AT27C256R70PC Atmel, AT27C256R70PC Datasheet - Page 5

• Manufacturer Part Number: AT27C256R70PC
• Manufacturer: Atmel

Specifications of AT27C256R70PC

• Density: 256Kb
• Organization: 32Kx8
• Interface Type: Parallel
• Bus Type: Parallel
• In System Programmable: External
• Access Time (max): 70ns
• Package Type: PDIP
• Reprogramming Technique: OTP
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Supply Current: 20mA
• Pin Count: 28
• Mounting: Through Hole
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Lead Free Status / RoHS Status: Not Compliant

AC Waveforms for Read Operation
Notes:
Input Test Waveforms and
Measurement Levels
Pin Capacitance
f = 1 MHz, T = 25°C
Note:
For -45 and -55 devices only:
For -70, -90, -12, and -15 devices:
Symbol
C
C
IN
OUT
t
t
R
R
, t
, t
1.
2.
3.
4.
5.
1. Typical values for nominal supply voltage. This parameter is only sampled and is not 100% tested.
F
F
< 5 ns (10% to 90%)
< 20 ns (10% to 90%)
Timing measurement reference level is 1.5V for -45 and -55 devices. Input AC drive levels are V
Timing measurement reference levels for all other speed grades are V
V
OE may be delayed up to t
OE may be delayed up to t
This parameter is only sampled and is not 100% tested.
Output float is defined as the point when data is no longer driven.
IL
= 0.45V and V
(1)
Typ
4
8
IH
= 2.4V.
CE
ACC
- t
- t
OE
OE
after the falling edge of CE without impact on t
after the address is valid without impact on t
Max
(1)
12
6
Output Test Load
OL
Note:
= 0.8V and V
Units
pF
pF
ACC
CE
C
capacitance, except for
the -45 and -55 devices,
where C
.
L
.
= 100 pF including jig
OH
= 2.0V. Input AC drive levels are
L
= 30 pF.
IL
= 0.0V and V
Conditions
V
V
OUT
IN
= 0V
= 0V
IH
= 3.0V.
5