4.7 AC Programming Characteristics

Table 4-6. AC Programming Characteristics
Parameter	Symbol	Limits		Units	Test conditions
Parameter	Symbol	Minimum	Maximum	Units	Test conditions
Address Setup Time	t_AS	2	—	μs	Input rise and fall times (10% to 90%) 20 ns Input pulse levels 0.45V to 2.4V Input timing reference level 0.8V to 2.0V Output timing reference level 0.8V to 2.0V
OE Setup Time	t_OES	2	—	μs
Data Setup Time	t_DS	2	—	μs
Address Hold Time	t_AH	0	—	μs
Data Hold Time	t_DH	2	—	μs
OE High to Output Float Delay⁽²⁾	t_DFP	0	130	ns
V_PP Setup Time	t_VPS	2	—	μs
V_CC Setup Time	t_VCS	2	—	μs
CE Program Pulse Width⁽³⁾	t_PW	95	105	μs
Data Valid From OE⁽²⁾	t_OE	—	150	ns
V_PP Pulse Rise Time During Programming	t_PRT	50	—	ns

Note:

V_CC must be applied simultaneously with or before V_PP and removed simultaneously with or after V_PP.
This parameter is only sampled, and is not 100% tested. Output float is defined as the point where data is no longer driven. See timing diagram.
Program pulse width tolerance is 100 μs ± 5%.

AT27C256R