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PDF ICM7249 Data sheet ( Hoja de datos )
| Número de pieza | ICM7249 | |
| Descripción | Micro-Power Event/Hour Meter | |
| Fabricantes | Intersil Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ICM7249 (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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ICM7249
August 1997
51/2 Digit LCD,
Micro-Power Event/Hour Meter
Features
Description
• Hour Meter Requires Only 4 Parts Total
• Micropower Operation: < 1µA at 2.8V (Typ)
• 10 Year Operation On One Lithium Cell. 21/2 Year
Battery Life with Display Connected
• Directly Drives 51/2 Digit LCD
• 14 Programmable Modes of Operation
• Times Hrs., 0.1 Hrs., 0.01 Hrs., 0.1 Mins.
• Counts 1’s, 10’s, 100’s, 1000’s
• Dual Function Input Circuit
- Selectable Debounce for Counter
- High-Pass Filter for Timer
• Direct AC Line Triggering with Input Resistor
• Winking “Timer Active” Display Output
• Display Test Feature
Applications
• AC or DC Hour Meters
• AC or DC Totalizers
• Portable Battery Powered Equipment
• Long Range Service Meters
Ordering Information
TEMP.
PART NUMBER RANGE (oC)
PACKAGE
ICM7249IPM
-20 to 85 48 Ld PDIP
PKG.
NO.
E48.6
The ICM7249 Timer/Counter is intended for long-term
battery-supported industrial applications. The ICM7249
typically draws 1µA during active timing or counting, due to
Intersil’ special low-power design techniques. This allows
more than 10 years of continuous operation without battery
replacement. The chip offers four timing modes, eight
counting modes and four test modes.
The ICM7249 is a 48 lead device, powered by a single DC
voltage source and controlled by a 32.768kHz quartz crystal.
No other external components are required. Inputs to the
chip are TTL-compatible and outputs drive standard direct
drive LCD segments.
Pinout
b6/c6 1
f5 2
g5 3
e5 4
d5 5
c5 6
b5 7
a5 8
f4 9
g4 10
e4 11
d4 12
c4 13
b4 14
a4 15
f3 16
g3 17
e3 18
d3 19
c3 20
b3 21
a3 22
f2 23
g2 24
ICM7249
(PDIP)
TOP VIEW
48 DT
47 S/S
46 C3
45 C2
44 C1
43 C0
42 GND
41 OSC OUTPUT
40 OSC INPUT
39 VDD
38 BP
37 W
36 a1
35 b1
34 c1
33 d1
32 e1
31 g1
30 f1
29 a2
28 b2
27 c2
26 d2
25 e2
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999
9-23
File Number 3170.1
1 page  
Timing Waveforms (Continued)
S/S
ICM7249
TIMING ACTIVE
BP
W
ON
SEGMENTS
OFF
SEGMENTS
1
WINK GOES IN PHASE
16 17
WINK GOES OUT PHASE
FIGURE 3. WINK WAVEFORMS IN TIMING MODES
COUNT WITH OR WITHOUT DEBOUNCE
S/S VALID
S/S INVALID
S/S VALID
tDE > 12.5ms
tDE
COUNT WITHOUT DEBOUNCE
UNKNOWN RESULTS WITH DEBOUNCE
10ms < tDE < 12.5ms
40Hz < f < 50Hz
tDE
COUNT WITHOUT DEBOUNCE
ONE COUNT WITH DEBOUNCE
5µs ≤ tDE ≤ 10ms
50Hz ≤ f ≤ 120kHz
FIGURE 4. START/STOP INPUT DEBOUNCE FILTERING IN COUNTING MODES
S/S
BP
15
W
16 17
WINK GOES IN PHASE
32 1 2
WINK GOES OUT PHASE
FIGURE 5. WINK WAVEFORMS IN COUNTING MODES
9-27
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet ICM7249.PDF ] | |
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