®

AS7C33256PFS16A

AS7C33256PFS18A

3/14/01; V.1.0

Alliance Semiconductor

P. 5 of 11

TQFP thermal resistance

* This parameter is sampled.

DC electrical characteristics

DC electrical characteristics for 2.5V I/O operation

Timing characteristics over operating range

Description

Conditions

Symbol

Typical

Units

Thermal resistance

(junction to ambient)

*

Test conditions follow standard test

methods and procedures for measuring

thermal impedance, per EIA/JESD51

θ

JA

46

°C/W

Thermal resistance

θ

JC

2.8

°C/W

Parameter

Symbol

Test conditions

–166

–150

–133

–100

Unit

Min

Max

Min

Max

Min

Max

Min

Max

Input leakage

* LBO pin has an internal pull-up and input leakage = ±10

µa.

Note: ICC give with no output loading. ICC increases with faster cycle times and greater output loading.

–2–

2

–2

–2

µA

Output leakage

current

OE

≥ V

–2–

2

–2

–2

µA

Operating power

supply current

–

475

–450

–425

–325

mA

Standby power

supply current

–

130

–110

–100

–

90

mA

Deselected, f = 0, ZZ

≤ 0.2V

–

30

–

30

–

30

–

30

–

30

–

30

–

30

–

30

Output voltage

–

0.4

–

0.4

–

0.4

–

0.4

V

2.4

–

2.4

–

2.4

–

2.4

–

Parameter

Symbol

Test conditions

–166

–150

–133

–100

Unit

Min

Max

Min

Max

Min

Max

Min

Max

Output leakage

current

OE

≥ V

–1

1–11–11–11

µA

Output voltage

–

0.7

–

0.7

–

0.7

–

0.7

V

1.7

–

1.7

–

1.7

–

1.7

–

Parameter

Symbol

–166

–150

–133

–100

Unit

Notes*

MinMax

MinMax

MinMax

MinMax

Clock frequency

–

166

–

150

–

133

–

100

MHz

Cycle time (pipelined mode)

6

–

6.6

–

7.5

–

10

–

ns

Cycle time (flow-through mode)

10

–10–12

–12–

ns

Clock access time (pipelined mode)

–3.5

–

3.8

–4.0

–5.0

ns