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TLC555MJGB

Part # TLC555MJGB
Description IC, LOW POWER TIMER - Rail/Tube
Category Microcircuit
Availability Out of Stock
Qty 0
Qty Price
1 + $4.78750

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Technical Document


DISCLAIMER: The information provided herein is solely for informational purposes. Customers must be aware of the suitability of this product for their application, and consider that variable factors such as Manufacturer, Product Category, Date Codes, Pictures and Descriptions may differ from available inventory.


 
SLFS043F − SEPTEMBER 1983 − REVISED FEBRUARY 2005
10
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION
Connecting TRIG to THRES, as shown in Figure 3, causes the timer to run as a multivibrator. The capacitor C
T
charges through R
A
and R
B
to the threshold voltage level (approximately 0.67 V
DD
) and then discharges through R
B
only to the value of the trigger voltage level (approximately 0.33 V
DD
). The output is high during the charging cycle
(t
c(H)
) and low during the discharge cycle (t
c(L)
). The duty cycle is controlled by the values of R
A
, R
B
, and C
T
as shown
in the equations below.
t
c(H)
[ C
T
(R
A
) R
B
)In2 (In2 + 0.693)
t
c(L)
[ C
T
R
B
In 2
Period + t
c(H)
) t
c(L)
[ C
T
(R
A
) 2R
B
)In2
Output driver duty cycle +
t
c(L)
t
c(H)
) t
c(L)
[ 1–
R
B
R
A
) 2R
B
Output waveform duty cycle +
t
c(H)
t
c(H)
) t
c(L)
[
R
B
R
A
) 2R
B
The 0.1-µF capacitor at CONT in Figure 3 decreases the period by about 10%.
The formulas shown above do not allow for any propagation delay times from the TRIG and THRES inputs to DISCH.
These delay times add directly to the period and create differences between calculated and actual values that
increase with frequency. In addition, the internal on-state resistance r
on
during discharge adds to R
B
to provide
another source of timing error in the calculation when R
B
is very low or r
on
is very high.
The equations below provide better agreement with measured values.
t
c(H)
+ C
T
(R
A
) R
B
)In
ƪ
3–expǒ
–t
PLH
C
T
(R
B
) r
on
)
Ǔ
ƫ
) t
PHL
t
c(L)
+ C
T
(R
B
) r
on
)In
ƪ
3–expǒ
–t
PHL
C
T
(R
A
) R
B
)
Ǔ
ƫ
) t
PLH
These equations and those given earlier are similar in that a time constant is multiplied by the logarithm of a number
or function. The limit values of the logarithmic terms must be between In 2 at low frequencies and In 3 at extremely
high frequencies. For a duty cycle close to 50%, an appropriate constant for the logarithmic terms can be substituted
with good results. Duty cycles less than 50%
t
c(H)
t
c(H)
) t
c(L)
require that
t
c(H)
t
c(L)
<1 and possibly R
A
≤ r
on
. These
conditions can be difficult to obtain.
In monostable applications, the trip point on TRIG can be set by a voltage applied to CONT. An input voltage between
10% and 80% of the supply voltage from a resistor divider with at least 500-µA bias provides good results.
PACKAGING INFORMATION
Orderable Device Status
(1)
Package
Type
Package
Drawing
Pins Package
Qty
Eco Plan
(2)
Lead/Ball Finish MSL Peak Temp
(3)
5962-89503012A ACTIVE LCCC FK 20 1 TBD POST-PLATE Level-NC-NC-NC
5962-8950301PA ACTIVE CDIP JG 8 1 TBD A42 SNPB Level-NC-NC-NC
TLC555CD ACTIVE SOIC D 8 75 Green (RoHS &
no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM
TLC555CDG4 ACTIVE SOIC D 8 75 Green (RoHS &
no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM
TLC555CDR ACTIVE SOIC D 8 2500 Green (RoHS &
no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM
TLC555CDRG4 ACTIVE SOIC D 8 2500 Green (RoHS &
no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM
TLC555CP ACTIVE PDIP P 8 50 Pb-Free
(RoHS)
CU NIPDAU Level-NC-NC-NC
TLC555CPE4 ACTIVE PDIP P 8 50 Pb-Free
(RoHS)
CU NIPDAU Level-NC-NC-NC
TLC555CPSR ACTIVE SO PS 8 2000 Pb-Free
(RoHS)
CU NIPDAU Level-2-260C-1YEAR/
Level-1-220C-UNLIM
TLC555CPW ACTIVE TSSOP PW 14 90 Green (RoHS &
no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM
TLC555CPWG4 ACTIVE TSSOP PW 14 90 Green (RoHS &
no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM
TLC555CPWR ACTIVE TSSOP PW 14 2000 Green (RoHS &
no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM
TLC555CPWRG4 ACTIVE TSSOP PW 14 2000 Green (RoHS &
no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM
TLC555ID ACTIVE SOIC D 8 75 Green (RoHS &
no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM
TLC555IDG4 ACTIVE SOIC D 8 75 Green (RoHS &
no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM
TLC555IDR ACTIVE SOIC D 8 2500 Green (RoHS &
no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM
TLC555IDRG4 ACTIVE SOIC D 8 2500 Green (RoHS &
no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM
TLC555IP ACTIVE PDIP P 8 50 Pb-Free
(RoHS)
CU NIPDAU Level-NC-NC-NC
TLC555IPE4 ACTIVE PDIP P 8 50 Pb-Free
(RoHS)
CU NIPDAU Level-NC-NC-NC
TLC555MFKB ACTIVE LCCC FK 20 1 TBD POST-PLATE Level-NC-NC-NC
TLC555MJG ACTIVE CDIP JG 8 1 TBD A42 SNPB Level-NC-NC-NC
TLC555MJGB ACTIVE CDIP JG 8 1 TBD A42 SNPB Level-NC-NC-NC
TLC555MP OBSOLETE PDIP P 8 TBD Call TI Call TI
TLC555QDR ACTIVE SOIC D 8 2500 TBD CU NIPDAU Level-1-220C-UNLIM
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in
a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
PACKAGE OPTION ADDENDUM
www.ti.com
24-Oct-2005
Addendum-Page 1
(2)
Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS) or Green (RoHS & no Sb/Br) - please check
http://www.ti.com/productcontent for the latest availability information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements
for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame
retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder
temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is
provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the
accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take
reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on
incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited
information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI
to Customer on an annual basis.
PACKAGE OPTION ADDENDUM
www.ti.com
24-Oct-2005
Addendum-Page 2
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