ecification - -
© Nexperia B.V. 2017. All rights reserved
HEF4541B All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 5 — 15 December 2015 14 of 16
Nexperia HEF4541B
Programmable timer
16. Legal information
16.1 Data sheet status
[1] Please consult the most recently issued document before initiating or completing a design.
[2] The term ‘short data sheet’ is explained in section “Definitions”.
[3] The product status of device (s) descr ibed in th is document m ay have cha nged since thi s document w as publish ed and may di ffe r in case of multiple devices. The latest product status
information is available on the Internet at URL http://www.nexperia.com.
16.2 Definitions
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 liab ility 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 tit le. A short data sh eet is intended
for quick reference only and shou ld not b e relied u pon to cont ain det ailed 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 pre va il.
Product specificat ion — 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 off er functions and qualities beyond those described in the
Product data sheet.
16.3 Disclaimers
Limited warr a nty and liability — Information in this document is believed to
be accurate and reliable. However, Nexperia does not give any
representations or warrant ies, 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.
In no event shall Nexperia be liable for any indirect, incidental,
punitive, special or consequ ential damages (including - wit hout 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.
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.
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 informa tion supplied prior
to the publication hereof .
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 a Nexperia product can reasonably be expected
to result in perso nal 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 ther efore such inclu sion and/or use is at the cu stomer’s own
risk.
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.
Customers are responsible for the design and ope ration 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 fo r the planned application and use of
customer’s third party customer(s). Custo mers should provide appropriate
design and operating safeguards to minimize the risks associate d with their
applications and products.
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 custo mer(s). Customer is responsible for doing all necessa ry
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.
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.
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.
No offer to sell or license — Nothing i n this document may be interpreted or
construed as an of fer t o sell product s that is open for accept ance or the gr ant,
conveyance or implication of any license under any copyrights, patents or
other industrial or inte llectual property rights.
Document status[1][2] Product status[3] Definition
Objective [short] data sheet Development This document contain s data from the objective specification for product development.
Preliminary [short] dat a sheet Qualification This document contains data from the preliminary specificat ion.
Product [short] data sheet Production This document contains the product specification.
© Nexperia B.V. 2017. All rights reserved
HEF4541B All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 5 — 15 December 2015 15 of 16
Nexperia HEF4541B
Programmable timer
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.
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 i s neit her qualif ied 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 the event that customer uses the product for design-in and use in
automotive applications to automot ive specifications and standards, custome r
(a) shall use the product without Nexperia’s warranty of the
product for such au tomotive 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 produ ct cl aims resulting from custome r design and
use of the product for automotive applications beyond Nexperia’s
standard warranty and Nexperia’s product specifications.
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.
16.4 Trademarks
Notice: All referenced b rands, produc t names, service names and trademarks
are the property of their respective ow ners.
17. Contact information
For more information, please visit: http://www.nexperia.com
For sales office addresses, please send an email to: salesaddresses@nexperia.com
Nexperia HEF4541B
Programmable timer
18. Contents
1 General description. . . . . . . . . . . . . . . . . . . . . . 1
2 Features and benefits . . . . . . . . . . . . . . . . . . . . 1
3 Ordering information. . . . . . . . . . . . . . . . . . . . . 1
4 Functional diagram . . . . . . . . . . . . . . . . . . . . . . 2
5 Pinning information. . . . . . . . . . . . . . . . . . . . . . 3
5.1 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
5.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 3
6 Functional description . . . . . . . . . . . . . . . . . . . 4
7 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 4
8 Recommended operating conditions. . . . . . . . 5
9 Static characteristics. . . . . . . . . . . . . . . . . . . . . 5
10 Dynamic characteristics . . . . . . . . . . . . . . . . . . 7
11 Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
12 Application information. . . . . . . . . . . . . . . . . . 10
RC oscillator timing compon ent limitations. . . .10
13 Package outline . . . . . . . . . . . . . . . . . . . . . . . . 12
14 Abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . . 13
15 Revision history. . . . . . . . . . . . . . . . . . . . . . . . 13
16 Legal information. . . . . . . . . . . . . . . . . . . . . . . 14
16.1 Data sheet status . . . . . . . . . . . . . . . . . . . . . . 14
16.2 Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
16.3 Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . 14
16.4 Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 15
17 Contact information. . . . . . . . . . . . . . . . . . . . . 15
18 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
© Nexperia B.V. 2017. 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:
15 December 2015
