TLC555 Timer
(276-1718)                 Specifications             Faxback Doc. # 31977

Very Low Power Consumption:............................1 mW Type at V^DD=5V
Capable of Very High-Speed Operation:.......Typically 2 mHz in Astable Mode

Complementary CMOS output Capable of Swinging Rail-to-Rail

High Output-Current Capability:.............................Sink 100 mA Typ
                                                           Source 10 mA Typ

Output Fully CMOS-, TTL-, and MOS-Compatible

Low Supply Current Reduces Spikes During Output Transitions

High Impedance Inputs:.......................................10^12 Ohms Typ
Single-Supply Operation:......................................2 to 18 volts

  Functionally Interchangable with the NE555; has Same Pinout

FUNCTION TABLE

RESET         TRIGGER           THRESHOLD         OUTPUT         DISCHARGE
              VOLTAGE+          VOLTAGE+                         SWITCH

Low           Irrelevent        Irrelevent        Low            On
High          < 1/3 V^DD        Irrelevent        High           Off
High          > 1/3 V^DD        > 2/3 V^DD        Low            On
High          > 1/3 V^DD        < 2/3 V^DD        As previously
                                                  established.

+ Voltages levels shown are nominal.

absolute maximum ratings over operating free-air temperature range
(unless otherwise noted)

Supply voltage, V^DD (see Note 1):.....................................18 V
Input voltage range (any input):.............................-0.3 V to 18 V
Continuous total dissipation at (or below):..........................600 mW
25 degrees C free-air temperature
Operating free-air temperature range:...........0 degrees C to 70 degrees C
Storage temperature range:...................-65 degrees C to 150 degrees C
Lead temperature 1.6 mm (1/16 inch)from the case for 10
seconds:......................................................260 degrees C

NOTES:  1.  All voltage values, are with respect to network ground
            terminal.

Electrical characteristics at 25 degrees C free-air temperature, V^DD=5
V to 15 V (unless otherwise noted)

PARAMETER         TEST CONDITIONS            MIN    TYP  MAX       UNIT

Threshold                                         66.7%
voltage level as
a percentage of
supply voltage

Threshold         V^DD = 5 V                       10              pA
current

Trigger voltage
level as a
percentage of                                      33.3%
supply voltage

Trigger current   V^DD = 5                         10              pA

Reset voltage                                      0.7              V
level

Reset current     V^DD = 5                         +/-10           pA

Control voltage
(open-circuit) as                                  66.7%
a percentage of
supply voltage

Low-level output
voltage           V^DD = 15 V   ^IOF = 10 mA       0.1
                                ^IOL = 50 MA       0.5
                                ^IOL = 100 mA        1              V

                  V^DD = 5 V    ^IOL = 5 mA        0.1
                                ^IOL = 8 mA        0.16

                                ^IOL = -1 mA       14.8
High-level        V^DD = 15 V   ^IOL = -5 mA       14
output voltage                  ^IOL =  10 mA      12.7
                                                                    V
                  V^DD = 5 V    ^IOL = -2 mA        4
                  V^DD = 5 V    ^IOL = -1 mA      4.5

                  V^DD = 15 V                     360
Supply Current    V^DD = 5 V                      170          microA

Operating Characteristics, V^DD = 5V

Initial error of  V^DD = 5 V to 15 V,              1%             %/V
timing interval

Supply            R^A = R^B = 1 kohm to 100 kohms.
voltage           C^T = 0.1 microF,
sensitivity of    See Figure 1
timing interval                                    0.1

Output pulse      V^DD = 5 V.   R^L = 10 Mohms,    20
rise time

Output pulse      C^L = 10 pF                      20              ns
fall time

Maximum 
frequency in      R^A = 470 Ohms,   R^B = 200 Ohms, 2.1           MHz
astable mode      C^T = 200 pF


(LB-03/23/95)