am79c974 Advanced Micro Devices, am79c974 Datasheet - Page 93

• Manufacturer Part Number: am79c974
• Description: Pcnettm-scsi Combination Ethernet And Scsi Controller For Pci Systems
• Manufacturer: Advanced Micro Devices

DC CHARACTERISTICS (continued)
SCSI Interface
Notes:
1. I
2. V
3. I
4. I
5. Outputs are CMOS and will be driven to rail if the load is not resistive.
6. These parameters are not 100% tested, but are evaluated at initial characterization and at any time the design is modified
7. Tested, but to values in excess of limits. Test accuracy not sufficient to allow screening guard bands.
8. Correlated to other tested parameters – not tested directly.
9. Test not implemented to data sheet specification.
SCSI and PWDN
Power Supply Current
Parameter
IDDSNOOZE
Symbol
IDDCOMA
I
I
where these parameters may be affected.
OL1
OL2
OL3
IL
OZL
VIHST
VOH
OH
VOL
VIH
VIL
IDD
IOZ
IIH
and I
IIL
applies to AD[31:00], C/ BE [3:0], PAR, and REQ
applies to FRAME , IRDY , TRDY , DEVSEL , STOP , SERR , PERR , and LOCK
applies to EESK/ LED1 , EEDO/ LED3 , and EEDI/ LNKST
and I
does not apply to open-drain output pins.
IH
OZH
apply to all input pins except XTAL1.
Parameter Description
Input High Voltage
All SCSI Inputs, PWDN
Input Low Voltage
All SCSI Inputs, PWDN
Input Hysteresis (Note 6)
All SCSI Inputs
Output High Voltage (Note 2)
SCSI Output Low Voltage
ATN, BSY, SEL,
SCSI^RST, ACK, SD [7:0], SDP
Input Low Leakage
All SCSI Inputs, PWDN
Input High Leakage
All SCSI Inputs, PWDN
High Impedance Leakage
All I/O Pins
Active Power Supply Current
Sleep Mode Power Supply Current
Auto Wake Mode Power Supply Current
apply to all three-state output pins and bi-directional pins.
P R E L I M I N A R Y
Am79C974
Test Conditions
4.75 V < VDD < 5.25 V
IOH = –2 mA (Note 5)
IOL = 48 mA
0.0 V < VIN < 2.7 V
2.7 V < VIN < VDD
0.4 V < VOUT < VDD
XTAL1 = 20 MHz, CLK = 33 MHz
SLEEP Active
Awake Bit Set Active
VSS –
Min
300
–10
–10
–10
VSS
2.0
0.5
2.4
VDD +
TBD
TBD
Max
+10
+10
+10
VDD
150
0.5
0.8
0.5
AMD
Unit
mV
mA
V
V
V
V
A
A
A
A
A
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