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ATC25 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 ATC25
기능 Cell-based ASIC
제조업체 ATMEL Corporation
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ATC25 데이터시트, 핀배열, 회로
Features
Comprehensive Library of Standard Logic Cells
ATC25 I/O Cells Designed to Operate with VDD = 2.5V ± 0.25V as Main Target Operating
Conditions
IO33 Pad Library Provides Interface to 3V Environment
Oscillators Provide Stable Clock Sources
Basic Analog Input/Output, Power, Ground and Multiplexer Cells Available,
High-performance Analog Cells Can Be Developed on Request
Memory Cells Compiled to the Precise Requirements of the Design
Compatible with Atmel’s Extensive Range of Microcontroller, DSP, Standard Interface
and Application Specific Cells
Description
The Atmel ATC25 CBIC family is fabricated on a proprietary 0.25 micron five-layer-
metal CMOS process intended for use with a supply voltage of 2.5V ± 0.25V. The fol-
lowing table shows the range for which Atmel library cells have been characterized.
Table 1. Recommended Operating Conditions
Symbol
Parameter
Conditions
VDD
VDD3
VI
VO
TEMP
DC Supply Voltage
DC Supply Voltage
DC Input Voltage
DC Output Voltage
Operating Free Air
Temperature Range
Core and Standard I/Os
3V Interface I/Os
Industrial
Min Typ Max Unit
2.25 2.5 2.75
V
3 3.3 3.6 V
0
VDD
V
0
VDD
V
-40 +85 °C
The Atmel cell libraries and megacell compilers have been designed in order to be
compatible with each other. Simulation representations exist for three types of operat-
ing conditions; they correspond to three characterization conditions defined as follows:
• MIN conditions:
TJ = -40°C
VDD (cell) = 2.75V
Process = fast (industrial best case)
• TYP conditions:
TJ = +25°C
VDD (cell) = 2.5V
Process = typ (industrial typical case)
• MAX conditions:
TJ = +100°C
VDD (cell) = 2.25V
Process = slow (industrial worst case)
Delays to tri-state are defined as delay to turn off (VGS < VT) of the driving devices.
Output pad drain current corresponds to the output current of the pad when the output
voltage is VOL or VOH. The output resistor of the pad and the voltage drop due to
access resistors (in and out of the die) are taken into account. In order to have accu-
rate timing estimates, all characterization has been run on electrical netlists extracted
from the layout database.
Cell-based ASIC
ATC25
Summary
Rev. 1306DS–CBIC–09/02
1




ATC25 pdf, 반도체, 판매, 대치품
Input/Output Pad Cell
Libraries
IO25lib and IO33lib
The Atmel Input/Output Cell Library, IO25lib, contains a comprehensive list of input, out-
put, bidirectional and tristate cells. The ATC25 (2.5V) cell library includes a special set
of I/O cells, IO33lib, for interfacing with external 3V devices.
Voltage Levels
The IO25lib library is made up exclusively of low-voltage chip interface circuits powered
by a voltage in the range of 2.25V to 2.75V. The library is compatible with the SClib 2.5-
volt standard cells library.
Power and Ground Pads
Designers are strongly encouraged to provide three kinds of power pairs for the IO25lib
library. These are “AC”, “DC” and core power pairs. AC power is used by the I/O to
switch its output from one state to the other. This switching generates noise in the AC
power buses on the chip. DC power is used by the I/O to maintain its output in a steady
state. The best noise performance is achieved when the DC power buses on the chip
are free of noise; designers are encouraged to use separate power pairs for AC and DC
power to prevent most of the noise in the AC power buses from reaching the DC power
buses. The same power pairs can be used to supply both DC power to the I/Os and
power to the core without affecting noise performance.
Table 6. VSS Power Pad Combinations
Core
Switching I/O
Quiet I/O
Vssi
VssAC
VssDC
••
••
•••
Library Cell
Name
pv25i00
pv25a00
pv25d00
pv25e00
pv25b00
pv25f00
Signal Name
VSS
VSS
VSS
VSS
VSS
VSS
Table 7. VDD Power Pad Combinations
Core
Switching I/O
Quiet I/O
Vddi
VddAC
VddDC
••
••
•••
Library Cell
Name
pv25i25
pv25a25
pv25d25
pv25e25
pv25b25
pv25f25
Signal Name
VDD
VDD
VDD
VDD
VDD
VDD
4 ATC25 Summary
1306DS–CBIC–09/02

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ATC25 전자부품, 판매, 대치품
ATC25 Summary
Oscillator Cell
Library Osc25lib
Crystal Oscillators
Basic Analog Cell
Library ANA25lib,
ANA33lib
The Atmel Oscillator Library provides stable clock sources. It comprises four oscillators
and one power-on-reset.
The Atmel two-pad oscillators are designed with the Pierce three-point oscillator struc-
ture. For the 32.768 Hz oscillator, the load capacitance must be between 6 pF and 12.5
pF For high-frequency oscillators, the load capactance must be between 15 pF and 20
pF. External capacitors must be added in order to obtain the correct load capacitance.
Clock output is high at off state (onosc = 0).
The oscillators provide a bypass mode (onosc = 1), clock = not (xin).
Table 13 gives the available oscillator cells.
Table 13. Oscillator and POR Cells
Cell Name
Description
OSC25f33K
Low-power, optimized for 32.786 kHz crystal
OSC25f9M
9 MHz crystal oscillator
OSC25f16M
16 MHz crystal oscillator
OSC25f27M
27 MHz crystal oscillator
POR25
Static and dynamic reset with internal hysterisis
The Atmel CBIC analog library makes the following parts available:
• Multiplexer modules
– Multiplexers to minimize cross-talk (for use with high-impedance nodes).
– Multiplexers to minimize ON resistance.
• Analog input and output cells
• Analog power and ground cells
A special set of basic analog I/O cells, ANA33lib, is available for interfacing with external
3.3V devices.
1306DS–CBIC–09/02
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