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PDF 74VCXH245 Data sheet ( Hoja de datos )
| Número de pieza | 74VCXH245 | |
| Descripción | Low-Voltage 1.8/2.5/3.3 V 8-Bit Transceiver | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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74VCXH245
Low−Voltage 1.8/2.5/3.3 V
8−Bit Transceiver
(3−State, Non−Inverting with Bushold)
The 74VCXH245 is an advanced performance, non−inverting 8−bit
transceiver. It is designed for very high−speed, very low−power
operation in 1.8 V, 2.5 V or 3.3 V systems.
The 74VCXH245 is designed as a byte control. The
Transmit/Receive (T/Rn) inputs determine the direction of data flow
through the bidirectional transceiver. Transmit (active−HIGH) enables
data from A ports to B ports; Receive (active−LOW) enables data from
B to A ports. The Output Enable input (OE), when HIGH, disables
both A and B ports by placing them in a HIGH Z condition. The data
inputs include active bushold circuitry, eliminating the need for
external pullup resistors to hold unused or floating inputs at a valid
logic state.
Features
• Designed for Low Voltage Operation: VCC = 1.65−3.6 V
• High Speed Operation: 3.5 ns max for 3.0 to 3.6 V
4.2 ns max for 2.3 to 2.7 V
8.4 ns max for 1.65 to 1.95 V
• Static Drive: ±24 mA Drive at 3.0 V
±18 mA Drive at 2.3 V
±6 mA Drive at 1.65 V
• Includes Active Bushold to Hold Unused or Floating Data Inputs at a
Valid Logic State
• Near Zero Static Supply Current in All Three Logic States (20 mA)
Substantially Reduces System Power Requirements
• Latchup Performance Exceeds ±200 mA @ 85°C
• ESD Performance:
Human Body Model >2000 V
Machine Model >200 V
• Pb−Free Package is Available
http://onsemi.com
MARKING
DIAGRAM
1
QFN
MNR2 SUFFIX
CASE 485AA
VCX
H245
ALYWG
G
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = Pb−Free Package
(Note: Microdot may be in either location)
19 12
20
PIN #1
QFN
11
10
2 Pinout (Top View) 9
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
© Semiconductor Components Industries, LLC, 2005
April, 2005 − Rev. 10
1
ORDERING INFORMATION
Device
Package
Shipping†
74VCXH245MNR2
QFN 3000/Tape&Reel
74VCXH245MNR2G QFN 3000/Tape&Reel
(Pb−Free)
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
Publication Order Number:
74VCXH245/D
1 page  
74VCXH245
AC CHARACTERISTICS (Note 7; tR = tF = 2.0 ns; CL = 30 pF; RL = 500 W)
Limits
Symbol
Parameter
TA = −40°C to +85°C
VCC = 3.0 V to 3.6 V VCC = 2.3 V to 2.7 V VCC = 1.65 V to1.95 V
Waveform Min Max Min Max
Min
Max
Unit
tPLH Propagation Delay
tPHL Input to Output
1
0.6 3.5 0.8 4.2
1.5
8.4 ns
0.6 3.5 0.8 4.2
1.5
8.4
tPZH Output Enable Time to
tPZL High and Low Level
2
0.6 4.5 0.8 5.6
1.5
9.8 ns
0.6 4.5 0.8 5.6
1.5
9.8
tPHZ
tPLZ
Output Disable Time From
High and Low Level
2
0.6 3.6 0.8 4.0
1.5
7.2 ns
0.6 3.6 0.8 4.0
1.5
7.2
tOSHL
tOSLH
Output−to−Output Skew
(Note 8)
0.5 0.5
0.5 0.5
0.75 ns
0.75
7. For CL = 50 pF, add approximately 300 ps to the AC maximum specification.
8. Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device.
The specification applies to any outputs switching in the same direction, either HIGH−to−LOW (tOSHL) or LOW−to−HIGH (tOSLH); parameter
guaranteed by design.
DYNAMIC SWITCHING CHARACTERISTICS
TA = +25°C
Symbol
Characteristic
Condition
Typ Unit
VOLP
Dynamic LOW Peak Voltage
(Note 9)
VCC = 1.8 V, CL = 30 pF, VIH = VCC, VIL = 0 V
VCC = 2.5 V, CL = 30 pF, VIH = VCC, VIL = 0 V
0.3 V
0.7
VCC = 3.3 V, CL = 30 pF, VIH = VCC, VIL = 0 V
1.0
VOLV
Dynamic LOW Valley Voltage
(Note 9)
VCC = 1.8 V, CL = 30 pF, VIH = VCC, VIL = 0 V
VCC = 2.5 V, CL = 30 pF, VIH = VCC, VIL = 0 V
−0.3 V
−0.7
VCC = 3.3 V, CL = 30 pF, VIH = VCC, VIL = 0 V
−1.0
VOHV
Dynamic HIGH Valley Voltage
(Note 10)
VCC = 1.8 V, CL = 30 pF, VIH = VCC, VIL = 0 V
VCC = 2.5 V, CL = 30 pF, VIH = VCC, VIL = 0 V
1.3 V
1.7
VCC = 3.3 V, CL = 30 pF, VIH = VCC, VIL = 0 V
2.0
9. Number of outputs defined as “n”. Measured with “n−1” outputs switching from HIGH−to−LOW or LOW−to−HIGH. The remaining output is
measured in the LOW state.
10. Number of outputs defined as “n”. Measured with “n−1” outputs switching from HIGH−to−LOW or LOW−to−HIGH. The remaining output is
measured in the HIGH state.
CAPACITIVE CHARACTERISTICS
Symbol
Parameter
CIN Input Capacitance
COUT
Output Capacitance
CPD Power Dissipation Capacitance
11. VCC = 1.8, 2.5 or 3.3 V; VI = 0 V or VCC.
Condition
Note 11
Note 11
Note 11, 10 MHz
Typical
6
7
20
Unit
pF
pF
pF
http://onsemi.com
5
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| PDF Descargar | [ Datasheet 74VCXH245.PDF ] | |
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