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ALD1502DA PDF预览

ALD1502DA

更新时间: 2024-10-27 22:47:47
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描述
SINGLE/DUAL PRECISION HIGH SPEED MICROPOWER TIMER

ALD1502DA 数据手册

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A
L
D
DVANCED  
INEAR  
EVICES, INC.  
ALD1502/ALD2502  
SINGLE/DUAL PRECISION HIGH SPEED MICROPOWER TIMER  
GENERAL DESCRIPTION  
APPLICATIONS  
The ALD1502/ALD2502 timers are high performance single/dual mono-  
lithic timing circuits built with advanced silicon gate CMOS technology.  
They offer the benefits of high input impedance, thereby allowing smaller  
timing capacitors and a longer timing cycle; high speed, with typical cycle  
time of 400ns; low power dissipation for battery operated environment;  
reduced supply current spikes, allowing smaller and lower cost decoupling  
capacitors.  
High speed one-shot (monostable)  
pulse generation  
• Precision timing  
• Sequential timing  
• Long delay timer  
• Pulse width and pulse position  
modulation  
• Missing pulse detector  
• Frequency divider  
• Synchronized timer  
Each timer is capable of producing accurate time delays and oscillations in  
both monostable and astable operation, and operates in the one-shot  
(monostable) mode or 50% duty cycle free running oscillation mode with a  
single resistor and one capacitor. The inputs and outputs are fully  
compatible with CMOS, NMOS or TTL logic.  
PIN CONFIGURATION  
There are three matched internal resistors (approximately 200Keach)  
that set the threshold and trigger levels at two-thirds and one-third respec-  
tively of V . These levels can be adjusted by using the control terminal.  
+
V
GND  
TRIG  
OUT  
RST  
1
2
3
8
7
6
5
+
DISC  
When the trigger input is below the trigger level, the output is in the high  
state and sourcing 2mA. When the threshold input is above the threshold  
levelatthesametimethetriggerinputisabovethetriggerlevel, theinternal  
flip-flopisreset, theoutputgoestothelowstateandsinksupto10mA. The  
resetinputoverridesallotherinputsandwhenitisactive(resetvoltageless  
than 1V), the output is in the low state.  
THRES  
CONT  
4
TOP VIEW  
DA, PA, SA PACKAGE  
+
1
14  
V
DSC  
1
1
1
FEATURES  
THRES  
2
3
4
13 DSC  
2
• High speed operation -- 2.5MHz typical oscillation at 5V  
• High discharge sinking current of 80mA at 5V  
• Guaranteed low operating supply voltage of 2V to 12V  
• Functional equivalent to and same pin-out as NE555/NE556  
with greatly expanded high and low frequency ranges  
• High speed, low power, monolithic CMOS technology  
• Low supply current 50µA typical for ALD1502  
and100µA typical for ALD2502  
CONT  
RST  
12 THRES  
2
11  
10  
9
CONT  
1
2
5
6
7
OUT  
RST  
2
1
OUT  
TRIG  
2
1
8
GND  
TRIG  
2
TOP VIEW  
DB, PB, SB PACKAGE  
• Extremely low trigger, threshold and reset currents 10pA typical  
• Operates in both monostable and astable modes  
• Fixed 50% duty cycle or adjustable duty cycle  
• CMOS, NMOS and TTL compatible input/output  
• Low supply current spikes  
BLOCK DIAGRAM (EACH TIMER)  
+
V
(8)  
RESET  
(4)  
ORDERING INFORMATION  
Operating Temperature Range *  
THRESHOLD  
(6)  
R
S
R
R
-55°C to +125°C  
0°C to +70°C  
0°C to +70°C  
CONTROL  
(5)  
OUTPUT  
(3)  
8-Pin  
8-Pin Small Outline 8-Pin Plastic Dip  
DISCHARGE  
(7)  
CERDIP Package  
ALD1502 DA  
Package (SOIC)  
ALD1502 SA  
Package  
ALD1502PA  
TRIGGER  
(2)  
R
14-Pin  
14-Pin Small Outline 14-Pin Plastic Dip  
CERDIP Package  
ALD2502 DB  
Package (SOIC)  
ALD2502 SB  
Package  
ALD2502 PB  
GND  
(1)  
* Contact factory for industrial temperature range  
© 1998 Advanced Linear Devices, Inc. 415Tasman Drive, Sunnyvale, California 94089 -1706 Tel: (408) 747-1155 Fax: (408) 747-1286 http://www.aldinc.com  

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