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| AT49LW040 Datasheet, PDF (26/34 Pages) ATMEL Corporation – 8-megabit and 4-megabit Firmware Hub Flash Memory | |||
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Interface Measurement Condition Parameters
Symbol
Vth(1)
Vtl(1)
Vtest
Vmax(1)
Input Signal Edge Rate
Value
0.6 VCC
0.2 VCC
0.4 VCC
0.4 VCC
1 V/ns
Units
V
V
V
V
Note:
1. The input test environment is done with 0.1 VCC of overdrive over VIH and VIL. Timing parameters must be met with no more
overdrive than this. Vmax specifies the maximum peak-to-peak waveform allowed for measuring the input timing. Production
testing may use different voltage values, but must correlate results back to these parameters.
Reset Operations
Symbol
tPLPH(1)
Parameter
RST or INIT Pulse Low Time (If RST or INIT is tied to VCC, this
specification is not applicable)
Min
Max
Unit
100
ns
Note: 1. A reset latency of 20 µs will occur if a reset procedure is performed during a programming or erase operation.
AC Waveform for Reset Operation
RST VIH
VIL
tPLPH
Sector Programming Times
Parameter
Byte Program Time(2)
Sector Program Time(2)
Sector Erase Time(2)
3.3V VPP
Typ(1)
30.0
2.0
0.8
Max
300
20.0
1.0
Typ(1)
12V VPP
12.0
0.8
0.35
Max
125
8.0
0.5
Unit
µs
sec
sec
Notes: 1. Typical values measured at TA = +25°C and nominal voltages.
2. Excludes system-level overhead.
26 AT49LW080/040
1966CâFLASHâ03/02
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