S1K50000 Epson Electronics America, Inc., S1K50000 Datasheet - Page 106

• Manufacturer Part Number: S1K50000
• Description: Design Guide S1k50000 Series
• Manufacturer: Epson Electronics America, Inc.

9.2 Power Supplies in a Dual-Power-Supply System
9.3 Dual-Power-Supply-Type Input/Output Buffers
STANDARD CELL S1K50000 SERIES
DESIGN GUIDE
To apply two different power supplies, use two power-supply cells: HV
as the power supply for the HV
for the LV
must always meet the following requirement:
If HV
conditions are recommended:
S1K50000-series usage example with two power supplies
When operating with a dual-power-supply system, use dedicated dual-power-supply input/
output buffers. Be aware that single-power-supply input/output buffers cannot be used in a
dual-power-supply system. Therefore, single-power-supply input/output buffers cannot be
used in combination with dedicated dual-power-supply input/output buffers. An exception is
the test-use buffer (XITST1), which can be used for both dual- and single-power-supply
systems.
DD
< LV
DD
• HV
• HV
HV
system input/output buffers and internal cells. These two power-supply voltages
DD
Figure 9-1 S1K50000-Series Usage Example with Two Power Supplies
DD
DD
DD
, device operation cannot be guaranteed. The following two operating
= 5.0 V, LV
= 3.3 V, LV
LV
DD
operating
operating
DD
DD
at 5.0 V
at 3.3 V
DD
IC
IC
= 3.3 V
= 2.0 V
system input/output buffers, and LV
EPSON
Chapter 9: Precautions on the Use of Dual Power Supplies
5.0 V
operating voltage
S1K50000 series
Internal
3.3 V
3.3 V
DD
DD
and LV
as the power supply
DD
. Use HV
101
DD