LTC6993-1/LTC6993-2
LTC6993-3/LTC6993-4
TimerBlox: Monostable
Pulse Generator (One Shot)
FEATURES
n
n
n
DESCRIPTION
The LTC
®
6993 is a monostable multivibrator (also known
as a “one-shot” pulse generator) with a programmable
pulse width of 1µs to 33.6 seconds. The LTC6993 is part
of the TimerBlox
®
family of versatile silicon timing devices.
A single resistor, R
SET
, programs an internal master os-
cillator frequency, setting the LTC6993’s time base. The
output pulse width is determined by this master oscillator
and an internal clock divider, N
DIV
, programmable to eight
settings from 1 to 2
21
.
t
OUT
=
N
DIV
•R
SET
•1µs, N
DIV
= 1, 8, 64,...,2
21
50kΩ
n
n
n
n
n
n
n
n
n
Pulse Width Range: 1µs to 33.6 Seconds
Configured with 1 to 3 Resistors
Pulse Width Max Error:
– <2.3% for Pulse Width > 512µs
– <3.4% for Pulse Width of 8µs to 512µs
– <4.9% for Pulse Width of 1µs to 8µs
Four LTC6993 Options Available:
– Rising-Edge or Falling-Edge Trigger
– Retriggerable or Non-Retriggerable
Configurable for Positive or Negative Output Pulse
Fast Recovery Time
2.25V to 5.5V Single Supply Operation
70µA Supply Current at 10µs Pulse Width
500µs Start-Up Time
CMOS Output Driver Sources/Sinks 20mA
–55°C to 125°C Operating Temperature Range
Available in Low Profile (1mm) SOT-23 (ThinSOT™)
and 2mm
×
3mm DFN
The output pulse is initiated by a transition on the trigger
input (TRIG). Each part can be configured to generate posi-
tive or negative output pulses. The LTC6993 is available
in four versions to provide different trigger signal polarity
and retrigger capability.
DEVICE
LTC6993-1
LTC6993-2
LTC6993-3
LTC6993-4
INPUT POLARITY
Rising-Edge
Rising-Edge
Falling-Edge
Falling-Edge
RETRIGGER
No
Yes
No
Yes
APPLICATIONS
n
n
n
n
n
n
Watchdog Timer
Frequency Discriminators
Missing Pulse Detection
Envelope Detection
High Vibration, High Acceleration Environments
Portable and Battery-Powered Equipment
The LTC6993 also offers the ability to dynamically adjust
the width of the output pulse via a separate control voltage.
For easy configuration of the LTC6993, download the
TimerBlox Designer tool at
www.linear.com/timerblox.
L,
LT, LTC, LTM, Linear Technology, TimerBlox and the Linear logo are registered trademarks
and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
TYPICAL APPLICATION
Envelope Detector
MODULATED
CARRIER
TRIG
OUT
V
+
0.1µF
R
SET
800k
SET
DIV
69931234 TA01a
80kHz CARRIER
SIGNAL
ENVELOPE
TRIG
2V/DIV
LTC6993-2
GND
3.3V
16µs
OUT
2V/DIV
50µs/DIV
69931234 TA01b
69931234fb
1
LTC6993-1/LTC6993-2
LTC6993-3/LTC6993-4
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Supply Voltage (V
+
) to GND ........................................6V
Maximum Voltage on Any Pin
.................................. (GND – 0.3V) ≤ V
PIN
≤ (V
+
+ 0.3V)
Operating Temperature Range (Note 2)
LTC6993C ............................................–40°C to 85°C
LTC6993I .............................................–40°C to 85°C
LTC6993H .......................................... –40°C to 125°C
LTC6993MP ....................................... –55°C to 125°C
Specified Temperature Range (Note 3)
LTC6993C ................................................ 0°C to 70°C
LTC6993I .............................................–40°C to 85°C
LTC6993H .......................................... –40°C to 125°C
LTC6993MP ....................................... –55°C to 125°C
Junction Temperature ........................................... 150°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
S6 Package ....................................................... 300°C
PIN CONFIGURATION
TOP VIEW
V
+
1
DIV 2
SET 3
7
6 OUT
5 GND
4 TRIG
TRIG 1
GND 2
SET 3
TOP VIEW
6 OUT
5 V
+
4 DIV
DCB PACKAGE
6-LEAD (2mm
×
3mm) PLASTIC DFN
T
JMAX
= 150°C,
θ
JA
= 64°C/W,
θ
JC
= 10.6°C/W
EXPOSED PAD (PIN 7) CONNECTED TO GND,
PCB CONNECTION OPTIONAL
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
T
JMAX
= 150°C,
θ
JA
= 192°C/W,
θ
JC
= 51°C/W
ORDER INFORMATION
Lead Free Finish
TAPE AND REEL (MINI)
LTC6993IDCB-1#TRMPBF
TAPE AND REEL
LTC6993IDCB-1#TRPBF
PART MARKING*
LDXH
LDXH
LDXH
LDXK
LDXK
LDXK
LFMJ
LFMJ
LFMJ
LFMM
LFMM
LFMM
LTDXG
LTDXG
LTDXG
PACKAGE DESCRIPTION
6-Lead (2mm
×
3mm) Plastic DFN
6-Lead (2mm
×
3mm) Plastic DFN
6-Lead (2mm
×
3mm) Plastic DFN
6-Lead (2mm
×
3mm) Plastic DFN
6-Lead (2mm
×
3mm) Plastic DFN
6-Lead (2mm
×
3mm) Plastic DFN
6-Lead (2mm
×
3mm) Plastic DFN
6-Lead (2mm
×
3mm) Plastic DFN
6-Lead (2mm
×
3mm) Plastic DFN
6-Lead (2mm
×
3mm) Plastic DFN
6-Lead (2mm
×
3mm) Plastic DFN
6-Lead (2mm
×
3mm) Plastic DFN
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
SPECIFIED TEMPERATURE RANGE
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
69931234fb
LTC6993CDCB-1#TRMPBF LTC6993CDCB-1#TRPBF
LTC6993HDCB-1#TRMPBF LTC6993HDCB-1#TRPBF
LTC6993CDCB-2#TRMPBF LTC6993CDCB-2#TRPBF
LTC6993IDCB-2#TRMPBF
LTC6993IDCB-2#TRPBF
LTC6993HDCB-2#TRMPBF LTC6993HDCB-2#TRPBF
LTC6993CDCB-3#TRMPBF LTC6993CDCB-3#TRPBF
LTC6993IDCB-3#TRMPBF
LTC6993IDCB-3#TRPBF
LTC6993HDCB-3#TRMPBF LTC6993HDCB-3#TRPBF
LTC6993CDCB-4#TRMPBF LTC6993CDCB-4#TRPBF
LTC6993IDCB-4#TRMPBF
LTC6993CS6-1#TRMPBF
LTC6993IS6-1#TRMPBF
LTC6993HS6-1#TRMPBF
LTC6993IDCB-4#TRPBF
LTC6993CS6-1#TRPBF
LTC6993IS6-1#TRPBF
LTC6993HS6-1#TRPBF
LTC6993HDCB-4#TRMPBF LTC6993HDCB-4#TRPBF
2
LTC6993-1/LTC6993-2
LTC6993-3/LTC6993-4
ORDER INFORMATION
Lead Free Finish
TAPE AND REEL (MINI)
LTC6993CS6-2#TRMPBF
LTC6993IS6-2#TRMPBF
LTC6993HS6-2#TRMPBF
LTC6993CS6-3#TRMPBF
LTC6993IS6-3#TRMPBF
LTC6993HS6-3#TRMPBF
LTC6993CS6-4#TRMPBF
LTC6993IS6-4#TRMPBF
LTC6993HS6-4#TRMPBF
TAPE AND REEL
LTC6993CS6-2#TRPBF
LTC6993IS6-2#TRPBF
LTC6993HS6-2#TRPBF
LTC6993CS6-3#TRPBF
LTC6993IS6-3#TRPBF
LTC6993HS6-3#TRPBF
LTC6993CS6-4#TRPBF
LTC6993IS6-4#TRPBF
LTC6993HS6-4#TRPBF
PART MARKING*
LTDXJ
LTDXJ
LTDXJ
LTFMH
LTFMH
LTFMH
LTFMK
LTFMK
LTFMK
LTDXG
LTDXJ
LTFMH
LTFMK
PACKAGE DESCRIPTION
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
6-Lead Plastic TSOT-23
SPECIFIED TEMPERATURE RANGE
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
–55°C to 125°C
–55°C to 125°C
–55°C to 125°C
–55°C to 125°C
LTC6993MPS6-1#TRMPBF LTC6993MPS6-1#TRPBF
LTC6993MPS6-2#TRMPBF LTC6993MPS6-2#TRPBF
LTC6993MPS6-3#TRMPBF LTC6993MPS6-3#TRPBF
LTC6993MPS6-4#TRMPBF LTC6993MPS6-4#TRPBF
TRM = 500 pieces. *Temperature grades are identified by a label on the shipping container.
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on lead based finish parts.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/
ELECTRICAL CHARACTERISTICS
SYMBOL
t
OUT
∆t
OUT
PARAMETER
Output Pulse Width
Pulse Width Accuracy (Note 4)
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. Test conditions are V
+
= 2.25V to 5.5V, TRIG = 0V, DIVCODE = 0 to 15
(N
DIV
= 1 to 2
21
), R
SET
= 50k to 800k, R
LOAD
= 5k, C
LOAD
= 5pF unless otherwise noted.
CONDITIONS
N
DIV
≥ 512
l
MIN
1µ
TYP
±1.7
±2.4
MAX
33.55
±2.3
±3.0
±3.4
±4.4
±4.9
±6.0
±5.3
±6.4
UNITS
sec
%
%
%
%
%
%
%
%
%/°C
%/°C
%
%
8 ≤ N
DIV
≤ 64
l
N
DIV
= 1 (LTC6993-1 or LTC6993-2)
l
±3.6
±4.0
l
l
l
N
DIV
= 1 (LTC6993-3 or LTC6993-4)
∆t
OUT
/∆T
Pulse Width Drift Over Temperature
Pulse Width Change With Supply
N
DIV
≥ 512
N
DIV
≤ 64
N
DIV
≥ 512
8 ≤ N
DIV
≤ 64
V
+
= 4.5V to 5.5V
V
+
= 2.25V to 4.5V
V
+
= 4.5V to 5.5V
V
+
= 2.7V to 4.5V
V
+
= 2.25V to 2.7V
±0.006
±0.008
–0.6
–0.4
–0.9
–0.7
–1.1
–0.2
–0.1
–0.2
–0.2
–0.1
0.4
0.9
l
l
l
l
l
%
%
%
69931234fb
3
LTC6993-1/LTC6993-2
LTC6993-3/LTC6993-4
ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
Pulse Width Jitter (Note 10)
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. Test conditions are V
+
= 2.25V to 5.5V, TRIG = 0V, DIVCODE = 0 to 15
(N
DIV
= 1 to 2
21
), R
SET
= 50k to 800k, R
LOAD
= 5k, C
LOAD
= 5pF unless otherwise noted.
CONDITIONS
N
DIV
= 1
N
DIV
= 8
N
DIV
= 64
N
DIV
= 512
N
DIV
= 4096
V
+
= 5.5V
V
+
= 2.25V
MIN
TYP
0.85
0.45
0.20
0.05
0.20
0.03
6 • t
MASTER
l
l
MAX
UNITS
%
P-P
%
P-P
%
P-P
%
P-P
%
P-P
%
P-P
µs
t
S
V
+
I
S(IDLE)
Pulse Width Change Settling Time (Note 9) t
MASTER
= t
OUT
/N
DIV
Operating Supply Voltage Range
Power-On Reset Voltage
Supply Current (Idle)
R
L
= ∞, R
SET
= 50k, N
DIV
≤ 64
R
L
= ∞, R
SET
= 50k, N
DIV
≥ 512
R
L
= ∞, R
SET
= 800k, N
DIV
≤ 64
V
+
= 5.5V
V
+
= 2.25V
V
+
= 5.5V
V
+
= 2.25V
V
+
= 5.5V
V
+
= 2.25V
2.25
Power Supply
5.5
1.95
165
125
135
105
70
60
65
55
0.97
50
0
1.00
±75
800
V
+
±1.5
±10
2.5
TRIG = 0V to V
+
(Note 6)
(Note 6)
V
+
= 2.7V to 5.5V
V
+
= 5.5V
V
+
= 5.5V
V
+
= 2.25V
V
OL
Low Level Output Voltage (Note 7)
V
+
= 5.5V
V
+
= 3.3V
V
+
= 2.25V
I
OUT
= –1mA
I
OUT
= –16mA
I
OUT
= –1mA
I
OUT
= –16mA
I
OUT
= –1mA
I
OUT
= –8mA
I
OUT
= 1mA
I
OUT
= 16mA
I
OUT
= 1mA
I
OUT
= 10mA
I
OUT
= 1mA
I
OUT
= 8mA
l
l
l
l
l
l
l
l
l
l
l
l
l
l
V
V
µA
µA
µA
µA
µA
µA
µA
µA
V
µV/°C
kΩ
V
%
nA
pF
l
l
l
l
l
l
l
l
200
160
175
140
110
95
100
90
1.03
R
L
= ∞, R
SET
= 800k, N
DIV
≥ 512 V
+
= 5.5V
V
+
= 2.25V
Analog Inputs
V
SET
∆V
SET
/∆T
R
SET
V
DIV
Voltage at SET Pin
V
SET
Drift Over Temperature
Frequency-Setting Resistor
DIV Pin Voltage
Deviation from Ideal
V
DIV
/V
+
= (DIVCODE + 0.5)/16
l
l
l
l
l
l
∆V
DIV
/∆V
+
DIV Pin Valid Code Range (Note 5)
DIV Pin Input Current
Digital I/O
TRIG Pin Input Capacitance
TRIG Pin Input Current
V
IH
V
IL
I
OUT(MAX)
V
OH
High Level TRIG Pin Input Voltage
Low Level TRIG Pin Input Voltage
Output Current
High Level Output Voltage (Note 7)
±10
0.7 • V
+
0.3 • V
+
±20
5.45
4.84
3.24
2.75
2.17
1.58
5.48
5.15
3.27
2.99
2.21
1.88
0.02
0.26
0.03
0.22
0.03
0.26
0.04
0.54
0.05
0.46
0.07
0.54
nA
V
V
mA
V
V
V
V
V
V
V
V
V
V
V
V
69931234fb
4
LTC6993-1/LTC6993-2
LTC6993-3/LTC6993-4
ELECTRICAL CHARACTERISTICS
SYMBOL
t
PD
t
WIDTH
t
ARM
t
RETRIG
t
r
t
f
PARAMETER
Trigger Propagation Delay
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. Test conditions are V
+
= 2.25V to 5.5V, TRIG = 0V, DIVCODE = 0 to 15
(N
DIV
= 1 to 2
21
), R
SET
= 50k to 800k, R
LOAD
=
∞,
C
LOAD
= 5pF unless otherwise noted.
CONDITIONS
V
+
= 5.5V
V
+
= 3.3V
V
+
= 2.25V
V
+
= 3.3V
N
DIV
= 1
N
DIV
> 1
V
+
= 5.5V
V
+
= 3.3V
V
+
= 2.25V
V
+
= 5.5V
V
+
= 3.3V
V
+
= 2.25V
V
+
= 3.3V
V
+
= 3.3V
MIN
TYP
11
17
28
5
–4
10
50
1.1
1.7
2.7
1.0
1.6
2.4
MAX
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Minimum Recognized TRIG Pulse Width
Recovery Time (LTC6993-1/LTC6993-3)
Time Between Trigger Signals
(LTC6993-2/LTC6993-4)
Output Rise Time (Note 8)
Output Fall Time (Note 8)
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2:
The LTC6993C is guaranteed functional over the operating
temperature range of –40°C to 85°C.
Note 3:
The LTC6993C is guaranteed to meet specified performance from
0°C to 70°C. The LTC6993C is designed, characterized and expected to
meet specified performance from –40°C to 85°C but it is not tested or
QA sampled at these temperatures. The LTC6993I is guaranteed to meet
specified performance from –40°C to 85°C. The LTC6993H is guaranteed
to meet specified performance from –40°C to 125°C. The LTC6993MP is
guaranteed to meet specified performance from –55°C to 125°C.
Note 4:
Pulse width accuracy is defined as the deviation from the t
OUT
equation, assuming R
SET
is used to program the pulse width.
Note 5:
See Operation section, Table 1 and Figure 2 for a full explanation
of how the DIV pin voltage selects the value of DIVCODE.
Note 6:
The TRIG pin has hysteresis to accommodate slow rising or falling
signals. The threshold voltages are proportional to V
+
. Typical values can
be estimated at any supply voltage using:
V
TRIG(RISING)
≈ 0.55 • V
+
+ 185mV and
V
TRIG(FALLING)
≈ 0.48 • V
+
– 155mV
Note 7:
To conform to the Logic IC Standard, current out of a pin is
arbitrarily given a negative value.
Note 8:
Output rise and fall times are measured between the 10% and the
90% power supply levels with 5pF output load. These specifications are
based on characterization.
Note 9:
Settling time is the amount of time required for the output to settle
within ±1% of the final pulse width after a 0.5× or 2× change in I
SET
.
Note 10:
Jitter is the ratio of the deviation of the output pulse width to the
mean of the pulse width. This specification is based on characterization
and is not 100% tested.
69931234fb
5
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