QU80386EXTC25 Intel, QU80386EXTC25 Datasheet - Page 30

• Manufacturer Part Number: QU80386EXTC25
• Description: IC INT PROC 5V 25MHZ 132QFP
• Manufacturer: Intel

Specifications of QU80386EXTC25

• Processor Type: 386EX
• Features: 32-bit, Extended Temp
• Speed: 25MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 132-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 863826

Intel386™ EX Embedded Microprocessor
6.3
30
Figure 8. Drive Levels and Measurement Points for AC Specifications (EXTC)
AC Specifications
Table 11 lists output delays, input setup requirements, and input hold requirements for the 5 V
EXTC processor; Table 12 is for the EXTB processor. All AC specifications are relative to the
CLK2 rising edge crossing the V
Figures 8 and 9 show the measurement points for AC specifications for the EXTB and EXTC
processors. Inputs must be driven to the indicated voltage levels when AC specifications are
measured. Output delays are specified with minimum and maximum limits measured as shown.
The minimum delay times are hold times provided to external circuitry. Input setup and hold times
are specified as minimums, defining the smallest acceptable sampling window. Within the
sampling window, a synchronous input signal must be stable for correct operation.
Outputs ADS#, W/R#, CS5:0#, UCS#, D/C#, M/IO#, LOCK#, BHE#, BLE#, REFRESH#/CS6#,
READY#, LBA#, A25:1, HLDA and SMIACT# change only at the beginning of phase one. D15:0
(write cycles) and PWRDOWN change only at the beginning of phase two. RD# and WR# change
to their active states at the beginning of phase two. RD# changes to its inactive state (end of cycle)
at the beginning of phase one. See the Intel386™ EX Embedded Microprocessor User's Manual for
a detailed explanation of early READY# vs. late READY#.
The READY#, HOLD, BUSY#, ERROR#, PEREQ, BS8#, and D15:0 (read cycles) inputs are
sampled at the beginning of phase one. The NA#, SMI#, and NMI inputs are sampled at the
beginning of phase two.
BLE#,ADS#,M/IO#
D/C#W/R#,LOCK#
HLDA, SMIACT#)
(READY#,HOLD
BUSY#,PEREQ
FLT#,ERROR#
LEGEND
a -
b - 2.0V
c = 1.5V
A - Maximum Output Delay Spec
B - Minimum Output Delay Spec
C - Minimum Input Setup Spec
D - Minimum Input Hold Spec
(A25:1,BHE#
(N/A#,INTR
D15:0,A20)
OUTPUTS
NMI,SMI#)
OUTPUTS
V
CC
INPUTS
INPUTS
(D15:0)
/2
CLK2
Valid
Output n
b
CC
/2 level for the EXTB, or 2.0 Volts for the EXTC.
B
a
Min
A
3.0V
PH1
0V
Max
a
c
C
Valid
Output n+1
Valid
Output n
Valid
Input
Tx
B
a
D
c
Min
A
3.0V
PH2
0V
Max
a
c
Valid
Output n+1
C
Valid
Input
D
c
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