STMICROELECTRONICS 74VHCT126AMTR

74VHCT126A

QUAD BUS BUFFERS (3-STATE)
PRELIMINARY DATA
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HIGH SPEED: tPD = 5 ns (TYP.) at VCC = 5V
LOW POWER DISSIPATION:
ICC = 4 µA (MAX.) at TA = 25 oC
COMPATIBLE WITH TTL OUTPUTS:
VIH = 2V (MIN), VIL = 0.8V (MAX)
POWER DOWN PROTECTION ON INPUTS &
OUTPUTS
SYMMETRICAL OUTPUT IMPEDANCE:
|IOH| = IOL = 8 mA (MIN)
BALANCED PROPAGATION DELAYS:
tPLH ≅ tPHL
OPERATING VOLTAGE RANGE:
VCC (OPR) = 4.5V to 5.5V
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 126
IMPROVED LATCH-UP IMMUNITY
LOW NOISE: VOLP = 0.8V (Max.)
DESCRIPTION
The 74VHCT126A is an advanced high-speed
CMOS QUAD BUS BUFFERS fabricated with
sub-micron silicon gate and double-layer metal
wiring C2MOS technology.
SOP
TSSOP
ORDER CODES
PACKAGE
T UBE
T& R
SOP
74VHCT126AM
74VHCT126AMTR
TSSOP
74VHCT126ATTR
This device requires the 3-STATE control input G
to be set low to place the output into the high
impedance state.
Power down protection is provided on all inputs
and outputs 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.
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
PIN CONNECTION AND IEC LOGIC SYMBOLS
March 2000
1/8
74VHCT126A
INPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
SYMBOL
NAME AND FUNCT ION
1, 4, 10, 13
1G to 4G
Output Enable Inputs
2, 5, 9, 12
1A to 4A
Data Inputs
3, 6, 8, 11
1Y to 4Y
Data Outputs
7
GND
Ground (0V)
14
VCC
Positive Supply Voltage
TRUTH TABLE
A
G
Y
X
L
Z
L
H
L
H
H
H
X:”H” or ”L”
Z: High Impedance
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
Supply Voltage
-0.5 to +7.0
V
VI
DC Input Voltage
-0.5 to +7.0
V
VO
DC Output Voltage (see note 1)
-0.5 to +7.0
V
VO
DC Output Voltage (see note 2)
-0.5 to VCC + 0.5
V
IIK
DC Input Diode Current
- 20
mA
IOK
DC Output Diode Current
± 20
mA
IO
DC Output Current
± 25
mA
± 50
mA
VCC
ICC or IGND DC VCC or Ground Current
Tstg
TL
Storage Temperature
Lead Temperature (10 sec)
-65 to +150
o
300
o
C
C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied.
1) Output in OFF State
2) High or Low State
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
4.5 to 5.5
V
Input Voltage
0 to 5.5
V
VO
Output Voltage (see note 1)
0 to 5.5
V
VO
Output Voltage (see note 2)
Top
Operating Temperature
dt/dv
Input Rise and Fall Time (see note 3) (V CC = 5.0 ± 0.5V)
1) Output in OFF State
2) High or Low State
3)VIN from0.8V to 2 V
2/8
Unit
VI
VCC
Supply Voltage
Valu e
0 to VCC
-40 to +85
0 to 20
V
o
C
ns/V
74VHCT126A
DC SPECIFICATIONS
Symb ol
Parameter
T est Cond ition s
Min.
2
VIH
High Level Input
Voltage
4.5 to 5.5
VIL
Low Level Input
Voltage
4.5 to 5.5
VOH
High Level Output
Voltage
VOL
IOZ
II
Value
T A = 25 o C
V CC
(V)
Typ .
Un it
-40 to 85 o C
Max.
Min .
Max.
2
0.8
V
0.8
V
4.5
I O =-50 µA
4.4
4.5
IO=-8 mA
3.94
Low Level Output
Voltage
4.5
I O=50 µA
0.1
0.1
4.5
IO=8 mA
0.36
0.44
High Impedance
Output Leakage
Current
4.5 to 5.5
VI = VIH or VIL
VO = 0V to 5.5V
±0.25
±2.5
µA
0 to 5.5
VI = 5.5V or GND
±0.1
±1.0
µA
Input Leakage Current
4.5
4.4
V
3.8
0.0
V
ICC
Quiescent Supply
Current
5.5
VI = VCC or GND
4
40
µA
∆ICC
Additional Worst Case
Supply Current
5.5
One Input at 3.4V,
other input at VCC or
GND
1.35
1.5
mA
IOPD
Output Leakage
Current
0
VOUT = 5.5V
0.5
5.0
µA
AC ELECTRICAL CHARACTERISTICS (Input t r = tf =3 ns)
Symb ol
Parameter
5.0(*)
15
Value
T A = 25 o C
Min. Typ . Max.
3.8
5.5
5.0
(*)
50
5.3
7.5
1.0
8.5
5.0(*)
5.0(*)
5.0(*)
15
50
50
3.6
5.1
6.1
5.1
7.1
8.8
1.0
1.0
1.0
6.0
8.0
10.0
V CC
(V)
tPLH
tPHL
Propagation Delay
Time
tPZL
tPZH
Output Enable Time
tPLZ
tPHZ
Output Disable Time
Test Co ndition
CL
(pF )
RL = 1KΩ
RL = 1KΩ
RL = 1KΩ
Un it
-40 to 85 o C
Min . Max.
1.0
6.5
ns
ns
ns
(*) Voltage range is 5.0V ± 0.5V
3/8
74VHCT126A
CAPACITIVE CHARACTERISTICS
Symb ol
Parameter
Test Co nditions
Valu e
T A = 25 oC
Min.
Un it
-40 to 85 o C
T yp.
Max.
Input Capacitance
4
10
COUT
Output Capacitance
10
pF
CPD
Power Dissipation
Capacitance (note 1)
14
pF
C IN
Min.
Max.
10
pF
1) CPD isdefined as the value of the IC’sinternal equivalent capacitance which is calculated fromthe operating current consumption without load. (Referto
Test Circuit).Average operting current can be obtained by the following equation. ICC(opr) = CPD • VCC • fIN + ICC/4(per circuit)
DYNAMIC SWITCHING CHARACTERISTICS
Symb ol
Parameter
T est Cond ition s
Dynamic Low Voltage
Quiet Output (note 1, 2)
5.0
VIHD
Dynamic High Voltage
Input (note 1, 3)
5.0
VILD
Dynamic Low Voltage
Input (note 1, 3)
5.0
VOLP
VOLV
Value
T A = 25 o C
V CC
(V)
Min.
-0.8
C L = 50 pF
Un it
-40 to 85 o C
Typ .
Max.
0.3
0.8
Min .
Max.
-0.3
2.0
V
0.8
1) Worst case package.
2) Max number of outputs defined as (n). Data inputs are driven 0V to 5.0V, (n -1) outputs switching and one output at GND.
3) Max number of data inputs (n) switching. (n-1) switching 0V to5.0V. Inputs under test switching: 5.0V to threshold (VILD), 0V to threshold (VIHD), f=1MHz.
TEST CIRCUIT
T EST
tPLH , tPHL
SW IT CH
Open
tPZL , tPLZ
VCC
tPZH , tPHZ
GND
CL = 15/50 pF or equivalent (includes jig and probe capacitance)
RL = R1 = 1KΩ orequivalent
RT = ZOUT of pulse generator (typically 50Ω)
4/8
74VHCT126A
WAVEFORM 1: PROPAGATION DELAYS (f=1MHz; 50% duty cycle)
WAVEFORM 2: OUTPUT ENABLE AND DISABLE TIME (f=1MHz; 50% duty cycle)
5/8
74VHCT126A
SO-14 MECHANICAL DATA
mm
DIM.
MIN.
TYP.
A
a1
inch
MAX.
MIN.
TYP.
1.75
0.1
0.068
0.2
a2
MAX.
0.003
0.007
1.65
0.064
b
0.35
0.46
0.013
0.018
b1
0.19
0.25
0.007
0.010
C
0.5
0.019
c1
45 (typ.)
D
8.55
8.75
0.336
0.344
E
5.8
6.2
0.228
0.244
e
1.27
e3
0.050
7.62
0.300
F
3.8
4.0
0.149
0.157
G
4.6
5.3
0.181
0.208
L
0.5
1.27
0.019
0.050
M
S
0.68
0.026
8 (max.)
P013G
6/8
74VHCT126A
TSSOP14 MECHANICAL DATA
mm
DIM.
MIN.
inch
TYP.
A
MAX.
MIN.
TYP.
MAX.
1.1
0.433
A1
0.05
0.10
0.15
0.002
0.004
0.006
A2
0.85
0.9
0.95
0.335
0.354
0.374
b
0.19
0.30
0.0075
0.0118
c
0.09
0.20
0.0035
0.0079
D
4.9
5
5.1
0.193
0.197
0.201
E
6.25
6.4
6.5
0.246
0.252
0.256
E1
4.3
4.4
4.48
0.169
0.173
0.176
e
0.65 BSC
0.0256 BSC
K
0o
4o
8o
0o
4o
8o
L
0.50
0.60
0.70
0.020
0.024
0.028
A
A2
A1
b
e
K
c
L
E
D
E1
PIN 1 IDENTIFICATION
1
7/8
74VHCT126A
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granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are
subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products
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