M87C257 STMICROELECTRONICS [STMicroelectronics], M87C257 Datasheet - Page 4

• Manufacturer Part Number: M87C257
• Description: ADDRESS LATCHED 256K 32K x 8 UV EPROM and OTP EPROM
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

M87C257
Table 5. AC Measurement Conditions
Figure 3. AC Testing Input Output Waveform
Table 6. Capacitance
Note: 1. Sampled only, not 100% tested.
System Considerations
The power switching characteristics of Advance
CMOS EPROMs require careful decoupling of the
devices. The supply current, I
ments that are of interest to the system designer:
the standby current level, the active current level,
and transient current peaks that are produced by
the falling and rising edges of E. The magnitude of
this transient current peaks is dependent on the
capacitive and inductive loading of the device at the
output. The associated transient voltage peaks can
be suppressed by complying with the two line
4/13
Input Rise and Fall Times
Input Pulse Voltages
Input and Output Timing Ref. Voltages
High Speed
Standard
Symbol
2.4V
0.4V
C
3V
0V
C
OUT
IN
Input Capacitance
Output Capacitance
(1)
Parameter
(T
A
= 25 C, f = 1 MHz )
CC
, has three seg-
1.5V
2.0V
0.8V
AI01822
High Speed
Test Condition
0 to 3V
V
1.5V
V
OUT
10ns
IN
Figure 4. AC Testing Load Circuit
output control and by properly selected decoupling
capacitors. It is recommended that a 0.1 F ceramic
capacitor be used on every device between V
and V
of low inherent inductance and should be placed
as close to the device as possible. In addition, a
4.7 F bulk electrolytic capacitor should be used
between V
bulk capacitor should be located near the power
supply connection point. The purpose of the bulk
capacitor is to overcome the voltage drop caused
by the inductive effects of PCB traces.
= 0V
= 0V
C L = 30pF for High Speed
C L = 100pF for Standard
C L includes JIG capacitance
DEVICE
SS
UNDER
TEST
. This should be a high frequency capacitor
CC
and V
Min
SS
1.3V
for every eight devices. The
1N914
3.3k
0.4V to 2.4V
0.8V and 2V
C L = 30pF or 100pF
Standard
Max
12
6
20ns
OUT
AI01823
Unit
pF
pF
CC