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PDF M27C512 Data sheet ( Hoja de datos )
| Número de pieza | M27C512 | |
| Descripción | 512 Kbit 64Kb x8 UV EPROM and OTP EPROM | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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M27C512
512 Kbit (64K x8) UV EPROM and OTP EPROM
Features
■ 5V ± 10% supply voltage in read operation
■ Access time: 45 ns
■ Low power “CMOS” consumption:
– Active current 30 mA
– Standby current 100 µA
■ Programming voltage: 12.75 V ± 0.25 V
■ Programming time around 6 s.
■ Electronic Signature
– Manufacturer code: 20h
– Device code: 3Dh
■ Packages
– ECOPACK® versions
28
1
FDIP28W (F)
28
1
PDIP28 (B)
PLCC32 (C)
Table 1.
Package
PDIP28
PLCC32
Device summary
45 ns
70 ns
90 ns
M27C512-90B6
M27C512-70C6 M27C512-90C1
100 ns
M27C512-
10C6
M27C512-90F1
FDIP28W M27C512-45XF1 M27C512-70XF1
M27C512-90F6
M27C512-
10F1
120 ns
M27C512-
12C3
M27C512-
12F1
M27C512-
12F3
150 ns
M27C512-15F1
M27C512-15F6
May 2007
Rev 3
1/22
www.st.com
1
1 page  
M27C512
2 Device operation
Device operation
The modes of operations of the M27C512 are listed in the Operating Modes table. A single
power supply is required in the read mode. All inputs are TTL levels except for GVPP and
12V on A9 for Electronic Signature.
2.1
2.2
Read mode
The M27C512 has two control functions, both of which must be logically active in order to
obtain data at the outputs. Chip Enable (E) is the power control and should be used for
device selection. Output Enable (G) is the output control and should be used to gate data to
the output pins, independent of device selection. Assuming that the addresses are stable,
the address access time (tAVQV) is equal to the delay from E to output (tELQV). Data is
available at the output after a delay of tGLQV from the falling edge of G, assuming that E has
been low and the addresses have been stable for at least tAVQV-tGLQV.
Standby mode
The M27C512 has a standby mode which reduces the active current from 30mA to 100µA
The M27C512 is placed in the standby mode by applying a CMOS high signal to the E input.
When in the standby mode, the outputs are in a high impedance state, independent of the
GVPP input.
Table 3. Operating modes(1)
Mode
E
GVPP
A9 Q7-Q0
Read
VIL
Output Disable
VIL
Program
VIL Pulse
Program Inhibit
VIH
Standby
VIH
Electronic Signature
VIL
1. X = VIH or VIL, VID = 12V ± 0.5V.
VIL
VIH
VPP
VPP
X
VIL
X Data Out
X Hi-Z
X Data In
X Hi-Z
X Hi-Z
VID Codes
Table 4. Electronic Signature
Identifier
A0 Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0 Hex Data
Manufacturer’s
Code
Device Code
VIL 0 0 1 0 0 0 0 0
20h
VIH 0
0
1
1
1
1
0
1
3Dh
5/22
5 Page 
M27C512
5 DC and AC parameters
DC and AC parameters
This section summarizes the operating and measurement conditions, and the DC and AC
characteristics of the device. The parameters in the DC and AC Characteristic tables that
follow are derived from tests performed under the Measurement Conditions summarized in
the relevant tables. Designers should check that the operating conditions in their circuit
match the measurement conditions when relying on the quoted parameters.
Table 6. AC measurement conditions
High Speed
Input Rise and Fall Times
≤ 10ns
Input Pulse Voltages
0 to 3V
Input and Output Timing Ref. Voltages
1.5V
Standard
≤ 20ns
0.4V to 2.4V
0.8V and 2V
Figure 5. Testing input/output waveform
High Speed
3V
0V
1.5V
Standard
2.4V
0.4V
Figure 6. AC Testing Load Circuit
1.3V
1N914
2.0V
0.8V
AI01822
DEVICE
UNDER
TEST
3.3kΩ
CL
OUT
CL = 30pF for High Speed
CL = 100pF for Standard
CL includes JIG capacitance
AI01823B
11/22
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet M27C512.PDF ] | |
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