P R E L I M I N A R Y

AMD

 

 

AC CHARACTERISTICS

3.3V MEMORY BUS INTERFACE ABSOLUTE MAXIMUM RATINGS

Storage Temperature: . . . . . . . . . . . . –65 to +150 °C

Ambient Temperature Under Bias: . . . –65 to +125 °C

Supply Voltage to AVSS

or DVSS (AVDD, DVDD): . . . . . . . . . . . . . . –0.3 to +6 V

Stresses above those listed under Absolute Maximum Ratings may cause permanent device failure. Functionality at or above these limits is not implied. Exposure to Absolute Maximum Ratings for extended periods may affect device reliability.

OPERATING RANGES

Commercial (C) Devices

Temperature (TA) . . . . . . . . . . . . . . . . . 0°C to + 70°C

Supply Voltages (VCC,VDDT, VDDU1, VDDU2, VDDM, VDDP)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.0 V to 5.25 V

Supply Voltages

(AVDD, VDD5) . . . . . . . . . . . . . . . . . . . . . . . . +5 V ± 5%

All inputs within the range: VSS – 0.5 V VIN VDD + 0.1 X VDD – where V SS and VDD are appropriate reference pins for a given input pin. (See section on power supply pin descriptions.)

CL = 50 pF unless otherwise noted

Operating ranges define those limits between which the func- tionality of the device is guaranteed.

MEMORY BUS READ ACCESS

Parameter

 

 

 

 

 

Symbol

Parameter Description

Test Conditions

Min

Max

Unit

tmAD

MA[16:0] valid from CLKIN

 

2

100

ns

 

 

 

 

 

 

tmCD

CE active delay from CLKIN

Note 1

2

100

ns

tmOD

MOE active delay from CLKIN

 

2

100

ns

 

 

 

 

 

 

tmOLZ

MOE to MD[7:0] driven

0 wait states

0

70

ns

 

(Note 3)

1 wait state

 

170

ns

 

 

2 wait states

 

270

ns

tmAA

Address Read Access Time

0 wait states

 

120

ns

 

(Note 3)

1 wait state

 

220

ns

 

 

2 wait states

 

320

ns

tmACS

CE Read Access Time

0 wait states

 

120

ns

 

(Notes 1, 3)

1 wait state

 

220

ns

 

 

2 wait states

 

320

ns

tmOE

MOE Read Access Time

0 wait states

 

70

ns

 

(Note 3)

1 wait state

 

170

ns

 

 

2 wait states

 

270

ns

 

 

 

 

 

 

tmRI

CE Inactive Time

Notes 1, 2

0

 

ns

 

 

 

 

 

 

tmAH

MA[16:0] valid hold from MOE

Note 1

TCLKIN-10

 

ns

tmCH

CE valid hold from MOE

 

TCLKIN-10

 

ns

 

 

 

 

 

 

tmH

MD[7:0] valid hold from MOE

Note 2

0

 

ns

 

 

 

 

 

 

tmHZ

MD[7:0] inactive from MOE

Note 2

0

2 X TCLKIN-15

ns

Notes:

1.CE = one of: FCE, SCE, XCE

2.Parameter not included in the production test.

3.Value is dependent upon TCLKIN value. Value given is for CLKIN = 20 MHz.

Am79C930

139

Page 139
Image 139
AMD manual Am79C930 139