D ts e t
aa h e
R c e t r lc r nc
o h se Ee to is
Ma u a t r dCo o e t
n fc u e
mp n n s
R c e tr b a d d c mp n ns ae
o h se rn e
o oet r
ma ua trd u ig ete dewaes
n fcue sn i r i/ fr
h
p rh s d f m te oiia s p l r
uc a e r
o h r n l u pi s
g
e
o R c e tr waes rce td f m
r o h se
fr e rae r
o
te oiia I. Al rce t n ae
h
r nl P
g
l e rai s r
o
d n wi tea p o a o teOC
o e t h p rv l f h
h
M.
P r aetse u igoiia fcoy
at r e td sn r n la tr
s
g
ts p o rmso R c e tr e eo e
e t rga
r o h se d v lp d
ts s lt n t g aa te p o u t
e t oui s o u rne
o
rd c
me t o e c e teOC d t s e t
es r x e d h
M aa h e.
Qu l yOv riw
ai
t
e ve
• IO- 0 1
S 90
•A 92 cr ct n
S 1 0 et ai
i
o
• Qu l e Ma ua trr Ls (
ai d
n fcues it QML MI- R -
) LP F
385
53
•C a sQ Mitr
ls
lay
i
•C a sVS a eL v l
ls
p c ee
• Qu l e S p l r Ls o D sr uos( L )
ai d u pi s it f it b tr QS D
e
i
•R c e trsacic l u pir oD A a d
o h se i
r ia s p l t L n
t
e
me t aln u t a dD A sa d r s
es lid sr n L tn ad .
y
R c e tr lcrnc , L i c mmi e t
o h se Ee t is L C s o
o
tdo
t
s p ligp o u t ta s t f c so r x e t-
u pyn rd cs h t ai y u tme e p ca
s
t n fr u lya daee u loto eoiial
i s o q ai n r q a t h s r n l
o
t
g
y
s p l db id sr ma ua trr.
u pi
e yn ut
y n fcues
T eoiia ma ua trr d ts e t c o a yn ti d c me t e e t tep r r n e
h r n l n fcue’ aa h e a c mp n ig hs o u n r cs h ef ma c
g
s
o
a ds e ic t n o teR c e tr n fcue v rino ti d vc . o h se Ee t n
n p c ai s f h o h se ma ua trd eso f hs e ie R c e tr lcr -
o
o
isg aa te tep r r n eo i s mio d co p o u t t teoiia OE s e ic -
c u rne s h ef ma c ft e c n u tr rd cs o h r n l M p c a
o
s
g
t n .T pc lv le aefr eee c p r o e o l. eti mii m o ma i m rt g
i s ‘y ia’ au s r o rfrn e up s s ny C r n nmu
o
a
r xmu ai s
n
ma b b s do p o u t h rceiain d sg , i lt n o s mpetsig
y e a e n rd c c aa tr t , e in smuai , r a l e t .
z o
o
n
© 2 1 R cetr l t n s LC Al i t R sre 0 1 2 1
0 3 ohs E cr i , L . lRg s eevd 7 1 0 3
e e oc
h
T l r m r, l s v iw wrcl . m
o e n oe p ae it w . e c o
a
e
s
o ec
TLC7701, TLC7725, TLC7703
TLC7733, TLC7705
www.ti.com
SLVS087M – DECEMBER 1994 – REVISED MARCH 2012
Micropower Supply Voltage Supervisors
Check for Samples:
TLC7701, TLC7725, TLC7703
,
TLC7733, TLC7705
1
FEATURES
Power-On Reset Generator
Automatic Reset Generation After Voltage
Drop
Precision Voltage Sensor
Temperature-Compensated Voltage Reference
Programmable Delay Time by External
Capacitor
Supply Voltage Range . . . 2 V to 6 V
Defined RESET Output from V
DD
≥
1 V
Power-Down Control Support for Static RAM
With Battery Backup
Maximum Supply Current of 16 µA
Power Saving Totem-Pole Outputs
Temperature Range . . . Up to –55°C to 125°C
DRB PACKAGE
•
•
•
•
•
•
•
•
•
•
•
APPLICATIONS
•
Medical Imaging
DESCRIPTION
The TLC77xx family of micropower supply voltage
supervisors provide reset control, primarily in
microcomputer and microprocessor systems.
During power-on, RESET is asserted when V
DD
reaches 1 V. After minimum V
DD
(≥2 V) is
established, the circuit monitors SENSE voltage and
keeps the reset outputs active as long as SENSE
voltage (V
I(SENSE)
) remains below the threshold
voltage. An internal timer delays return of the output
to the inactive state to ensure proper system reset.
The delay time, t
d
, is determined by an external
capacitor:
t
d
= 2.1 × 10
4
× C
T
Where
C
T
is in farads
t
d
is in seconds
SPACER
Except for the TLC7701, which can be customized with two external resistors, each supervisor has a fixed sense
threshold voltage set by an internal voltage divider. When SENSE voltage drops below the threshold voltage, the
outputs become active and stay in that state until SENSE voltage returns above threshold voltage and the delay
time, t
d
, has expired.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 1994–2012, Texas Instruments Incorporated
TLC7701, TLC7725, TLC7703
TLC7733, TLC7705
SLVS087M – DECEMBER 1994 – REVISED MARCH 2012
www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
DESCRIPTION (CONTINUED)
In addition to the power-on-reset and undervoltage-supervisor function, the TLC77xx adds power-down control
support for static RAM. When CONTROL is tied to GND, RESET will act as active high. The voltage monitor
contains additional logic intended for control of static memories with battery backup during power failure. By
driving the chip select (CS) of the memory circuit with the RESET output of the TLC77xx and with the CONTROL
driven by the memory bank select signal (CSH1) of the microprocessor (see
Figure 10),
the memory circuit is
automatically disabled during a power loss. (In this application the TLC77xx power has to be supplied by the
battery.)
The TLC77xxI is characterized for operation over a temperature range of –40°C to 85°C; the TLC77xxQ is
characterized for operation over a temperature range of –40°C to 125°C; and the TLC77xxM is characterized for
operation over the full Military temperature range of –55°C to 125°C.
The 3x3 mm DRB package is also available as a non-magnetic package for medical imaging application.
AVAILABLE OPTIONS
PACKAGED DEVICES
T
A
THRESHOLD
VOLTAGE
(V)
1.1
2.25
–40°C to
85°C
2.63
2.93
4.55
1.1
1.1
2.25
–40°C to
125°C
2.63
2.93
4.55
–55°C to
125°C
2.93
4.55
SMALL
OUTLINE (D)
(1)
TCLC7701ID
TLC7725ID
TLC7703ID
TLC7733ID
TLC7705ID
TLC7701IDBR
TLC7701QD
TLC7725QD
TLC7703QD
TLC7733QD
TLC7705QD
—
—
CHIP
CARRIER
(FK)
—
—
—
—
—
—
—
—
—
—
—
—
—
CERAMIC
DIP
(JG)
—
—
—
—
—
—
—
—
—
—
—
—
—
CERAMIC
PLASTIC DIP
DUAL
(P)
FLATPACK (U)
—
—
—
—
—
—
—
—
—
—
—
—
—
TCLC7701IP
TLC7725IP
TLC7703IP
TLC7733IP
TLC7705IP
—
TLC7701QP
TLC7725QP
TLC7703QP
TLC7733QP
TLC7705QP
—
—
THIN SHRINK
SMALL OUTLINE
(PW)
(2)
TCLC7701IPWR
TLC7725IPWR
TLC7703IPWR
TLC7733IPWR
TLC7705IPWR
—
TLC7701QPWR
TLC7725QPWR
TLC7703QPWR
TLC7733QPWR
TLC7705QPWR
—
—
SMALL OUTLINE
NO LEAD
(DRB)
—
—
—
—
—
TLC7701IDRBT-NM
—
—
—
—
—
—
—
(1)
(2)
The D package is available taped and reeled. Add the suffix R to the device type when ordering (e.g., TLC7705QDR).
The PW package is only available left-end taped and reeled (indicated by the R suffix on the device type; e.g., TLC7705QPWR).
Table 1. FUNCTION TABLE
CONT
ROL
L
L
L
L
H
H
H
H
(1)
RESIN
L
L
H
H
L
L
H
H
V
I(SENSE)
>V
IT+
False
True
False
True
False
True
False
True
RESE
T
H
H
H
L
(1)
H
H
H
H
RESET
L
L
L
H
(1)
L
L
L
H
(1)
RESET and RESET states shown are valid for t > t
d
.
2
Submit Documentation Feedback
Copyright © 1994–2012, Texas Instruments Incorporated
Product Folder Link(s):
TLC7701, TLC7725, TLC7703 TLC7733, TLC7705
TLC7701, TLC7725, TLC7703
TLC7733, TLC7705
www.ti.com
SLVS087M – DECEMBER 1994 – REVISED MARCH 2012
LOGIC SYMBOL
(1)
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
Copyright © 1994–2012, Texas Instruments Incorporated
Submit Documentation Feedback
3
Product Folder Link(s):
TLC7701, TLC7725, TLC7703 TLC7733, TLC7705
TLC7701, TLC7725, TLC7703
TLC7733, TLC7705
SLVS087M – DECEMBER 1994 – REVISED MARCH 2012
www.ti.com
FUNCTIONAL BLOCK DIAGRAM
TIMING DIAGRAM
4
Submit Documentation Feedback
Copyright © 1994–2012, Texas Instruments Incorporated
Product Folder Link(s):
TLC7701, TLC7725, TLC7703 TLC7733, TLC7705
京公网安备 11010802033920号
EEWORLD
