Very Low Power Consumption ...2 mW
Typ at VDD = 5 V
D
Capable of Operation in Astable Mode
D
CMOS Output Capable of Swinging Rail to
Rail
D
High Output-Current Capability
Sink 100 mA Typ
Source 10 mA Typ
D
Output Fully Compatible With CMOS, TTL,
D, J, OR N PACKAGE
(TOP VIEW)
1 DISCH
1 THRES
1 CONT
1 RESET
1 OUT
1 TRIG
GND
1
2
3
4
5
6
7
13
12
11
10
9
8
DD
2 DISCH
2 THRES
2 CONT
2 RESET
2 OUT
2 TRIG
V
14
and MOS
D
Low Supply Current Reduces Spikes
During Output Transitions
D
Single-Supply Operation From 2 V to 15 V
D
Functionally interchangeable With the
NE556; Has Same Pinout
description
The TLC556 series are monolithic timing circuits
fabricated using the TI LinCMOS process, which
provides full compatibility with CMOS, TTL, and
MOS logic and operates at frequencies up to
2 MHz. Accurate time delays and oscillations are
1 CONT
NC
1 RESET
NC
1 OUT
FK PACKAGE
(TOP VIEW)
1 THRES
1 DISCH
NC
3 2 1 20 19
4
5
6
7
8
910111213
DD
V
2 DISCH
18
17
16
15
14
2 THRES
NC
2 CONT
NC
2 RESET
possible with smaller, less-expensive timing
capacitors than the NE556 because of the high
input impedance. Power consumption is low
across the full range of power supply voltages.
Like the NE556, the TLC556 has a trigger level
NC–No internal connection
GND
1 TRIG
NC
2 OUT
2 TRIG
approximately one-third of the supply voltage and
a threshold level approximately two-thirds of the supply voltage. These levels can be altered by use of the control
voltage terminal. When the trigger input falls below the trigger level, the flip-flop is set and the output goes high.
If the trigger input is above the trigger level and the threshold input is above the threshold level, the flip-flop is
reset and the output is low. The reset input can override all other inputs and can be used to initiate a new timing
cycle. If the reset input is low, the flip-flop is reset and the output is low. Whenever the output is low, a
low-impedance path is provided between the discharge terminal and ground.
While the CMOS output is capable of sinking over 100 mA and sourcing over 10 mA, the TLC556 exhibits greatly
reduced supply-current spikes during output transitions. This minimizes the need for the large decoupling
capacitors required by the NE556.
These devices have internal electrostatic-discharge (ESD) protection circuits that prevent catastrophic failures
at voltages up to 2000 V as tested under MIL-STD-883C, Method 3015. However, care should be exercised in
handling these devices, as exposure to ESD may result in degradation of the device parametric performance.
All unused inputs should be tied to an appropriate logic level to prevent false triggering.
The TLC556C is characterized for operation from 0°C to 70°C. The TLC556I is characterized for operation from
–40°C to 85°C. The TLC556M is characterized for operation over the full military temperature range of –55°C
to 125°C.
LinCMOS is a trademark of Texas Instruments Incorporated.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Copyright 1997, Texas Instruments Incorporated
1
TLC556, TLC556Y
T
V
CHIP FORM
DUAL LinCMOS TIMERS
SLFS047B – FEBRUARY 1984 – REVISED SEPTEMBER 1997
AVAILABLE OPTIONS
A
RANGE
O°C
to
70°C
–4O°C
to
85°C
–55°C
to
125°C
The D package is available taped and reeled. Add the suffix R to the device type (e.g., TLC556CDR).
†
DD
RANGE
2 V
to
18 V
3 V
to
18 V
5 V
to
18 V
RESET
VOLTAGE
< MINIrrelevantIrrelevantLOn
> MAX< MINIrrelevantHOff
>MAX>MAX>MAXLOn
> MAX> MAX< MINAs previously established
For conditions shown as MIN or MAX, use the appropriate value specified under electrical characteristics.
SMALL OUTLINE
(D)
TLC556CDTLC556CNTLC556Y
TLC556lDTLC556IN
TLC556MDTLC556MFKTLC556MJTLC556MN
†
TRIGGER
VOLTAGE
CHIP CARRIER
FUNCTION TABLE
†
PACKAGE
(FK)
THRESHOLD
VOLTAGE
†
CERAMIC DIP
(J)
OUTPUT
PLASTIC DIP
(N)
DISCHARGE
SWITCH
(Y)
functional block diagram (each timer)
CONT
V
DD
14
R
THRES
TRIG
RESET can override TRIG and THRES.
TRIG can override THRES.
Pin numbers shown are for the D, J, or N packages.
2
R
6
R
7
GND
RESET
3
4
R1
RS1
5
OUT
1
DISCH
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TLC556, TLC556Y
DUAL LinCMOS TIMERS
SLFS047B – FEBRUARY 1984 – REVISED SEPTEMBER 1997
TLC556Y chip information
These chips, properly assembled, display characteristics similar to the TLC556 (see electrical table). Thermal
compression or ultrasonic bonding may be used on the doped aluminum bonding pads. Chips may be mounted
with conductive epoxy or a gold-silicon preform.
TOLERANCES ARE ±10%
ALL DIMENSIONS ARE IN MILS
NO BACKSIDE METALLIZATION
PIN (7) INTERNALLY CONNECTED
TO BACKSIDE OF CHIP
THRESH
TRIG
97
FUNCTIONAL BLOCK DIAGRAM (EACH TIMER)
(2)
(6)
(14)
V
DD
GND
CONT
R
R
R
(7)
(3)
RESET
(4)
R1
RS1
(5)
(1)
OUT
DISCH
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
3
TLC556, TLC556Y
DUAL LinCMOS TIMERS
SLFS047B – FEBRUARY 1984 – REVISED SEPTEMBER 1997
absolute maximum ratings over operating free-air temperature (unless otherwise noted)
TLC556CTLC556ITLC556MUNIT
Supply voltage, VDD (see Note 1)181818V
Input voltage range, V
Sink current, discharge or output150150150mA
Source current, output151515mA
Continuous total power dissipationSee Dissipation Rating Table
Operating free-air temperature range0 to 70–40 to 85–55 to 125°C
Storage temperature range–65 to 150–65 to 150–65 to 150°C
Case temperature for 60 secondsFK package260
Lead temperature 1,6 mm (1/16 inch) from case for 60 secondsJ package300
Lead temperature 1,6 mm (1/16 inch) from case for 10 secondsD or N package260260
NOTE 1: All voltage values are with respect to network ground terminal.
PACKAGE
D
FK
N
I
DISSIPATION RATING TABLE
TA ≤ 25°C
POWER RATING
950 mW
J
1375 mW
1375 mW
1150 mW
DERATING FACTOR
ABOVE TA = 25°C
7.6 mW/°C
11.0 mW/°C
11.0 mW/°C
9.2 mW/°C
TA = 70°C
POWER RATING
608 mW
880 mW
880 mW
736 mW
–0.3 to V
–0.3 to V
DD
TA = 85°C
POWER RATING
494 mW
715 mW
715 mW
598 mW
–0.3 to V
DD
TA = 125°C
POWER RATING
N/A
275 mW
275 mW
N/A
DD
V
°C
recommended operating conditions
Supply voltage, V
Operating free-air temperature range, T
DD
A
MINMAXUNIT
215V
TLC556C070
TLC556I–4085°C
TLC556M–55125
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PARAMETER
T
†
UNIT
VITInput threshold voltage
V
Threshold current
pA
V
Trigger voltage
V
I
Trigger current
pA
V
Reset voltage
V
I
Reset current
pA
g
I
mA
V
g
nA
VOHHigh-level output voltage
I
300 µA
V
VOLLow-level output voltage
I
mA
V
IDDSupply current
See Note 2
A
TLC556, TLC556Y
DUAL LinCMOS TIMERS
SLFS047B – FEBRUARY 1984 – REVISED SEPTEMBER 1997
electrical characteristics at specified free-air temperature, VDD = 2 V for TLC556C, VDD = 3 V for
TLC556I
TEST
CONDITIONS
p
(trigger)
(trigger)
(reset)
(reset)
Control voltage (open circuit) as
a percentage of supply voltage
Discharge switch on-state voltage
Discharge switch off-state current
p
p
pp
†
Full range is 0°C to 70°C for TLC556C and –40°C to 85°C for TLC556I.
NOTE 2: These values apply for the expected operating configurations in which THRES is connected directly to DISCH or TRIG.
OL
OH
OL
= 1
= –
= 1
A
25°C0.951.331.651.622.4
Full range0.851.751.52.5
25°C1010
MAX75150
25°C0.40.670.950.7111.29
Full range0.31.050.611.39
25°C1010
MAX75150
25°C0.41.11.50.41.11.5
Full range0.31.80.31.8
25°C1010
MAX75150
MAX66.7%66.7%
25°C0.040.20.030.2
Full range0.250.375
25°C0.10.1
MAX0.5120
25°C1.51.91.51.9
Full range1.52.5
25°C0.070.30.070.3
Full range0.350.4
25°C130500130500
Full range8001000
TLC556CTLC556I
MINTYPMAXMINTYPMAX
p
p
p
µ
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
5
TLC556, TLC556Y
PARAMETER
T
†
UNIT
V
V
Th
t
A
V
Tri
V
I
Tri
t
A
V
R
V
I
R
t
A
g
I
10 mA
V
g
A
V
g
I
1 mA
V
I
8 mA
V
I
5 mA
V
I
3.2 mA
IDDSupply current
See Note 2
µA
DUAL LinCMOS TIMERS
SLFS047B – FEBRUARY 1984 – REVISED SEPTEMBER 1997
electrical characteristics at specified free-air temperature, VDD = 5 V
TEST
CONDITIONS
IT
(trigger)
(trigger)
(reset)
(reset)
OH
OL
†
Full range is 0
NOTE 2:These values apply for the expected operating configurations in which THRES is connected directly to DISCH or to TRIG.
Input threshold
voltage
reshold curren
gger voltage
gger curren
eset voltage
eset curren
Control voltage (open
circuit) as a
percentage of supply
voltage
Discharge switch
on-state voltage
Discharge switch
off-state current
High-level output
voltage
Low-level output
voltage
pp
OL
OH
OL
OL
OL
=
= –
=
=
=
°C to 70°C for TLC556C, –40°C to 85°C for TLC556I, and –55°C to 125°C for TLC556M.
Initial error of timing interval
Supply voltage sensitivity of timing interval
t
Output pulse rise time
r
t
Output pulse fall time
f
f
Maximum frequency in astable mode
max
†
Timing interval error is defined as the difference between the measured value and the average value of a random sample from each process
run.
NOTE 3: RA, RB, and CT are as defined in Figure 3.
†
VDD = 5 V to 15 V,RA = RB = 1 kΩ to 100 kΩ1%3%
CT = 0.1 µF,See Note 30.10.5%/V
= 10 MΩ,
L
RA = 470 Ω,
CT = 200 pF,
p
= 10
L
RB = 200 Ω,
See Note 3
1.22.1MHz
2075
1560
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TLC556, TLC556Y
DUAL LinCMOS TIMERS
SLFS047B – FEBRUARY 1984 – REVISED SEPTEMBER 1997
TYPICAL CHARACTERISTICS
PROPAGATION DELAY TIMES (TO DISCHARGE
OUTPUT FROM TRIGGER AND THRESHOLD
SHORTED TOGETHER)
DISCHARGE SWITCH ON-STATE RESISTANCE
vs
FREE-AIR TEMPERATURE
100
70
Ω
40
VDD = 2 V, IO = 1 mA
SUPPLY VOLTAGE
600
500
vs
I
≥ 1 mA
O(on)
CL ≈ 0
TA = 25°C
20
10
7
4
2
Discharge Switch On-State Resistance –
1
–75 –50–2502575125
TA – Free-Air Temperature – °C
VDD = 5 V, IO = 10 mA
VDD = 15 V, IO = 100 mA
50100
Figure 1
400
300
t
t
PLH
PHL
‡
200
PLH
t– Propagation Delay Times – ns
100
PHL
t,
0
024681216
VDD – Supply Voltage – V
‡
The effects of the load resistance on these values must be
taken into account separately.
1014
Figure 2
2018
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
9
TLC556, TLC556Y
DUAL LinCMOS TIMERS
SLFS047B – FEBRUARY 1984 – REVISED SEPTEMBER 1997
APPLICATION INFORMATION
0.1 µF
R
A
R
B
Connecting the trigger input to the threshold input, as shown in Figure 3, causes the timer to run as a
multivibrator. The capacitor C
V
DD
The output is high during the charging cycle (tH) and low during the discharge cycle (tL). The duty cycle is
controlled by the values of RA, and RB, and CT, as shown in the equations below.
0.1 µF
CONTV
RESET
TLC556
DISCH
THRES
TRIG
C
T
CIRCUITTRIGGER AND THRESHOLD VOLTAGE WAVEFORM
) and then discharges through RB only to the value of the trigger voltage level (approximately 0.33 VDD).
tH[
CT(RA)
GND
DD
OUT
R
L
Output
C
L
Figure 3. Astable Operation
charges through RA and RB to the threshold voltage level (approximately 0.67
T
RB) In 2(In 2+0.693)
2/3 V
1/3 V
V
DD
DD
DD
GND
t
PHL
t
H
t
PLH
t
L
tL[
CTRBIn 2
Period+tH)
Output driver duty cycle
Output waveform duty cycle
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 from the trigger and threshold inputs to the
discharge output. These delay times add directly to the period and create differences between calculated and
actual values that increase with frequency . In addition, the discharge output resistance r
another source of error in the calculation when RB is very low or ron is very high.
The equations below provide better agreement with measured values.
tH+
tL+
CT(RA)
CT(RB)
tL[
CT(RA)
t
+
tH)
+
RB)Inƪ3*exp
ron)Inƪ3*exp
2RB)In2
L
t
L
t
H
tH)
[1*
[
t
L
*
ǒ
CT(RB)
*
ǒ
CT(RA)
RA)
R
RA)
t
PLH
t
PHL
R
B
B
2R
2R
ron)
RB)
B
B
adds to RB to provide
on
Ǔ
)
t
ƫ
PHL
Ǔ
)
t
ƫ
PLH
10
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TLC556, TLC556Y
DUAL LinCMOS TIMERS
SLFS047B – FEBRUARY 1984 – REVISED SEPTEMBER 1997
APPLICATION INFORMATION
The preceding 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
t
terms can be substituted with good results. Duty cycles less than 50%
possibly RA ≤ ron. These conditions can be difficult to obtain.
In monostable applications, the trip point of the trigger input 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.
tH)
H
will require that
t
L
t
H
< 1 and
t
L
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
11
TLC556, TLC556Y
DUAL LinCMOS TIMERS
SLFS047B – FEBRUARY 1984 – REVISED SEPTEMBER 1997
MECHANICAL INFORMATION
D (R-PDSO-G**) PLASTIC SMALL-OUTLINE PACKAGE
14 PIN SHOWN
14
1
0.069 (1,75) MAX
0.050 (1,27)
A
0.020 (0,51)
0.014 (0,35)
0.010 (0,25)
0.004 (0,10)
8
7
0.010 (0,25)
0.157 (4,00)
0.150 (3,81)
M
0.244 (6,20)
0.228 (5,80)
Seating Plane
0.004 (0,10)
PINS **
DIM
A MAX
A MIN
0.008 (0,20) NOM
Gage Plane
0°–8°
8
0.197
(5,00)
0.189
(4,80)
14
0.344
(8,75)
0.337
(8,55)
0.010 (0,25)
0.044 (1,12)
0.016 (0,40)
4040047/D 10/96
16
0.394
(10,00)
0.386
(9,80)
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. Body dimensions do not include mold flash or protrusion, not to exceed 0.006 (0,15).
D. Falls within JEDEC MS-012
12
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TLC556, TLC556Y
DUAL LinCMOS TIMERS
SLFS047B – FEBRUARY 1984 – REVISED SEPTEMBER 1997
MECHANICAL INFORMATION
FK (S-CQCC-N**) LEADLESS CERAMIC CHIP CARRIER
28 TERMINAL SHOWN
A SQ
B SQ
19
20
21
22
23
24
25
1282627
12
131415161817
0.020 (0,51)
0.010 (0,25)
MIN
0.342
(8,69)
0.442
0.640
0.739
0.938
1.141
A
0.358
(9,09)
0.458
(11,63)
0.660
(16,76)
0.761
(19,32)(18,78)
0.962
(24,43)
1.165
(29,59)
NO. OF
TERMINALS
**
11
10
9
8
7
6
5
432
20
28
44
52
68
84
0.020 (0,51)
0.010 (0,25)
(11,23)
(16,26)
(23,83)
(28,99)
MINMAX
0.307
(7,80)
0.406
(10,31)
0.495
(12,58)
0.495
(12,58)
0.850
(21,6)
1.047
(26,6)
0.080 (2,03)
0.064 (1,63)
B
MAX
0.358
(9,09)
0.458
(11,63)
0.560
(14,22)
0.560
(14,22)
0.858
(21,8)
1.063
(27,0)
0.055 (1,40)
0.045 (1,14)
0.028 (0,71)
0.022 (0,54)
0.050 (1,27)
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. This package can be hermetically sealed with a metal lid.
D. The terminals are gold plated.
E. Falls within JEDEC MS-004
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
0.045 (1,14)
0.035 (0,89)
0.045 (1,14)
0.035 (0,89)
4040140/D 10/96
13
TLC556, TLC556Y
DUAL LinCMOS TIMERS
SLFS047B – FEBRUARY 1984 – REVISED SEPTEMBER 1997
MECHANICAL INFORMATION
J (R-GDIP-T**) CERAMIC DUAL-IN-LINE PACKAGE
14 PIN SHOWN
14
1
B
0.065 (1,65)
0.045 (1,14)
0.100 (2,54)
0.070 (1,78)
8
C
7
0.020 (0,51) MIN
0.200 (5,08) MAX
PINS **
DIM
A MAX
A MIN
B MAX
B MIN
C MAX
C MIN
Seating Plane
0.310
(7,87)
0.290
(7,37)
0.785
(19,94)
0.755
(19,18)
0.280
(7,11)
0.245
(6,22)
0.310
(7,87)
0.290
(7,37)
0.785
(19,94)
0.755
(19,18)
0.300
(7,62)
0.245
(6,22)
A
181614
0.310
(7,87)
0.290
(7,37)
0.910
(23,10)
0.300
(7,62)
0.245
(6,22)
20
0.310
(7,87)
0.290
(7,37)
0.975
(24,77)
0.930
(23,62)
0.300
(7,62)
0.245
(6,22)
0.130 (3,30) MIN
0.100 (2,54)
0.023 (0,58)
0.015 (0,38)
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. This package can be hermetically sealed with a ceramic lid using glass frit.
D. Index point is provided on cap for terminal identification only on press ceramic glass frit seal only.
E. Falls within MIL-STD-1835 GDIP1-T14, GDIP1-T16, GDIP1-T18, and GDIP1-T20
0°–15°
0.014 (0,36)
0.008 (0,20)
4040083/C 08/96
14
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TLC556, TLC556Y
DUAL LinCMOS TIMERS
SLFS047B – FEBRUARY 1984 – REVISED SEPTEMBER 1997
MECHANICAL INFORMATION
N (R-PDIP-T**) PLASTIC DUAL-IN-LINE PACKAGE
16 PIN SHOWN
16
1
0.035 (0,89) MAX
PINS **
DIM
A
9
0.260 (6,60)
0.240 (6,10)
8
0.070 (1,78) MAX
0.020 (0,51) MIN
0.200 (5,08) MAX
A MAX
A MIN
Seating Plane
14
0.775
(19,69)
0.745
(18,92)
16
0.775
(19,69)
0.745
(18,92)
18
0.920
(23.37)
0.850
(21.59)
20
0.975
(24,77)
0.940
(23,88)
0.310 (7,87)
0.290 (7,37)
0.100 (2,54)
0.021 (0,53)
0.015 (0,38)
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. Falls within JEDEC MS-001 (20 pin package is shorter then MS-001.)
0.010 (0,25)
M
0.125 (3,18) MIN
0°–15°
0.010 (0,25) NOM
14/18 PIN ONL Y
4040049/C 08/95
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
15
IMPORTANT NOTICE
T exas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue
any product or service without notice, and advise customers to obtain the latest version of relevant information
to verify, before placing orders, that information being relied on is current and complete. All products are sold
subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those
pertaining to warranty, patent infringement, and limitation of liability.
TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty . Specific testing of all parameters of each device is not necessarily
performed, except those mandated by government requirements.
CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF
DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL
APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR
WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER
CRITICAL APPLICA TIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERST OOD TO
BE FULLY AT THE CUSTOMER’S RISK.
In order to minimize risks associated with the customer’s applications, adequate design and operating
safeguards must be provided by the customer to minimize inherent or procedural hazards.
TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent
that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other
intellectual property right of TI covering or relating to any combination, machine, or process in which such
semiconductor products or services might be or are used. TI’s publication of information regarding any third
party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.
Copyright 2000, Texas Instruments Incorporated
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