AM27C128-150DC Spansion Inc., AM27C128-150DC Datasheet - Page 6

• Manufacturer Part Number: AM27C128-150DC
• Manufacturer: Spansion Inc.

Specifications of AM27C128-150DC

• Interface Type: Parallel
• In System Programmable: In System/External
• 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

connection to all devices in the array and connected to
the READ line from the system control bus. This as-
sures that all deselected memory devices are in their
low-power standby mode and that the output pins are
only active when data is desired from a particular mem-
ory device.
System Applications
During the switch between active and standby condi-
tions, transient current peaks are produced on the ris-
ing and falling edges of Chip Enable. The magnitude of
MODE SELECT TABLE
Notes:
1. V
2. X = Either V
3. A1–A8 and A10–12 = 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
Manufacturer Code
Device Code
IH
0.5 V.
or V
IL
.
IL
, A13 = X
PP
V
CC
voltage during programming.
CE#
V
V
V
V
V
V
V
X
IH
IH
IL
IL
IL
IL
IL
0.3 V
Am27C128
OE#
V
V
V
V
V
X
X
X
X
IH
IL
IL
IL
IL
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
tion of the capacitor should be close to where the
power supply is connected to the array.
CC
and V
PGM#
V
V
X
X
X
X
X
X
X
IH
IL
CC
SS
and V
to minimize transient effects. In addition,
V
V
A0
X
X
X
X
X
X
X
IH
IL
SS
for each eight devices. The loca-
A9
V
V
X
X
X
X
X
X
X
H
H
V
V
V
V
X
X
X
X
X
X
PP
PP
PP
PP
Outputs
High Z
High Z
High Z
High Z
D
D
01h
16h
D
OUT
OUT
IN