AM27C512-150DC Spansion Inc., AM27C512-150DC Datasheet - Page 6

• Manufacturer Part Number: AM27C512-150DC
• Manufacturer: Spansion Inc.

Specifications of AM27C512-150DC

• Organization: 64Kx8
• Interface Type: Parallel
• In System Programmable: In System/External
• Frequency (max): Not RequiredMHz
• Access Time (max): 150ns
• Package Type: CDIP
• Reprogramming Technique: UV
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Supply Current: 25mA
• Pin Count: 28
• Mounting: Through Hole
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Lead Free Status / Rohs Status: Not Compliant

CE# should be decoded and used as the primary de-
vice-selecting function, while OE#/V
mon connection to all devices in the array and
connected to the READ line from the system control
bus. This assures that all deselected memory devices
are in their low-power standby mode and that the out-
put pins are only active when data is desired from a
particular memory device.
System Applications
During the switch between active and standby condi-
tions, transient current peaks are produced on the ris-
MODE SELECT TABLE
Notes:
1. V
2. X = Either V
3. A1–A8 and A10–15 = V
4. See DC Programming Characteristics for V
6
Mode
Read
Output Disable
Standby (TTL)
Standby (CMOS)
Program
Program Verify
Program Inhibit
Autoselect
(Note 3)
H
= 12.0 V
IH
Manufacturer Code
Device Code
0.5 V.
or V
IL
.
IL
PP
be made a com-
PP
voltage during programming.
V
CC
CE#
V
V
V
V
V
V
V
X
Am27C512
IH
IH
IL
IL
IL
IL
IL
0.3 V
ing and falling edges of Chip Enable. The magnitude of
these transient current peaks is dependent on the out-
put capacitance loading of the device. At a minimum, a
0.1 µF ceramic capacitor (high frequency, low inherent
inductance) should be used on each device between
V
to overcome the voltage drop caused by the inductive
effects of the printed circuit board traces on EPROM ar-
rays, a 4.7 µF bulk electrolytic capacitor should be
used between V
location of the capacitor should be close to where the
power supply is connected to the array.
CC
OE#/V
and V
V
V
V
V
V
V
V
X
X
PP
PP
IH
IL
IL
IL
IL
PP
SS
to minimize transient effects. In addition,
CC
V
A0
V
X
X
X
X
X
X
X
and V
IH
IL
SS
for each eight devices. The
A9
V
V
X
X
X
X
X
X
X
H
H
Outputs
High Z
High Z
High Z
High Z
D
D
01h
91h
D
OUT
OUT
IN