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參數資料
| 型號： | ICM7556 |
| 廠商： | Intersil Corporation |
| 英文描述： | General Purpose Timers(通用定時器) |
| 中文描述： | 低功耗、通用定時器 |
| 文件頁數： | 1/12頁 |
| 文件大小： | 287K |
| 代理商： | ICM7556 |
1
FN2867.9
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2002, 2004, 2005, 2006. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
ICM7555, ICM7556
General Purpose Timers
The ICM7555 and ICM7556 are CMOS RC timers providing
significantly improved performance over the standard
SE/NE 555/6 and 355 timers, while at the same time being
direct replacements for those devices in most applications.
Improved parameters include low supply current, wide
operating supply voltage range, low THRESHOLD,
TRIGGER and RESET currents, no crowbarring of the
supply current during output transitions, higher frequency
performance and no requirement to decouple CONTROL
VOLTAGE for stable operation.
Specifically, the ICM7555 and ICM7556 are stable
controllers capable of producing accurate time delays or
frequencies. The ICM7556 is a dual ICM7555, with the two
timers operating independently of each other, sharing only
V+ and GND. In the one shot mode, the pulse width of each
circuit is precisely controlled by one external resistor and
capacitor. For astable operation as an oscillator, the free
running frequency and the duty cycle are both accurately
controlled by two external resistors and one capacitor. Unlike
the regular bipolar SE/NE 555/6 devices, the CONTROL
VOLTAGE terminal need not be decoupled with a capacitor.
The circuits are triggered and reset on falling (negative)
waveforms, and the output inverter can source or sink
currents large enough to drive TTL loads, or provide minimal
offsets to drive CMOS loads.
Features
Exact Equivalent in Most Cases for SE/NE555/556 or
TLC555/556
Low Supply Current
- ICM7555. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
μ
A
- ICM7556. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
μ
A
Extremely Low Input Currents . . . . . . . . . . . . . . . . . 20pA
High Speed Operation . . . . . . . . . . . . . . . . . . . . . . . 1MHz
Guaranteed Supply Voltage Range . . . . . . . . . 2V to 18V
Temperature Stability . . . . . . . . . . . . 0.005%/°C at +25°C
Normal Reset Function - No Crowbarring of Supply During
Output Transition
Can be Used with Higher Impedance Timing Elements
than Regular 555/6 for Longer RC Time Constants
Timing from Microseconds through Hours
Operates in Both Astable and Monostable Modes
Adjustable Duty Cycle
High Output Source/Sink Driver can Drive TTL/CMOS
Outputs have Very Low Offsets, HI and LO
Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
Precision Timing
Pulse Generation
Sequential Timing
Time Delay Generation
Pulse Width Modulation
Pulse Position Modulation
Missing Pulse Detector
Pinouts
ICM7555 (8 LD PDIP, SOIC)
TOP VIEW
ICM7556 (14 LD PDIP, CERDIP)
TOP VIEW
GND
TRIGGER
OUTPUT
RESET
1
2
3
4
8
7
6
5
V
DD
DISCHARGE
THRESHOLD
CONTROL
VOLTAGE
DISCHARGE
THRESH-
CONTROL
VOLTAGE
RESET
OUTPUT
TRIGGER
GND
V
DD
DISCHARGE
THRESHOLD
CONTROL
VOLTAGE
RESET
OUTPUT
TRIGGER
1
2
3
4
5
6
7
14
13
12
11
10
9
8
OLD
Data Sheet
August 24, 2006
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