ATC20 데이터 시트보기 (PDF) - Atmel Corporation

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ATC20

Cell-based ASIC

Atmel Corporation 

IO25lib and IO33lib Low

Slew Rate Cells

The IO25lib (IO33lib) cells comprise a series of 1.8V/2.5V (1.8V/3.3V) input/output pads

developed for low supply voltage processes in order to interface 1.8V ASICs to 2.5V

(3.3V) environments.

All IO25lib (IO33lib) cells are slew rate controlled. Advantage has been taken of the

1.8V to 2.5V (3.3V) level shifter (slow by construction) to reduce the slew rate without

reducing speed.

Table 11. IO25lib/IO33lib Pads

3V Interface

Pad Name

3-State

I/O

Output

Only

3-State

Output Only

Input

Only

Drive

Strength

Pad Sites

Used

pc25b0x/pc33b0x

•

2 mA, 4 mA,

8 mA, 16 mA

1

pc25d00/pc33d00

•

1

pc25o0x/pc33o0x

•

2 mA, 4 mA,

8 mA, 16 mA

1

pc25t0x/pc33t0x

•

2 mA, 4 mA,

8 mA, 16 mA

1

Note: All 3-state I/Os, 3-state output only and input pads are also available with pull-up and

pull-down device.

Table 12. IO25lib/IO33lib Power Pads

Power Bus Connections

Cell Name

vssi

mixvss

vddi

pv25e00/pv33e00

•

pv25i00/pv33i00

•

pv25i25/pv33i25

•

pv25e33/pv33e33

pv25ecrn/pv33ecrn

•

mixvdd

•

•

Pad Sites Used

1

1

1

1

2

6 ATC20 Summary

1361BS–CBIC–09/02

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