TEMIC U2391B

U2391B
Quartz Controlled Pulse Generator
Description
The monolithic integrated bipolar circuit, U2391B, is
designed as a quartz controlled pulse generator. The
tristate input enables the selection of different pulse
period durations. The internal switch-on monitoring
achieves the start up of the IC when the power-on occurs.
The output pulse can supply a drive signal upto 150 mA,
which is short circuit protected.
Features
Application
D
D
D
D
D
D
D
D
Standard quartz fosc = 32.768 kHz
Minimum operating voltage 4.5 V/1.5 mA
Pulse width, tp = 31.25 ms
Power stage with current limitation:
typical 150 mA
Tristate period selection: 1/36/60 s
Reset and disable possibility
Operation with C 33 pF, as operational time
counter possible
Minimum dimensions due to SO-case
Operational time counter
Case: SO8
y
Block Diagram
RL
w 10 x V
S
in Ohm
VS = 4.75 to 14 V
390 W
m
10 F
8
+
60 s
36 s
1s
1
Tristate
2
60
36
1
Selection
logic
Programmable
divider
Pulse former
Switch on
monitoring
1 Hz
16 Hz
Divider 2
4
To test
7
3
Divider 2
7
Oscillator
6
5
m
0.22 F
+
Reset
Divider 2
4
Tristate
Interrupt
Reset
Start with VS
Interrupt
32768 Hz
4
2048 Hz
96 11740
Figure 1. Block diagram with external circuit
TELEFUNKEN Semiconductors
Rev. A1, 30-May-96
1 (7)
U2391B
Pin Description
Pin
1
2
3
4
5, 6
7
8
Symbol
Period
GND
Output
Contr.
Osc.
Test
VS
Function
Period selection input
Ground
Output control pulse
Control input
Quartz-oscillator input
Test logic input/output
Supply voltage
Period
1
8
VS
GND
2
7
Test
Output
3
6
Osc.
Contr.
4
5
Osc.
9611805
Figure 2. Pinning
Description
D An interruption is ignored (Pin 4 =
Pin 1, Period Selection Logic
put pulse time.
Period selection at Pin 1 is as follows:
Pin 1 = open,
s
Pin 1 = ground
= 1 s
Pin 1 = VS (Pin 8), = 60 s
ă) during the out-
D When Pin 4 is switched to VS during the output pulse
time
* this output pulse will be reseated.
Pin 5, 6 Quartz-Oscillator Input
Pin 2, Ground
The propagated period time selection is based on circuit
with a low cost clock quartz of 32.768 kHz.
Pin 3, Output Stage
Output stage, being short circuit protected is limited to a
current value of typical 150 mA. Apart from it, there is a
voltage limitation which controls the power stage at the
rate of V3 28.8 to 32 V and serves as an active Z-diode.
Output pulse width is 31.25 ms when quartz frequency is
32.768 kHz. It is independent of the selected period.
To test the circuit in a reasonable time, it is possible to
control the divider (fo = 16 Hz) at Pin 7 as well as to feed
in a higher frequency to the programmed residual counter
(fi 2 kHz).
Pin 4, Control Logic
Pin 8, Supply Voltage
D Counting delay is typ 1.5 s (maximum 8 s) when Pin 4
An operating voltage of 4.5 V is necessary for the functioning of the circuit, although an internal switch-on
monitoring allows it to operate with a voltage of 3.6 V.
This means that there is sufficient reliability for the performance of the circuit.
The circuit is designed for 12 V 10% with internal supply voltage limitation of typical 15 V. In case of higher
voltages there is a need of a series resistance and buffer
capacitance as shown in figure 1.
w
is open and VS is switched on.
D Programmable residual divider y
1 s is reseated if
Pin 4 is connected to Pin 8. This results in an absolute
tolerance, at the start across “Reset/End” to be 1 s.
v
D Clock input to the 27 divider is inhibited, if Pin 4 is
v
connected to the ground (Pin 2). Absolute tolerance
for every interruption is 0.488 ms.
Pin 7, Test Logic, Figure 2, 3
v
2 (7)
Preliminary Information
"
TELEFUNKEN Semiconductors
Rev. A1, 30-May-96
U2391B
Absolute Maximum Ratings
Reference point Pin 2, unless otherwise specified
Parameters
Supply current
Pin 8
t 10 ms
Supply voltage
Pin 8
without series resistance
Voltages
Selection logic
Pin 1
Control logic
Pin 4
Output stage, without
protection circuit
Pin 3
Currents
Test logic
Pin 7
Oscillator
Pin 5, 6
Output stage
t 1 ms
Pin 3
Power dissipation
Tamb = 45°C
Tamb = 85°C
v
v
Storage temperature range
Ambient temperature range
Junction temperature
Symbol
IS
is
VS
Value
30
150
13.2
Unit
mA
V1
V4
0 to VS
0 to VS
V
V3
28.8
I7
Iosc
I3
± 100
± 100
300
Ptot
270
135
mW
Tstg
Tamb
Tj
–40 to +125
–20 to +100
125
°C
°C
°C
V
mA
mA
mA
Electrical Characteristics
VS = 5 V, Tamb = 25°C, figure 1, reference point Pin 2, unless otherwise specified
Parameters
DC supply currents
Minimum supply voltage
Supply voltage limitation
Voltage monitoring
Turn-on threshold
Turn-off threshold
Temperature coefficient
Selection logic
Control logic
Oscillator
Operating current
Build-up time
Test Conditions / Pins
V8 = 5 V
Pin 8
V8 = 12 V
Pin 8
I8 = 3 mA
Pin 8
I8 = 30 mA
Pin 8
ă
Symbol
IS
Min.
VS
VS
4.5
13.2
VTON
VTOFF
–TC
I1
–I1
I4
–I4
–I4
Pin 1 = (1 s)
Pin 1 = + (60 s)
Pin 4 = 0 V (Interrupt)
Pin 4 = 5 V (Reset)
Reset current
fosc = 32768 Hz, Cosc 33 pF
Pin 5, 6
–Iosc
ton
TELEFUNKEN Semiconductors
Rev. A1, 30-May-96
w
Typ.
1.2
Max.
1.5
2
15
16.3
17.2
3.6
2.4
0.33
6
6
45
135
65
Unit
mA
V
V
V
V
%/K
mA
mA
1500
20
1.5
mA
8
s
3 (7)
U2391B
Parameters
Output stage
Saturation voltages
Test Conditions / Pins
Pin 3
–IO = 100 mA, VS = 12 V
–IO = 75 mA, VS = 12 V
V3 = 2 V
fosc = 32768 Hz
–IO = 1 mA
V3 = 12 V
V8 = 5 V
Pin 8
V8 = 12 V
Current limitation
Output pulse width
Voltage limitation
Reserve current
Drive current
(DI8 during tp)
Symbol
Min.
Typ.
VO
–IO
tp
Vlimit
IO(R)
DI8
100
Max.
Unit
0.5
0.5
220
V
mA
ms
V
mA
mA
31.25
28.8
33
10
4
10
Test Circuit
+5V
110 k W
1
8
BC237
10 mF
BC212
2
7
U2391B
68 k W
6
3
4
5
47 k W
f = 16 Hz
tp
= 1:1
T
fosc= 32768 Hz
96 11741
Figure 3. 16 Hz Test
+5V
60 s
36 s
1s
1
8
2
7 BC237
10 mF
470 W
U2391B
GND
39 k W
Test clock
47 k W
3
6
4
5
0.22 m F
82 k W
BC237
96 11814
GND if Pin 3 = ”1”
Figure 4. Programmed residual counter fi= 2 kHz (Test clock)
4 (7)
Preliminary Information
TELEFUNKEN Semiconductors
Rev. A1, 30-May-96
U2391B
Applications
60 s
36 s
47 W
1
8
2
7
10 mF
1s
U2391B
1N4148
3
6
4
5
0.22 mF
R L >860W
f osc = 32768 Hz
96 11815
GND
V S = 4.75...14 V
Figure 5. Standard circuit for VS = 4.75 to 14 V, without reset and interruption
Cycle duration selected by Pin 1
I s< 6.7 mA
2.2 k W
8
2
7
10 mF
R L >860 W
0.22 mF
1N4148
68 kW
Operation
1
BZX85
C5V1
Reset
U2391B
3
6
4
5
Interrupt
f osc = 32768 Hz
96 11816
GND
V S = 19.2...28.8 V
Figure 6. VS = 24 V ± 20% with reset and interrupt switch,
Cycle time t = 60 sec.
TELEFUNKEN Semiconductors
Rev. A1, 30-May-96
5 (7)
U2391B
Dimensions in mm
Package: SO8
94 8862
6 (7)
Preliminary Information
TELEFUNKEN Semiconductors
Rev. A1, 30-May-96
U2391B
Ozone Depleting Substances Policy Statement
It is the policy of TEMIC TELEFUNKEN microelectronic GmbH to
1. Meet all present and future national and international statutory requirements.
2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems
with respect to their impact on the health and safety of our employees and the public, as well as their impact on
the environment.
It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as
ozone depleting substances ( ODSs).
The Montreal Protocol ( 1987) and its London Amendments ( 1990) intend to severely restrict the use of ODSs and
forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban
on these substances.
TEMIC TELEFUNKEN microelectronic GmbH semiconductor division has been able to use its policy of
continuous improvements to eliminate the use of ODSs listed in the following documents.
1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively
2 . Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental
Protection Agency ( EPA) in the USA
3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C ( transitional substances ) respectively.
TEMIC can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain
such substances.
We reserve the right to make changes to improve technical design and may do so without further notice.
Parameters can vary in different applications. All operating parameters must be validated for each customer
application by the customer. Should the buyer use TEMIC products for any unintended or unauthorized
application, the buyer shall indemnify TEMIC against all claims, costs, damages, and expenses, arising out of,
directly or indirectly, any claim of personal damage, injury or death associated with such unintended or
unauthorized use.
TEMIC TELEFUNKEN microelectronic GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany
Telephone: 49 ( 0 ) 7131 67 2831, Fax number: 49 ( 0 ) 7131 67 2423
TELEFUNKEN Semiconductors
Rev. A1, 30-May-96
7 (7)