
STD130
4-140
Samsung ASIC
PCI BUFFERS
Overview
PCI buffers are designed for PCI local bus application which is intended for high-performance 32-bit or 64-bit
bus architecture.
SEC supports PCI input, output and bi-directional buffers for 3.3V and 5V signaling environment.
Features
—
—
—
—
Low-power, high performance CMOS technology
Input, output, and bi-directional PCI buffers
Operating at up to 66MHz, including 33MHz
Electrically compliant interface in 3.3V and 5V bus environments
Description
These PCI buffers are designed for 3.3V and 5V environments. These buffers are compliant with the PCI
local bus specification rev2.2. The PCI buffers for 66MHz can be available in 33MHz interface, but require
more power pads due to their fast and noisy characteristics. The 5V tolerant PCI buffers can be used for
33MHz, 5V environment. These tolerant PCI buffers require 5V power for bulk of PMOS driver for 5V bus
environment or 3.3V power for 3.3V environment. The 5V tolerant PCI drivers support 5V environment while
EN5V is low. Although tolerant PCI buffers support 5V environment, they do not drive 5V.
NOTE:
If you want to use PCI buffers, please contact Samsung.
Cell List
3.3V Signaling PCI I/Os
5V Signaling PCI I/Os
NOTE1:
3.3V signaling conditions: EN5V=high, VIO=3.3V, In this case 5V tolerant is not supported.
5V signaling conditions: EN5V=low, VIO=5V, and 5V tolerant is supported.
NOTE2:
In 3.3V signaling, the voltage of VIO is 3.3V, which is provided through the VDD5O_PCI power cell.
In 5V signaling, the voltage of VIO is 5V, which is provided through the VDD5O_PCI power cell.
Cell Name
Description
Operating Frequency
VIO
(note2)
Voltage
Operating
Voltage
PTBPCI3
Bi-direction
Up to 66MHz at 3.3V signaling
(note1)
3.3V
3.3V
PTOPCI3
Driver
Up to 66MHz at 3.3V signaling
PTIPCI3
Receiver
Up to 66MHz at 3.3V signaling
Cell Name
Description
Operating Frequency
VIO
(note2)
Voltage
Operating
Voltage
PTBPCI5
Bi-direction
Up to 33MHz at 5V signaling
(note1)
5V
3.3V
PTOPCI5
Driver
Up to 33MHz at 5V signaling
PTIPCI5
Receiver
Up to 33MHz at 5V signaling