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Details, datasheet, quote on part number:XICM7555CCU
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Philips Semiconductors Linear Products
Product specification
General purpose CMOS timer
ICM7555
DESCRIPTION
The ICM7555 is a CMOS timer providing significantly improved performance over the standard NE/SE555 timer, while at the same time being a direct replacement 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. The ICM7555 is a stable controller capable of producing accurate time delays or frequencies. 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 bipolar 555 device, the CONTROL VOLTAGE terminal need not be decoupled with a capacitor. The TRIGGER and RESET inputs are active low. The output inverter can source or sink currents large enough to drive TTL loads or provide minimal offsets to drive CMOS loads.
PIN CONFIGURATION
D and N Packages
GND 1
TRIGGER OUTPUT 2 3 8 7 6 5 V DD DISCHARGE THRESHOLD CONTROL VOLTAGE
RESET 4
· Timing from microseconds through hours · Operates in both astable and monostable modes · Adjustable duty cycle · High output source/sink driver can drive TTL/CMOS · Typical temperature stability of 0.005%/oC at 25°C · Rail-to-rail outputs
APPLICATIONS
FEATURES
· Exact equivalent in most applications for NE/SE555 · Low supply current: 80µA (typ) · Extremely low trigger, threshold, and reset currents: 20pA (typ) · High-speed operation: 500kHz guaranteed · Wide operating supply voltage range guaranteed 3 to 16V over full
automotive temperatures
· Normal reset function; no crowbarring of supply during output
transition
· Precision timing · Pulse generation · Sequential timing · Time delay generation · Pulse width modulation · Pulse position modulation · Missing pulse detector
· Can be used with higher-impedance timing elements than the
bipolar 555 for longer time constants
ORDERING INFORMATION
DESCRIPTION 8-Pin Plastic Dual In-Line Package (DIP) 8-Pin Plastic Small Outline (SO) Package 8-Pin Plastic Dual In-Line Package (DIP) 8-Pin Plastic Small Outline (SO) Package TEMPERATURE RANGE 0 to +70°C 0 to +70°C -40 to +85°C -40 to +85°C ORDER CODE ICM7555CN ICM7555CD ICM7555IN ICM7555ID DWG # 0404B 0174C 0404B 0174C
August 31, 1994
337
853-1192 13721
Philips Semiconductors Linear Products
Product specification
General purpose CMOS timer
ICM7555
EQUIVALENT BLOCK DIAGRAM
FLIPFLOP VDD 8 R 6 5 R COMPARATOR A + OUTPUT DRIVERS 3 RESET 4
THRESHOLD CONTROL VOLTAGE
OUTPUT
DISCHARGE COMPARATOR B + 7 N 1
2 TRIGGER R
1 NOTE: UNUSED INPUTS SHOULD BE CONNECTED TO APPROPRIATE VOLTAGE FROM TRUTH TABLE.
TRUTH TABLE
THRESHOLD VOLTAGE DON'T CARE >2/3(V+) VTH 1/3(V+) VTR > 1/3 <1/3(V+) RESET1 LOW HIGH HIGH HIGH OUTPUT LOW LOW STABLE HIGH DISCHARGE SWITCH ON ON STABLE OFF
NOTES: 1. RESET will dominate all other inputs: TRIGGER will dominate over THRESHOLD.
ABSOLUTE MAXIMUM RATINGS1
SYMBOL VDD VTRIG1 VCV VTH VRST IOUT PDMAX Supply voltage Trigger input voltage Control voltage Threshold input voltage RESET input voltage Output current Maximum power dissipation, TA = 25°C (still air)2 N package D package TSTG TSOLD Storage temperature range Lead temperature (Soldering 60s) 1160 780 -65 to +150 300 mW mW 100 mA > -0.3 to
°C °C
NOTES: 1. Due to the SCR structure inherent in the CMOS process used to fabricate these devices, connecting any terminal to a voltage greater than VDD + 0.3V or less than GND -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 systems, the supply of the ICM7555 must be turned on first. 2. Derate above 25°C, at the following rates: N package at 9.3mW/°C D package at 6.2mW/°C 3. See "Power Dissipation Considerations" section.
August 31, 1994
338
Philips Semiconductors Linear Products
Product specification
General purpose CMOS timer
ICM7555
DC AND AC ELECTRICAL CHARACTERISTICS
TA = 25°C unless otherwise specified. SYMBOL VDD IDD LIMITS PARAMETER Supply voltage Supply current1 Astable mode timing2 Initial accuracy Drift with supply voltage Drift with temperature3 TEST CONDITIONS MIN TMIN < TA < TMAX VDD = VMIN VDD = VMAX RA, RB = 1k to 100k, C = 0.1µF 5V
µA µA
VTH VTRIG ITRIG
Threshold voltage Trigger voltage Trigger current
ITH
Threshold current
IRST VRST VCV VOL VOH VDIS tR tF FMAX
Reset current Reset voltage Control voltage Output voltage (low) Output voltage (high) Discharge output voltage Rise time of output3 Fall time of output3 Maximum oscillator frequency (astable mode)
VDD = 5V, IDIS = 10.0mA RL = 10M, CL = 10pF, VDD = 5V RL = 10M, CL = 10pF, VDD = 5V
NOTES: 1. The supply current value is essentially independent of the TRIGGER, THRESHOLD, and RESET voltages. 1.38 . The components are defined in Figure 2. 2. Astable timing is calculated using the following equation: f = (RA + 2RB)C 3. Parameter is not 100% tested.
August 31, 1994
339
Philips Semiconductors Linear Products
Product specification
General purpose CMOS timer
ICM7555
TYPICAL PERFORMANCE CHARACTERISTICS
225 200 TA = 55°C 175 SUPPLY CURRENT (I D ) ( µ A) D 150 TA = +25°C 125 100 75 50 25 0 0 5 10 SUPPLY VOLTAGE (VDD) 15 20 TA = +125°C
Supply Current vs Supply Voltage
100.0 TA = +25°C
OUTPUT SOURCE CURRENT 9mA)
VDD = 18V 10.0 VDD = 5V
1.0
VDD = 2V
0.1 0.1 1.0 VDD VOUT (V) 10.0
High Output Voltage Drop vs Output Source Current
August 31, 1994
340
Philips Semiconductors Linear Products
Product specification
General purpose CMOS timer
ICM7555
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
100.0 VDD = 18V DISCHARGE CURRENT (mA) TA = 25°C
VDD = 5V 10.0
VDD = 2V
1.0
0.1 0.1 1.0 DISCHARGE VOLTAGE (V) 10.0
Discharge Low Output Voltage vs Discharge Sink Current
100.0 TA = +125°C
OUTPUT CURRENT (mA)
10.0
VDD = 18V
VDD = 5V
1.0 VDD = 2V
0.1 0.1 1.0 OUTPUT VOLTAGE (V) 10.0
Low Output Voltage vs Output Sink Current
August 31, 1994
341
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