Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

TLC3702MDG4 Datasheet(PDF) 8 Page - Texas Instruments

Click here to check the latest version.
Part # TLC3702MDG4
Description  DUAL MICROPOWER LinCMOS VOLTAGE COMPARATORS
Download  36 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TLC3702MDG4 Datasheet(HTML) 8 Page - Texas Instruments

Back Button TLC3702MDG4 Datasheet HTML 4Page - Texas Instruments TLC3702MDG4 Datasheet HTML 5Page - Texas Instruments TLC3702MDG4 Datasheet HTML 6Page - Texas Instruments TLC3702MDG4 Datasheet HTML 7Page - Texas Instruments TLC3702MDG4 Datasheet HTML 8Page - Texas Instruments TLC3702MDG4 Datasheet HTML 9Page - Texas Instruments TLC3702MDG4 Datasheet HTML 10Page - Texas Instruments TLC3702MDG4 Datasheet HTML 11Page - Texas Instruments TLC3702MDG4 Datasheet HTML 12Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 8 / 36 page
background image
TLC3702
DUAL MICROPOWER LinCMOS
™ VOLTAGE COMPARATORS
SLCS013E − NOVEMBER 1986 − REVISED MARCH 2012
8
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
input protection circuit operation
Texas Instruments patented protection circuitry allows for both positive- and negative-going ESD transients.
These transients are characterized by extremely fast rise times and usually low energies, and can occur both
when the device has all pins open and when it is installed in a circuit.
positive ESD transients
Initial positive charged energy is shunted through Q1 to VSS. Q1 turns on when the voltage at the input rises
above the voltage on the VDD pin by a value equal to the VBE of Q1. The base current increases through R2
with input current as Q1 saturates. The base current through R2 forces the voltage at the drain and gate of Q2
to exceed its threshold level (VT ∼ 22 to 26 V) and turn Q2 on. The shunted input current through Q1 to VSS is
now shunted through the n-channel enhancement-type MOSFET Q2 to VSS. If the voltage on the input pin
continues to rise, the breakdown voltage of the zener diode D3 is exceeded and all remaining energy is
dissipated in R1 and D3. The breakdown voltage of D3 is designed to be 24 V to 27 V, which is well below the
gate-oxide voltage of the circuit to be protected.
negative ESD transients
The negative charged ESD transients are shunted directly through D1. Additional energy is dissipated in R1
and D2 as D2 becomes forward biased. The voltage seen by the protected circuit is −0.3 V to −1 V (the forward
voltage of D1 and D2).
circuit-design considerations
LinCMOS™ products are being used in actual circuit environments that have input voltages that exceed the
recommended common-mode input voltage range and activate the input protection circuit. Even under normal
operation, these conditions occur during circuit power up or power down, and in many cases, when the device
is being used for a signal conditioning function. The input voltages can exceed VICR and not damage the device
only if the inputs are current limited. The recommended current limit shown on most product data sheets is
±5 mA. Figure 2 and Figure 3 show typical characteristics for input voltage versus input current.
Normal operation and correct output state can be expected even when the input voltage exceeds the positive
supply voltage. Again, the input current should be externally limited even though internal positive current limiting
is achieved in the input protection circuit by the action of Q1. When Q1 is on, it saturates and limits the current
to approximately 5-mA collector current by design. When saturated, Q1 base current increases with input
current. This base current is forced into the VDD pin and into the device IDD or the VDD supply through R2
producing the current limiting effects shown in Figure 2. This internal limiting lasts only as long as the input
voltage is below the VT of Q2.
When the input voltage exceeds the negative supply voltage, normal operation is affected and output voltage
states may not be correct. Also, the isolation between channels of multiple devices (duals and quads) can be
severely affected. External current limiting must be used since this current is directly shunted by D1 and D2 and
no internal limiting is achieved. If normal output voltage states are required, an external input voltage clamp is
required (see Figure 4).


Similar Part No. - TLC3702MDG4

ManufacturerPart #DatasheetDescription
logo
Texas Instruments
TLC3702MDG4 TI1-TLC3702MDG4 Datasheet
1Mb / 38P
[Old version datasheet]   DUAL MICROPOWER LinCMOS VOLTAGE COMPARATORS
TLC3702MDG4 TI-TLC3702MDG4 Datasheet
1Mb / 39P
[Old version datasheet]   DUAL MICROPOWER LinCMOS??VOLTAGE COMPARATORS
More results

Similar Description - TLC3702MDG4

ManufacturerPart #DatasheetDescription
logo
Texas Instruments
TLC3702-Q1 TI1-TLC3702-Q1 Datasheet
1Mb / 28P
[Old version datasheet]   DUAL MICROPOWER LinCMOS??VOLTAGE COMPARATORS
TLC3702 TI1-TLC3702_16 Datasheet
1Mb / 38P
[Old version datasheet]   DUAL MICROPOWER LinCMOS VOLTAGE COMPARATORS
TLC3702 TI-TLC3702_V01 Datasheet
1Mb / 39P
[Old version datasheet]   DUAL MICROPOWER LinCMOS??VOLTAGE COMPARATORS
TLC3702 TI1-TLC3702_14 Datasheet
1Mb / 37P
[Old version datasheet]   DUAL MICROPOWER LinCMOS??VOLTAGE COMPARATORS
TLC3702CDR TI-TLC3702CDR Datasheet
1Mb / 36P
[Old version datasheet]   DUAL MICROPOWER LinCMOS??VOLTAGE COMPARATORS
TLC3704-Q1 TI1-TLC3704-Q1_14 Datasheet
395Kb / 26P
[Old version datasheet]   QUAD MICROPOWER LinCMOS VOLTAGE COMPARATORS
TLC3704-Q1 TI-TLC3704-Q1 Datasheet
383Kb / 23P
[Old version datasheet]   QUAD MICROPOWER LINCMOS VOLTAGE COMPARATORS
TLC3704 TI1-TLC3704_14 Datasheet
1Mb / 37P
[Old version datasheet]   QUAD MICROPOWER LinCMOS. VOLTAGE COMPARATORS
TLC3704 TI1-TLC3704_16 Datasheet
1Mb / 37P
[Old version datasheet]   QUAD MICROPOWER LinCMOS VOLTAGE COMPARATORS
TLC3702-EP TI1-TLC3702-EP Datasheet
964Kb / 30P
[Old version datasheet]   DUAL MICROPOWER LinCMOS??VOLTAGE COMPARATOR
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com