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Intersil Electronic Components Datasheet

ICM7555 Datasheet

General Purpose Timers

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ICM7555 pdf
DATASHEET
General Purpose Timers
ICM7555, ICM7556
The ICM7555 and ICM7556 are CMOS RC timers providing
significantly improved performance over the standard
SE/NE 555/556 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 555/556 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.
Pin Configurations
ICM7555
(8 LD PDIP, SOIC)
TOP VIEW
GND 1
TRIGGER 2
OUTPUT 3
RESET 4
8 VDD
7 DISCHARGE
6 THRESHOLD
5
CONTROL
VOLTAGE
Features
• Exact equivalent in most cases for SE/NE 555/556 or
TLC555/556
• Low supply current
- ICM7555 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60µA
- ICM7556 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120µA
• 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 555/556 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, HIGH and LOW
• Pb-free (RoHS Compliant)
Applications
• Precision timing
• Pulse generation
• Sequential timing
• Time delay generation
• Pulse width modulation
• Pulse position modulation
• Missing pulse detector
ICM7556
(14 LD PDIP, CERDIP)
TOP VIEW
DISCHARGE1 1
THRESHOLD1 2
CONTROL
VOLTAGE1
3
RESET1 4
OUTPUT1 5
TRIGGER1 6
GND 7
14 VDD
13 DISCHARGE2
12 THRESHOLD2
11
CONTROL
VOLTAGE2
10 RESET2
9 OUTPUT2
8 TRIGGER2
June 28, 2016
FN2867.10
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2002, 2004-2006, 2016. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.



Intersil Electronic Components Datasheet

ICM7555 Datasheet

General Purpose Timers

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ICM7555 pdf
ICM7555, ICM7556
Ordering Information
PART NUMBER
PART MARKING
TEMP. RANGE
(°C)
TAPE AND REEL
(UNITS)
PACKAGE
(RoHS COMPLIANT)
PKG. DWG. #
ICM7555CBAZ (Notes 2, 3)
7555 CBAZ
0 to +70
8 Ld SOIC
M8.15
ICM7555CBAZ-T (Notes 1, 2, 3) 7555 CBAZ
0 to +70
2.5k
8 Ld SOIC (Tape and Reel) M8.15
ICM7555IBAZ (Notes 2, 3)
7555 IBAZ
-25 to +85
8 Ld SOIC
M8.15
ICM7555IBAZ-T (Notes 1, 2, 3)
7555 IBAZ
-25 to +85
2.5k
8 Ld SOIC (Tape and Reel) M8.15
ICM7555IPAZ (Notes 2, 3)
7555 IPAZ
-25 to +85
8 Ld PDIP
E8.3
ICM7556IPDZ (Notes 2, 3)
ICM7556IPDZ
-25 to +85
14 Ld PDIP
E14.3
ICM7556MJD
ICM7556MJD
(No longer available or supported)
-55 to +125
14 Ld Cerdip
F14.3
NOTES:
1. Please refer to TB347 for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte
tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil
Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
3. For Moisture Sensitivity Level (MSL), please see product information page for ICM7555, ICM7556. For more information on MSL, please see tech brief
TB363.
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Intersil Electronic Components Datasheet

ICM7555 Datasheet

General Purpose Timers

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ICM7555 pdf
ICM7555, ICM7556
Absolute Maximum Ratings
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +18V
Input Voltage
Trigger, Control Voltage, Threshold,
Reset (Note 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V+ +0.3V to GND -0.3V
Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100mA
Operating Conditions
Temperature Range
ICM7555C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to +70°C
ICM7555I, ICM7556I . . . . . . . . . . . . . . . . . . . . . . . . . . . . -25°C to +85°C
ICM7556M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-55°C to +125°C
Thermal Information
Thermal Resistance (Typical, Notes 5, 6) JA (°C/W) JC (°C/W)
14 Ld CERDIP Package . . . . . . . . . . . . . . .
80
24
14 Ld PDIP Package* . . . . . . . . . . . . . . . . 115
46
8 Ld PDIP Package* . . . . . . . . . . . . . . . . . 130
69
8 Ld SOIC Package. . . . . . . . . . . . . . . . . . . 170
67
Maximum Junction Temperature (Hermetic Package) . . . . . . . . . . . .+175°C
Maximum Junction Temperature (Plastic Package) . . . . . . . . . . . .+150°C
Maximum Storage Temperature Range . . . . . . . . . . . . . -65°C to +150°C
* Pb-free PDIPs can be used for through-hole wave solder
processing only. They are not intended for use in Reflow solder
processing applications.
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product
reliability and result in failures not covered by warranty.
NOTES:
4. Due to the SCR structure inherent in the CMOS process used to fabricate these devices, connecting any terminal to a voltage greater than V+ +0.3V
or less than V- -0.3V may cause destructive latch-up. For this reason it is recommended that no inputs from external sources not operating from the
same power supply be applied to the device before its power supply is established. In multiple supply systems, the supply of the ICM7555 and
ICM7556 must be turned on first.
5. JA is measured with the component mounted on a low effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
6. For JC, the “case temp” location is taken at the package top center.
Electrical Specifications Applies to ICM7555 and ICM7556, unless otherwise specified.
PARAMETER
Static Supply Current
Monostable Timing Accuracy
SYMBOL
IDD
TEST CONDITIONS
ICM7555 VDD = 5V
VDD = 15V
ICM7556 VDD = 5V
VDD = 15V
RA = 10k, C = 0.1µF, VDD = 5V
TA = +25°C
MIN TYP MAX
40 200
60 300
80 400
120 600
2
Drift with Temperature
(Note 7)
Drift with Supply (Note 7)
Astable Timing Accuracy
VDD = 5V
VDD = 10V
VDD = 15V
VDD = 5V to 15V
RA = RB = 10k, C = 0.1µF, VDD = 5V
0.5
2
Drift with Temperature
(Note 7)
Drift with Supply (Note 7)
Threshold Voltage
Trigger Voltage
Trigger Current
Threshold Current
Control Voltage
VTH
VTRIG
ITRIG
ITH
VCV
VDD = 5V
VDD = 10V
VDD = 15V
VDD = 5V to 15V
VDD = 15V
VDD = 15V
VDD = 15V
VDD = 15V
VDD = 15V
0.5
62 67 71
28 32 36
10
10
62 67 71
(Note 8)
-55°C TO+125°C
MIN TYP MAX UNIT
300 µA
300 µA
600 µA
600 µA
%
858 1161 µs
150 ppm/°C
200 ppm/°C
250 ppm/°C
0.5 %/V
%
1717
2323 µs
150 ppm/°C
200 ppm/°C
250 ppm/°C
0.5 %/V
61 72 % VDD
27 37 % VDD
50 nA
50 nA
61 72 % VDD
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3
FN2867.10
June 28, 2016




Part Number ICM7555
Description General Purpose Timers
Maker Intersil Corporation
Total Page 13 Pages
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