MC74LVX4245 Motorola, MC74LVX4245 Datasheet - Page 6

• Manufacturer Part Number: MC74LVX4245
• Description: LOW-VOLTAGE CMOS
• Manufacturer: Motorola

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MC74LVX4245
before V CCA ). With a 7V/ s rate, the setup time was about
140ns. When all is said and done, the safest power–up
strategy is to simply power V CCA before V CCB . One more
4
MOTOROLA
Figure 4. MC74LVX4245 Fits Into a System with 3V Subsystem and 5V Subsystem
Figure 5. MC74LVX4245 Pin Arrangement Is Compatible to 20–Pin 74 Series ‘245s
TRANSCEIVERS
CONTROLLER
CONTROLLER
CONTROLLER
KEYBOARD
PCMCIA
SUPER
LOGIC
CORE
VGA
I/O
5V
MICROCHANNEL/
EISA/ISA/AT
(T/R) DIR
5V BUS
V CCA
GND
GND
A0
A1
A2
A3
A4
A5
A6
A7
A PORT
A0:7
V CCA
5V
STANDARD
MC74LVX4245
74 SERIES
LVX4245
‘245
6
note: if the V CCB ramp rate is faster than the V CCA ramp rate
then power problems might still occur, even if the V CCA
power–up began prior to the V CCB power–up.
3V
V CCB
B PORT
B0:7
3V BUS
V CCB
V CCB
OE
B0
B1
B2
B3
B4
B5
B6
B7
GND
LOCAL
3V
LVX Data — Low–Voltage CMOS Logic
MEMORY
DRIVER
386/486
CACHE
SRAM
ROM
BIOS
CPU
BR1492 — Rev 0