TSM9120ESA+T datasheet(11/17 Pages) TOUCHSTONE

Part #	TSM9120ESA+T

Description	1.6V Nanopower Comparators with/without Internal References

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Manufacturer	TOUCHSTONE [Touchstone Semiconductor Inc]

Direct Link	http://www.touchstonesemi.com

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TSM9117-TSM9120

TSM9117_20DS r1p0

Page 11

RTFDS

PIN FUNCTIONS

TSM9117/TSM9118

TSM9119/TSM9120

NAME

FUNCTION

SC70

SO

SC70

SO

1

6

1

6

OUT

Comparator Output

2

4

2

4

VEE

Negative Supply Voltage

3

IN+

Comparator Noninverting Input

4

2

—

REF

1.252V Reference Output and

Comparator Inverting Input

5

7

5

7

VCC

Positive Supply Voltage

—

4

2

IN-

Comparator Inverting Input

—

1, 5, 8

—

1, 5, 8

NC

No Connection. Not internally connected.

BLOCK DIAGRAMS

DESCRIPTION OF OPERATION

Guaranteed to operate from +1.6V supplies, the

TSM9117 and the TSM9118 comparators only draw

600nA supply current, feature a robust input stage

that can tolerate input voltages 200mV beyond the

power supply rails, and include an on-board +1.252V

±1.75% voltage reference. The comparator-only

TSM9119 and the TSM9120 have the same attributes

and only draw a supply current of 350nA. To insure

clean output switching behavior, all four analog

comparators feature 4mV internal hysteresis. The

TSM9117 and the TSM9119’s push-pull output

drivers were designed to minimize supply-current

surges while driving ±5mA loads with rail-to-rail

output

swings.

The

open-drain

output

stage

TSM9118 and TSM9120 can be connected to supply

voltages above VCC to an absolute maximum of 6V

above VEE. Where wired-OR logic connections are

needed, their open-drain output stages make it easy

to use these analog comparators.

Input Stage Circuitry

The robust design of the analog comparators’ input

stage can accommodate any differential input voltage

from VEE - 0.2V to VCC + 0.2V. Input bias currents are

typically ±0.15nA so long as the applied input voltage

remains between the supply rails. ESD protection

diodes - connected internally to the supply rails -

protect

comparator

inputs

against

overvoltage

conditions. However, if the applied input voltage

exceeds either or both supply rails, an increase in

input current can occur when these ESD protection

diodes start to conduct.

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TSM9120ESA+T Datasheet(PDF) 11 Page - Touchstone Semiconductor Inc

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