Page 1
SINGLE BUS BUFFER (3-STATE)
■ HIGHSPEED:t
■ LOW POWER DISSIPATION:
=1 µA (MAX.)at TA=25oC
I
CC
■ COMPATIBLEWITH TTL OUTPUTS:
=2V(MIN),VIL=0.8V(MAX)
V
IH
■ POWERDOWNPROTECTIONON INPUT
■ SYMMETRICALOUTPUTIMPEDANCE:
|=IOL=8 mA(MIN)
|I
OH
■ BALANCEDPROPAGATIONDELAYS:
t
≅ t
PLH
PHL
■ OPERATINGVOLTAGERANGE:
V
(OPR)= 4.5Vto 5.5V
CC
■ IMPROVEDLATCH-UPIMMUNITY
DESCRIPTION
The 74V1T126 is an advanced high-speed
CMOS SINGLE BUS BUFFER fabricated with
sub-micron silicon gate and double-layer metal
wiringC
2
MOStechnology.
=3.8ns(TYP.)atVCC=5V
PD
74V1T126
PRELIMINARY DATA
S
(SOT23-5L)
ORDERCODE:
74V1T126S 74V1T126C
3-STATE control input G has to be set LOW to
place the output into thehigh impedance state.
Power down protection is provided on all inputs
and 0 to 7V can be accepted on inputs with no
regard to the supply voltage. This device can be
used to interface 5V to 3V.
C
(SC-70)
PIN CONNECTION AND IEC LOGICSYMBOLS
October 1999
1/8
Page 2
74V1T126
INPUT EQUIVALENTCIRCUIT
PIN DESCRIPTION
PI N No SYMB OL NAME AND F U NCTIO N
1 1G Output Enable Input
2 1A Data Input
4 1Y Data Output
3 GND Ground (0V)
5V
CC
Positive Supply Voltage
TRUTH TABLE
AGY
XLZ
LHL
HHH
X:”H” or”L” Z:HighImpedance
ABSOLUTE MAXIMUM RATINGS
Symb o l Para met er Val u e Uni t
V
V
V
I
I
OK
I
or I
I
CC
T
T
AbsoluteMaximumRatingsarethosevaluesbeyondwhichdamageto thedevicemayoccur.Functionaloperation underthesecondition isnotimplied.
Supply Voltage -0.5 to +7.0 V
CC
DC Input Voltage -0.5 to +7.0 V
I
DC Output Voltage -0.5 to VCC+ 0.5 V
O
DC Input Diode Current - 20 mA
IK
DC Output Diode Current ± 20 mA
DC Output Current ± 25 mA
O
DC VCCor Ground Current ± 50 mA
GND
Storage Temperature -65 to +150
stg
Lead Temperature (10 sec) 260
L
o
C
o
C
RECOMMENDED OPERATINGCONDITIONS
Symb o l Para met er Value Un it
V
V
V
T
dt/dv
1)VINfrom0.8Vto2 V
2/8
Supply Voltage 4.5 to 5.5 V
CC
Input Voltage 0 to 5.5 V
I
Output Voltage 0 to V
O
Operating Temperature -40 to +85
op
Input Rise and Fall Time (see note 1) (V
=5.0±0.5V)
CC
CC
0 to 20 ns/V
V
o
C
Page 3
74V1T126
DC SPECIFICATIONS
Symb o l Para met er Test Co n diti o ns Val u e Uni t
T
V
CC
High Level Input
V
IH
(V)
4.5 to 5.5 2 2 V
Min. Typ. Max. Min. Max.
Voltage
V
IL
Low Level Input
4.5 to 5.5 0.8 0.8 V
Voltage
High Level Output
V
OH
Voltage
Low Level Output
V
OL
Voltage
High Impedance
I
OZ
Output Leakage
4.5 IO=-50 µA 4.4 4.5 4.4
4.5 I
=-8 mA 3.94 3.8
O
4.5 IO=50µA 0.0 0.1 0.1
4.5 I
5.5
=8 mA 0.36 0.44
O
VI=VIHor V
IL
VO=VCCor GND
Current
Input Leakage Current 0 to 5.5 VI= 5.5V or GND ±0.1 ±1.0 µA
I
I
Quiescent Supply
I
CC
5.5 VI=VCCorGND 1 10 µA
Current
∆I
Additional Worst Case
CC
Supply Current
5.5 One Input at 3.4V,
other input at V
CC
or
GND
=25oC -40 to 85oC
A
±0.25 ±2.5 µA
1.35 1.5 mA
V
V
AC ELECTRICAL CHARACTERISTICS
(Inputt
r=tf
=3 ns)
Symbol Parameter Test Condition Value Unit
(*)
t
Propagation Delay
PLH
t
Time
PHL
Output Disable Time 5.0 15 4.6 6.8 1.0 8.0
t
PLZ
t
PHZ
t
Output Enable Time 5.0 15 3.6 5.1 1.0 6.0
PZH
t
PZL
(*)Voltagerange is5V ± 0.5V
V
CC
(V)
C
(pF)
L
Min. Typ. Max. Min. Max.
5.0 15 3.8 5.5 1.0 6.5
5.0
50
5.0 50 6.1 8.8 1.0 10.0
5.0 50 5.1 7.1 1.0 8.0
=25oC -40 to 85oC
T
A
5.3 7.5 1.0 8.5
ns
ns
ns
CAPACITIVE CHARACTERISTICS
Symb o l Para met er Test Co n diti o ns Val u e Uni t
T
=25oC -40 to 85oC
A
Min. Typ. Max. Min. Max.
Input Capacitance 4 10 10
C
IN
C
Output Capacitance 10
OUT
Power Dissipation
C
PD
14 pF
Capacitance (note 1)
1)CPDisdefined asthevalue oftheIC’sinternal equivalentcapacitance whichis calculated fromtheoperatingcurrent consumptionwithout load.(Referto
TestCircuit).Average operatingcurrent canbeobtainedbythefollowingequation.I
(opr)= CPD• VCC• fIN+I
CC
CC
pF
pF
3/8
Page 4
74V1T126
TESTCIRCUIT
TEST SWITCH
t
PLH,tPHL
t
PZL,tPLZ
t
PZH,tPHZ
CL= 15/50 pF orequ ivalent (includes jigand probe capacitance)
R
=1KΩorequivalent
L=R1
R
ofpulse generator (typically50Ω)
T=ZOUT
Open
V
CC
GND
WAVEFORM1: PROPAGATIONDELAYS(f=1MHz;50% duty cycle)
4/8
Page 5
74V1T126
WAVEFORM2: OUTPUTENABLEAND DISABLE TIME
(f=1MHz; 50% duty cycle)
5/8
Page 6
74V1T126
SOT23-5L MECHANICAL DATA
DIM.
MIN. TYP. MAX. MIN. TYP. MAX.
A 0.90 1.45 35.4 57.1
A1 0.00 0.15 0.0 5.9
A2 0.90 1.30 35.4 51.2
b 0.35 0.50 13.7 19.7
C 0.09 0.20 3.5 7.8
D 2.80 3.00 110.2 118.1
E 2.60 3.00 102.3 118.1
E1 1.50 1.75 59.0 68.8
L 0.35 0.55 13.7 21.6
e 0.95 37.4
e1 1.9 74.8
mm mils
6/8
Page 7
SC-70 MECHANICAL DATA
74V1T126
DIM.
MIN. TYP. MAX. MIN. TYP. MAX.
A 0.80 1.10 31.5 43.3
A1 0.00 0.10 0.0 3.9
A2 0.80 1.00 31.5 39.4
b 0.15 0.30 5.9 11.8
C 0.10 0.18 3.9 7.1
D 1.80 2.20 70.9 86.6
E 1.80 2.40 70.9 94.5
E1 1.15 1.35 45.3 53.1
L 0.10 0.30 3.9 11.8
e 0.65 25.6
e1 1.3 51.2
mm mils
7/8
Page 8
74V1T126
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of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is
granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are
subject tochange without notice. Thispublication supersedes andreplaces all information previously supplied. STMicroelectronics products
are not authorized for use as critical components in life support devices or systems withoutexpress written approval of STMicroelectronics.
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1999 STMicroelectronics – Printed in Italy– All RightsReserved
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