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PDF 74LCXH32245G Data sheet ( Hoja de datos )
| Número de pieza | 74LCXH32245G | |
| Descripción | Low Voltage 32-Bit Bidirectional Transceiver with 5V Tolerant Inputs and Outputs with Bushold | |
| Fabricantes | Fairchild Semiconductor | |
| Logotipo |  |
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April 2002
Revised August 2003
74LCXH32245
Low Voltage 32-Bit Bidirectional Transceiver
with 5V Tolerant Inputs and Outputs with Bushold
General Description
The LCXH32245 contains thirty-two non-inverting bidirec-
tional buffers with 3-STATE outputs and is intended for bus
oriented applications. The device is designed for low volt-
age (2.5V or 3.3V) VCC applications with capability of inter-
facing to a 5V signal environment. The device is byte
controlled. Each byte has separate control inputs which
could be shorted together for full 32-bit operation. The T/R
inputs determine the direction of data flow through the
device. The OE inputs disable both the A and B ports by
placing them in a high impedance state.
The LCXH32245 data inputs include bushold, eliminating
the need for external pull-up/down resistors to hold unused
inputs.
The LCXH32245 is fabricated with an advanced CMOS
technology to achieve high speed operation while maintain-
ing CMOS low power dissipation.
Features
s 5V tolerant inputs and outputs
s 2.3V to 3.6V VCC specifications provided
s 4.5 ns tPD max (VCC = 3.3V), 20 µA ICC max
s Power-off high impedance inputs and outputs
s Bushold on inputs eliminates the need for external
pull-up/down resistors
s Supports live insertion/withdrawal (Note 1)
s ±24 mA output drive (VCC = 3.0V)
s Uses patented noise/EMI reduction circuitry
s Latch-up performance exceeds 500 mA
s ESD performance:
Human body model > 2000V
Machine model > 200V
s Packaged in plastic Fine-Pitch Ball Grid Array (FBGA)
Note 1: To ensure the high-impedance state during power-up or down, OE
should be tied to VCC through a pull-up resistor: the minimum value or the
resistor is determined by the current-sourcing capability of the driver.
Ordering Code:
Order Number Package Number
Package Description
74LCXH32245G
(Note 2) (Note 3)
BGA96A
96-Ball Fine-Pitch Ball Grid Array (FBGA), JEDEC MO-205, 5.5mm Wide
Note 2: Ordering Code “G” indicates Trays.
Note 3: Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbol
© 2003 Fairchild Semiconductor Corporation DS500727
www.fairchildsemi.com
1 page  
DC Electrical Characteristics (Continued)
Symbol
Parameter
Conditions
II
II(HOLD)
Input Leakage Current
Bushold Input Minimum
Drive Hold Current
II(OD)
Bushold Input Over-Drive
Current to Change State
0 ≤ VI ≤ 5.5V
VIN = 0.7V
VIN = 1.7V
VIN = 0.8V
VIN = 2.0V
(Note 7)
(Note 8)
(Note 7)
(Note 8)
IOZ 3-STATE I/O Leakage
0 ≤ VO ≤ 5.5V
VI = VIH or VIL
IOFF Power-Off Leakage Current
VI or VO = 5.5V
ICC Quiescent Supply Current
VI = VCC or GND
3.6V ≤ VI, VO ≤ 5.5V (Note 9)
∆ICC
Increase in ICC per Input
VIH = VCC −0.6V
Note 7: An external driver must source at least the specified current to switch from LOW-to-HIGH.
Note 8: An external driver must sink at least the specified current to switch from HIGH-to-LOW.
Note 9: Outputs disabled or 3-STATE only.
VCC
(V)
2.3 − 3.6
2.3
3.0
2.7
3.6
2.3 − 3.6
0
2.3–3.6
2.3–3.6
2.3–3.6
TA = −40°C to +85°C
Min Max
±5.0
45
-45
75
−75
300
−300
450
−450
±5.0
10
20
±20
500
AC Electrical Characteristics
Symbol
Parameter
tPHL
tPLH
tPZL
tPZH
tPLZ
tPHZ
Propagation Delay
An to Bn or Bn to An
Output Enable Time
Output Disable Time
TA = −40°C to +85°C, RL = 500Ω
VCC = 3.3V ± 0.3V
VCC = 2.7V
VCC = 2.5V ± 0.2V
CL = 50 pF
CL = 50 pF
CL = 30 pF
Min Max Min Max Min Max
1.0 4.5 1.0 5.2 1.0 5.4
1.0 4.5 1.0 5.2 1.0 5.4
1.0 6.5 1.0 7.2 1.0 8.5
1.0 6.5 1.0 7.2 1.0 8.5
1.0 6.4 1.0 6.9 1.0 7.7
1.0 6.4 1.0 6.9 1.0 7.7
Dynamic Switching Characteristics
Symbol
Parameter
VOLP
Quiet Output Dynamic Peak VOL
VOLV
Quiet Output Dynamic Valley VOL
Capacitance
Conditions
CL = 50 pF, VIH = 3.3V, VIL = 0V
CL = 30 pF, VIH = 2.5V, VIL = 0V
CL = 50 pF, VIH = 3.3V, VIL = 0V
CL = 30 pF, VIH = 2.5V, VIL = 0V
VCC TA = 25°C
(V) Typical
3.3 0.8
2.5 0.6
3.3 −0.8
2.5 −0.6
Symbol
CIN
CI/O
CPD
Parameter
Input Capacitance
Input/Output Capacitance
Power Dissipation Capacitance
Conditions
VCC = Open, VI = 0V or VCC
VCC = 3.3V, VI = 0V or VCC
VCC = 3.3V, VI = 0V or VCC, f = 10 MHz
Typical
7
8
20
Units
µA
µA
µA
µA
µA
µA
Units
ns
ns
ns
Units
V
V
Units
pF
pF
pF
5 www.fairchildsemi.com
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