Rainbow Electronics W49F020 - Manual (Page 11)

Preliminary W49F020
Publication Release Date: October 1999
- 11 - Revision A1
Power-up Timing
PARAMETER SYMBOL TYPICAL UNIT
Power-up to Read Operation T PU . READ 100
µ
S
Power-up to Write Operation T PU . WRITE 5 mS
CAPACITANCE
(V DD = 5.0V, T A = 25 ° C, f = 1 MHz)
PARAMETER SYMBOL CONDITIONS MAX. UNIT
I/O Pin Capacitance C I/O V I/O = 0V 12 pf
Input Capacitance C IN V IN = 0V 6 pf
AC CHARACTERISTICS
AC Test Conditions
PARAMETER CONDITIONS
Input Pulse Levels 0V to 3.0V
Input Rise/Fall Time < 5 nS
Input/Output Timing Level 1.5V/1.5V
Output Load 1 TTL Gate and C L = 100 pF for 90nS
C L = 30 pF for 70nS
AC Test Load and Waveform
+5V
1.8K
1.3K
D OUT
Ω
Ω
30 pF for 70nS
(Including Jig and
Scope)
Input
3V
0V
Test Point Test Point
1.5V 1.5V
Output
100 pF for 90nS