TSM921-TSM924
Ultra-Low-Power, Single/Dual-Supply Comparators
FEATURES
♦ Ultra-Low Quiescent Current Over Temperature
TSM921/TSM922: 4μA (total)
TSM923/TSM924: <2.5μA per comparator
♦ Single or Dual Power Supplies:
Single: +2.5V to +11V
Dual: ±1.25V to ±5.5V
♦ Input Voltage Range Includes Negative Supply
♦ 12μs Propagation Delay at 10mV Overdrive
♦ Push-pull TTL/CMOS-Compatible Outputs
♦ Crowbar-Current-Free Switching
♦ Continuous Source Current Capability: 40mA
♦ Internal 1.182V ±1% Reference:
TSM921/TSM923/TSM924
♦ Adjustable Hysteresis: TSM921/TSM923
DESCRIPTION
The TSM921–TSM924 family of single/dual/quad,
low-voltage, micropower analog comparators is
electrically and form-factor identical to the MAX921-
MAX924 family of analog comparators. Ideal for 3V or
5V single-supply applications, the TSM921–TSM924
family can operate from single +2.5V to +11V
supplies or from ±1.25V to ±5.5V dual supplies. The
single TSM921 and the dual TSM922 draw less than
4μA (max) supply current over temperature. The dual
TSM923 and the quad TSM924 draw less than 2.5μA
per comparator over temperature.
All comparators in this family exhibit an input voltage
range from the negative supply rail to within 1.3V of
the positive supply. In addition, the comparators’
push-pull output stages are TTL/CMOS compatible
and capable of sinking and sourcing current. The
TSM921/TSM923/TSM924 each incorporates an
internal 1.182V ±1% voltage reference. Without
complicated feedback configurations and only
requiring two additional resistors, adding external
hysteresis via a separate pin is available on the single
TSM921 and the dual TSM923.
APPLICATIONS
Threshold Detectors
Window Comparator
Level Translators
Oscillator Circuits
Battery-Powered Systems
TYPICAL APPLICATION CIRCUIT
PART
A 5V, Low-Parts-Count Window Detector
TSM921
TSM922
TSM923
TSM924
INTERNAL COMPARATORS INTERNAL
REFERENCE PER PACKAGE HYSTERESIS
Yes
1
Yes
No
2
No
Yes
2
Yes
Yes
4
No
PART
TSM921C
TSM921E
TSM922C
TSM922E
TSM923C
TSM923E
TSM924C
TSM924E
The Touchstone Semiconductor logo is a registered
trademark of Touchstone Semiconductor, Incorporated.
TEMPERATURE
PACKAGE
RANGE
0ºC to 70ºC
8-Pin MSOP/SOIC
-40ºC to 85ºC
0ºC to 70ºC
8-Pin MSOP/SOIC
-40ºC to 85ºC
0ºC to 70ºC
8-Pin MSOP/SOIC
-40ºC to 85ºC
0ºC to 70ºC
16-Pin SOIC
-40ºC to 85ºC
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© 2012 Touchstone Semiconductor, Inc. All rights reserved.
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