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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
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
Application
Operational time counter
Case: SO8
y
Block Diagram
RL
w 10 x V
S
in Ohm 390 W
VS = 4.75 to 14 V
10 F
m
+ 60 s 36 s 1s 1 Tristate 60 36 1 Selection logic
8 Switch on monitoring
1 Hz 16 Hz
Programmable divider
2
Pulse former
Divider 2
4
To test 7
3
Divider 2
7
Oscillator
6 5 32768 Hz
0.22 F + Divider 2 4 Tristate Reset Start with VS Interrupt Reset Interrupt
m
4
2048 Hz
96 11740
Figure 1. Block diagram with external circuit
TELEFUNKEN Semiconductors Rev. A1, 30-May-96
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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 Test Osc.
GND Output
2
7
3
6
Contr.
4
5
Osc.
9611805
Figure 2. Pinning
Description
Pin 1, Period Selection Logic
Period selection at Pin 1 is as follows: Pin 1 = open, t = 36 s Pin 1 = ground t=1s Pin 1 = VS (Pin 8), t = 60 s
D An interruption is ignored (Pin 4 =
put pulse time.
) 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
The propagated period time selection is based on circuit with a low cost clock quartz of 32.768 kHz.
Pin 2, Ground 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.
Pin 7, Test Logic, Figure 2, 3
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).
w
v
Pin 4, Control Logic
Pin 8, Supply Voltage
D Counting delay is typ 1.5 s (maximum 8 s) when Pin 4
is open and VS is switched on.
D Programmable residual divider t
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.
y1
D Clock input to the 27 divider is inhibited, if Pin 4 is
connected to the ground (Pin 2). Absolute tolerance for every interruption is 0.488 ms.
v
v
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.
"
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 = 45C Tamb = 85C Symbol IS is VS Value 30 150 13.2 Unit mA V
v
V1 V4 V3 I7 Iosc I3 Ptot
0 to VS 0 to VS 28.8 100 100 300 270 135 -40 to +125 -20 to +100 125
V
v
mA mA
mA mW C C C
Storage temperature range Ambient temperature range Junction temperature
Tstg Tamb Tj
Electrical Characteristics
VS = 5 V, Tamb = 25C, 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 Test Conditions / Pins V8 = 5 V Pin 8 V8 = 12 V Pin 8 I8 = 3 mA Pin 8 I8 = 30 mA Pin 8 Symbol IS VS VS Min. Typ. 1.2 Max. 1.5 2 16.3 17.2 Unit mA V V
4.5 13.2
15
Oscillator Operating current Build-up time
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
w
VTON VTOFF -TC I1 -I1 I4 -I4 -I4
3.6 2.4 0.33 6 6 45 135 65 20 1.5 1500
V V %/K
mA mA
mA
8 s
TELEFUNKEN Semiconductors Rev. A1, 30-May-96
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U2391B
Parameters Output stage Saturation voltages Current limitation Output pulse width Voltage limitation Reserve current Drive current (DI8 during tp) 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 Symbol VO -IO tp Vlimit IO(R) DI8 100 31.25 28.8 4 10 33 10 Min. Typ. Max. 0.5 0.5 220 Unit V mA ms V
mA
mA
Test Circuit
110 k W 1 10 mF 2 7 8 BC237 BC212 +5V
U2391B
3 6 68 k W 47 k W f = 16 Hz tp = 1:1 T
4
96 11741
5
fosc= 32768 Hz
Figure 3. 16 Hz Test
60 s 36 s 1s 470 W GND 3 0.22 m F 4
96 11814
+5V 1 10 mF 2 7 BC237 8 39 kW Test clock 47 kW 6 82 k W BC237
U2391B
5
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 1s 47W 1N4148 3 0.22 mF R L >860W 4
96 11815
1 10 mF 2
8
7
U2391B
6
5
f osc = 32768 Hz
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 kW R L >860W 1N4148 10 mF 2 0.22 mF BZX85 C5V1 3 7 1 8
U2391B
6
68 kW Operation
Reset Interrupt
4
96 11816
5
f osc = 32768 Hz
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
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