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PDF 74LVTH32952GX Data sheet ( Hoja de datos )
| Número de pieza | 74LVTH32952GX | |
| Descripción | Low Voltage 32-Bit Registered Transceiver with 3-STATE Outputs (Preliminary) | |
| Fabricantes | Fairchild Semiconductor | |
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Preliminary
September 2000
Revised August 2001
74LVTH32952
Low Voltage 32-Bit Registered Transceiver
with 3-STATE Outputs (Preliminary)
General Description
The LVTH32952 is a 32-bit registered transceiver. Four
8-bit back to back registers store data flowing in both direc-
tions between two bidirectional buses. Separate clock,
clock enable, and output enable signals are provided for
each register.
The LVTH32952 data inputs include bushold, eliminating
the need for external pull-up resistors to hold unused
inputs.
The registered transceiver is designed for low voltage
(3.3V) VCC applications, but with the capability to provide a
TTL interface to a 5V environment.
The LVTH32952 is fabricated with an advanced BiCMOS
technology to achieve high speed operation similar to 5V
ABT while maintaining low power dissipation.
Features
s Input and output interface capability to systems at
5V VCC
s Bushold data inputs eliminate the need for external
pull-up resistors to hold unused inputs
s Live insertion/extraction permitted
s Power Up/Down high impedance provides glitch-free
bus loading
s Outputs source/sink −32 mA/+64 mA
s ESD performance:
Human-body model > 2000V
Machine model > 200V
Charged-device model > 1000V
s Packaged in plastic Fine-Pitch Ball Grid Array (FBGA)
(Preliminary)
Ordering Code:
Order Number Package Number
Package Description
74LVTH32952GX
(Note 1)
BGA114A 114-Ball Fine-Pitch Ball Grid Array (FBGA), JEDEC MO-205, 5.5mm Wide
(Preliminary) [TAPE and REEL]
Note 1: BGA package available in Tape and Reel only.
© 2001 Fairchild Semiconductor Corporation DS500411
www.fairchildsemi.com
1 page  
DC Electrical Characteristics (Continued)
Preliminary
Symbol
Parameter
ICCH
ICCL
ICCZ
ICCZ+
Power Supply Current
Power Supply Current
Power Supply Current
Power Supply Current
VCC1 or VCC2
VCC1 or VCC2
VCC1 or VCC2
VCC1 or VCC2
VCC
(V)
3.6
3.6
3.6
3.6
T A = −40°C to +85°C
Min Max
0.19
5
0.19
0.19
Units
mA
mA
mA
mA
∆ICC
Increase in Power Supply Current
(Note 7)
VCC1 or VCC2
3.6
0.2 mA
Note 5: An external driver must source at least the specified current to switch from LOW-to-HIGH.
Note 6: An external driver must sink at least the specified current to switch from HIGH-to-LOW.
Note 7: This is the increase in supply current for each input that is at the specified voltage level rather than VCC or GND.
Conditions
Outputs High
Outputs Low
Outputs Disabled
VCC ≤ VO ≤ 5.5V,
Outputs Disabled
One Input at VCC − 0.6V
Other Inputs at VCC or GND
Dynamic Switching Characteristics (Note 8)
Symbol
Parameter
VCC TA = 25°C
(V) Min Typ Max
VOLP
Quiet Output Maximum Dynamic VOL 3.3
0.8
VOLV
Quiet Output Minimum Dynamic VOL
3.3
−0.8
Note 8: Characterized in SSOP package. Guaranteed parameter, but not tested.
Note 9: Max number of outputs defined as (n). n−1 data inputs are driven 0V to 3V. Output under test held LOW.
Units
V
V
Conditions
CL = 50 pF, RL = 500Ω
(Note 9)
(Note 9)
AC Electrical Characteristics
Symbol
Parameter
fMAX
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
tW
tS
tH
Maximum Clock Frequency
Propagation Delay
CPBA or CPAB to A or B
Output Enable Time
OE to A or B
Output Disable Time
OE to A or B
Pulse Width, CPAB or CPBA HIGH or LOW
Setup Time
A or B before CPAB or CPBA
Hold Time
CEA or CEB before CPAB or CPBA
A or B after CPAB or CPBA
CEA or CEB after CPAB or CPBA
TA = −40°C to +85°C
CL = 50 pF, RL = 500Ω
VCC = 3.3 ± 0.3V
VCC = 2.7V
Min Max Min Max
150 150
1.3 4.4 1.3 4.7
1.3 4.8 1.3 5.0
1.0 4.3 1.0 4.9
1.0 4.8 1.0 5.7
2.1 5.7 2.1 6.2
2.1 5.1 2.1 5.3
3.3 3.3
1.7 2.5
2.0 2.8
0.8 0.0
0.4 0.0
Units
MHz
ns
ns
ns
ns
ns
ns
Capacitance (Note 10)
Symbol
Parameter
Conditions
CIN Input Capacitance
VCC = OPEN, VI = 0V or VCC
CI/O Input/Output Capacitance
VCC = 3.0V, VO = 0V or VCC
Note 10: Capacitance is measured at frequency f = 1 MHz, per MIL-STD-883, Method 3012.
Typical
4
8
Units
pF
pF
5 www.fairchildsemi.com
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