– Active Current 30mA at 5MHz
– Standby Current 100µA
■ PROGRAMMING VOLTAGE: 12.75V± 0.25V
■ PROGRAMMING TIME: 100µs/byte (typical)
■ ELECTRONIC SIGNATURE
– Manufacturer Code: 20h
– Device Code: 61h
M27C2001
32
1
FDIP32W (F)PDIP32 (B)
32
1
DESCRIPTION
The M27C2001 is a high speed 2 Mbit EPROM offered in the two ranges UV (ultra violet erase) and
OTP (one time programmable). It is ideally suited
for microprocessor systems requiring large programs and is organised as 262,144 by 8 bits.
The FDIP32W (window ceramic frit-seal package)
and LCCC32W (leadless chip carrier package)
have a transparent lids which allow the user to expose the chipto ultraviolet light to erase thebitpattern. A new pattern can then be written to the
device by following the programming procedure.
For applications wherethe content is programmed
only one time and erasure is not required, the
M27C2001 is offered in PDIP32, PLCC32 and
TSOP32 (8 x 20 mm) packages.
PA16
A17
A14
A13
A8
A9
A11
G
A10
E
Q7
Q6
Q5Q1
Q4
Q3V
Figure 2B. LCC Pin Connections
CC
VPPV
32
Q3
Q4
P
Q5
A7
A6
A5
A4
A3
A2
A1
A0
Q0
9
A12
A15
M27C2001
Q1
Q2
A16
1
17
SS
V
A17
25
Q6
A14
A13
A8
A9
A11
G
A10
E
Q7
AI00718
Figure 2C. TSOP Pin Connections
A11G
A9
A8
A13
A14
A17
V
CC
V
PP
A16
A15
A12
A7
A6
A5
A4A3
1
P
M27C2001
8
(Normal)
9
1617
32
25
24
AI01153B
A10
E
Q7
Q6
Q5
Q4
Q3
V
SS
Q2
Q1
Q0
A0
A1
A2
The operationg modes of the M27C2001 are listed
in the Operating Modes table. A single power supply is required in the read mode. Allinputs are TTL
levels except for VPPand 12V on A9 for Electronic
Signature.
Read Mode
The M27C2001 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
(t
) is equal to the delay from E to output
AVQV
(t
). Data is availableatthe output after a delay
ELQV
of t
from the falling edge of G, assuming that
GLQV
E has been low and the addresses have been stable for at least t
AVQV-tGLQV
.
Standby Mode
The M27C2001 has a standby mode which reduces the supply current from 30mA to 100µA. The
M27C2001 is placed in the standby mode by applying a CMOS high signalto the E input. When in
the standbymode, theoutputsarein a high impedance state, independent of the G input.
2/16
Page 3
M27C2001
Table 2. Absolute Maximum Ratings
(1)
SymbolParameterValueUnit
T
A
T
BIAS
T
STG
(2)
V
IO
V
CC
(2)
V
A9
V
PP
Note: 1. Except for the rating ”Operating Temperature Range”, stressesabove those listedin the Table ”Absolute Maximum Ratings” may
cause permanent damage to the device. These are stress ratings only and operation of the device at these or any other conditions
above thoseindicated in the Operating sections of this specification is not implied. Exposure to Absolute Maximum Rating conditions forextended periods may affect device reliability. Refer alsoto theSTMicroelectronics SUREProgram and otherrelevant quality documents.
2. Minimum DC voltage on Input or Output is –0.5V with possible undershoot to –2.0V for a period less than 20ns. Maximum DC
voltage on Output is V
3. Depends on range.
Ambient Operating Temperature
Temperature Under Bias–50 to 125°C
Storage Temperature–65 to 150°C
Input or Output Voltage (except A9)–2 to 7V
Supply Voltage–2 to 7V
A9 Voltage–2 to 13.5V
Program Supply Voltage–2 to 14V
+0.5V with possible overshoot to VCC+2V for a period less than 20ns.
CC
(3)
–40 to 125°C
Table 3. OperatingModes
ModeEGPA9
Read
Output DisableV
Program
VerifyV
Program Inhibit
Standby
Electronic Signature
Note: X = VIHor VIL,VID= 12V ± 0.5V.
V
IL
IL
V
IL
IL
V
IH
V
IH
V
IL
V
IL
V
IH
V
IH
V
IL
XX
XXV
VILPulse
V
IH
X
XVPPData Out
XXX
XXX
V
IL
V
IH
V
ID
V
PP
V
or V
CC
SS
or V
CC
SS
V
PP
V
PP
V
or V
CC
SS
V
CC
Q0-Q7
Data Out
Hi-Z
Data In
Hi-Z
Hi-Z
Codes
Table 4. Electronic Signature
IdentifierA0Q7Q6Q5Q4Q3Q2Q1Q0Hex Data
Manufacturer’s Code
Device Code
V
IL
V
IH
Two Line Output Control
Because EPROMs are usually used in larger
memory arrays, this product features a 2 line control function which accommodates the use of multiple memory connection. The two line control
function allows:
a. the lowest possible memory power dissipation,
b. complete assurance that output bus contention
will not occur.
00100000 20h
01100001 61h
For the most efficient use of these two control
lines, Eshould be decodedandused as the primary device selecting function, while G should be
made a common connection to all devices in the
array and connected to the READ line from the
system control bus. Thisensures that all deselected memory devices are in their lowpower standby
mode and that the output pins are only active
when data is required from a particular memory
device.
3/16
Page 4
M27C2001
Table 5. AC Measurement Conditions
High SpeedStandard
Input Rise and Fall Times≤ 10ns≤ 20ns
Input Pulse Voltages0 to 3V0.4V to 2.4V
Input and Output Timing Ref. Voltages1.5V0.8V and 2V
Figure 3. AC Testing Input Output Waveform
High Speed
3V
1.5V
0V
Standard
2.4V
0.4V
Table 6. Capacitance
SymbolParameterTest ConditionMinMaxUnit
C
IN
C
OUT
Note: 1. Sampled only, not 100% tested.
Input Capacitance
Output CapacitanceV
(1)
(TA=25°C, f = 1 MHz)
2.0V
0.8V
AI01822
Figure 4. AC Testing Load Circuit
1.3V
1N914
3.3kΩ
DEVICE
UNDER
TEST
C
L
CL= 30pFfor High Speed
CL= 100pF for Standard
CLincludes JIG capacitance
V
=0V
IN
=0V12pF
OUT
6pF
OUT
AI01823B
System Considerations
The power switching characteristics of Advanced
CMOS EPROMs requirecareful decoupling of the
devices. The supply current, ICC, has three segments 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 fallingand rising edges of E. The magnitude of
the 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 output
4/16
control and by properly selected decoupling capacitors. It is recommended that a 0.1µF ceramic
capacitor be used on every device between V
CC
and VSS. This should be a high frequency capacitor of low inherent inductance and should be
placed as close to the device as possible. In addition, a 4.7µF bulk electrolytic capacitor should be
used between VCCand VSSfor every eight devices. The bulk capacitor should be located near the
power supplyconnection point.Thepurposeof the
bulk capacitor is to overcome the voltage drop
caused by the inductive effects of PCB traces.
Page 5
M27C2001
Table 7. Read Mode DC Characteristics
(1)
(TA = 0 to 70 °C or –40 to 85 °C; VCC=5V±5% or 5V ± 10%; VPP=VCC)
SymbolParameterTest ConditionMinMaxUnit
I
I
I
CC
I
CC1
I
CC2
I
V
V
IH
V
Input Leakage Current
LI
Output Leakage Current
LO
Supply Current
I
OUT
0V ≤ V
0V ≤ V
E=V
Supply Current (Standby)TTLE = V
Supply Current (Standby)CMOS
Program Current
PP
Input Low Voltage–0.30.8V
IL
(2)
Input High Voltage2
Output Low Voltage
OL
E>V
I
≤ V
IN
CC
≤ V
OUT
CC
,G=VIL,
IL
= 0mA, f = 5MHz
IH
– 0.2V
CC
V
PP=VCC
= 2.1mA
OL
±10µA
±10µA
30mA
1mA
100µA
10µA
V
+1
CC
0.4V
Output High Voltage TTLIOH= –400µA2.4V
V
OH
Output High Voltage CMOS
Note: 1. VCCmust be applied simultaneously with or before VPPand removed simultaneously or after VPP.
2. Maximum DC voltage on Output is V
Table 8A. Read Mode AC Characteristics
CC
+0.5V.
(1)
I
= –100µAV
OH
CC
– 0.7V
(TA = 0 to 70 °C or –40 to 85 °C; VCC=5V±5% or 5V ± 10%; VPP=VCC)
M27V2001
SymbolAltParameterTest Condition
(3)
-55
Min Max Min Max Min Max Min Max
-70-80-90
V
V
Unit
Address Valid to
(2)
(2)
t
ACC
Output Valid
Chip Enable Low to
t
CE
Output Valid
Output Enable Low
t
OE
to Output Valid
Chip Enable High to
t
DF
Output Hi-Z
Output Enable High
t
DF
to Output Hi-Z
Address Transitionto
t
OH
Output Transition
t
AVQV
t
ELQV
t
GLQV
t
EHQZ
t
GHQZ
t
AXQX
Note: 1. VCCmust be applied simultaneously with or before VPPand removed simultaneously or after VPP.
2. Sampled only, not 100% tested.
3. In case of 45ns speed see High Speed AC measurament conditions.
E=V
G=V
G=V
E=V
,G=V
IL
E=V
E=V
,G=V
IL
IL
IL
IL
IL
IL
IL
55708090ns
55708090ns
30354040ns
030030030030ns
030030030030ns
0000ns
5/16
Page 6
M27C2001
Table 8B. Read Mode AC Characteristics
(1)
(TA = 0 to 70 °C or –40 to 85 °C; VCC=5V±5% or 5V ± 10%; VPP=VCC)
M27V2001
SymbolAltParameterTest Condition
MinMaxMinMaxMinMax
t
AVQV
t
ELQV
t
GLQV
t
EHQZ
t
GHQZ
t
AXQX
Note: 1. VCCmust be applied simultaneously with or before VPPand removed simultaneously or after VPP.
t
(2)
(2)
2. Sampled only, not 100% tested.
Address Valid to Output
ACC
Valid
Chip Enable Low to
t
CE
Output Valid
Output Enable Low to
t
OE
Output Valid
Chip Enable High to
t
DF
Output Hi-Z
Output Enable High to
t
DF
Output Hi-Z
Address Transition to
t
OH
Output Transition
E=V
E=V
,G=V
IL
G=V
E=V
G=V
E=V
,G=V
IL
IL
IL
IL
IL
IL
IL
100120150ns
100120150ns
505060ns
030040050ns
030040050ns
000ns
Figure 5. Read Mode AC Waveforms
Unit-10-12-15/-20/-25
A0-A17
E
G
Q0-Q7
VALID
tAVQV
tGLQV
tELQV
Programming
When delivered (and after each erasure for UV
EPROM), all bits of the M27C2001 are in the ’1’
state. Data is introduced by selectively programming ’0’s into the desired bit locations. Although
only ’0’s will be programmed, both ’1’s and ’0’scan
be present in the data word. The only way to
change a ’0’ to a ’1’ is by die exposition to ultravio-
VALID
tAXQX
tEHQZ
tGHQZ
Hi-Z
AI00719B
let light (UV EPROM). The M27C2001 is in the
programming mode when VPPinput is at 12.75V,
EisatVILand P is pulsed to VIL. The data to be
programmed is applied to 8 bits in parallel to the
data output pins. The levels required for the address and data inputs are TTL. VCCis specified to
be 6.25V ±0.25V.
Note: 1. VCCmust be applied simultaneously with or before VPPand removed simultaneously or after VPP.
2. Sampled only, not 100% tested.
t
t
t
VPS
t
VCS
t
CES
t
t
t
OES
t
t
DFP
t
Address Valid to Program Low2µs
AS
Input Valid to Program Low2µs
DS
VPPHigh to Program Low
VCCHigh to Program Low
2µs
2µs
Chip Enable Low to Program Low2µs
Program Pulse Width95105µs
PW
Program High to Input Transition2µs
DH
Input Transition to Output EnableLow2µs
Output Enable Low to Output Valid100ns
OE
Output Enable High to Output Hi-Z0130ns
Output Enable High to Address
AH
Transition
0ns
V
7/16
Page 8
M27C2001
Figure 6. Programming and Verify Modes AC Waveforms
A0-A17
tAVPL
Q0-Q7
tQVPL
V
PP
tVPHPL
V
CC
tVCHPL
E
tELPL
P
tPLPH
G
Figure 7. Programming Flowchart
VCC= 6.25V,VPP= 12.75V
n=0
P = 100µs Pulse
NO
NO
VERIFY
YES
Last
NO
Addr
YES
CHECK ALL BYTES
1st: VCC=6V
2nd: VCC= 4.2V
++ Addr
YES
++n
=25
FAIL
VALID
DATA INDATA OUT
tPHQX
tGLQV
tQXGL
PROGRAMVERIFY
PRESTO II Programming Algorithm
PRESTO II Programming Algorithm allows the
whole array to be programmed with a guaranteed
margin, in a typical time of 26.5 seconds. Programming with PRESTO II consists of applying a
sequence of 100µs program pulses to each byte
until a correct verify occurs (see Figure 7). During
programming and verify operation, a MARGIN
MODE circuit is automatically activated in order to
guarantee that each cell is programmed with
enough margin. No overprogram pulse is applied
since the verify in MARGIN MODE provides the
necessary margin to each programmed cell.
Program Inhibit
Programming of multiple M27C2001s in parallel
with different data is also easily accomplished. Except for E, all like inputs including G of the parallel
M27C2001 may be common. A TTL low level
pulse applied to a M27C2001’s P input, with E low
and VPPat 12.75V, will program that M27C2001.
A high level E input inhibits the other M27C2001s
from being programmed.
Program Verify
A verify (read) should be performed on the programmed bits to determine that they were correct-
AI00715C
ly programmed. The verify is accomplished with E
and G at VIL, P at VIH,VPPat 12.75V and VCCat
6.25V.
tGHQZ
tGHAX
AI00720
8/16
Page 9
M27C2001
On-Board Programming
The M27C2001 can be directlyprogrammedinthe
application circuit. See the relevant Application
Note AN620.
Electronic Signature
The Electronic Signature (ES) mode allows the
reading out of a binary code froman EPROM that
will identify its manufacturer and type. This mode
is intended for use by programming equipment to
automatically match the device to be programmed
with its corresponding programming algorithm.
The ES mode is functional in the 25°C ± 5°C ambient temperaturerange that is required when programming the M27C2001. To activate the ES
mode, the programming equipment must force
11.5V to 12.5V on address line A9 of the
M27C2001 with VPP=VCC=5V. Two identifier
bytes maythen be sequenced fromthedeviceoutputs bytogglingaddress lineA0from VILtoVIH. All
other address lines must be held at VILduring
Electronic Signature mode. Byte 0 (A0=VIL) represents the manufacturer code and byte 1 (A0=VIH)
the device identifier code. For the STMicroelectronics M27C2001, these two identifier bytes are
given in Table 4 and can be read-out on outputs
Q0 to Q7.
ERASURE OPERATION (applies to UV EPROM)
The erasure characteristics of the M27C2001 are
such that erasure begins when the cells are exposed to light with wavelengths shorter than approximately 4000 Å. It should be noted that
sunlight and some type of fluorescent lamps have
wavelengths in the 3000-4000 Å range. Data
shows that constant exposure to room level fluorescent lighting could erase atypical M27C2001 in
about 3 years, while it would take approximately 1
week to cause erasure when exposed to direct
sunlight. If the M27C2001 is to be exposed to
these types of lighting conditions for extended periods of time, it is suggested that opaque labels be
put over the M27C2001 window to prevent unintentional erasure. The recommended erasure procedure for the M27C2001 is exposure to short
wave ultraviolet light which has wavelength of
2537 Å. The integrated dose (i.e. UV intensity x
exposure time) for erasure should be a minimum
of 15 W-sec/cm2. The erasure time with this dosage is approximately 15 to 20 minutes using an ultraviolet lamp with 12000 µW/cm2power rating.
The M27C2001 should be placed within 2.5 cm (1
inch) of the lamp tubes during the erasure. Some
lamps have a filter on their tubes which should be
removed before erasure.
9/16
Page 10
M27C2001
Table 11. Ordering Information Scheme
Example:M27C2001-55 XC1X
Device Type
M27
SupplyVoltage
C=5V
Device Function
2001 = 2Mb, 256Kb x8
Speed
(1)
=55ns
-55
-70 = 70 ns
-80 = 80 ns
-90 = 90 ns
-10 = 100 ns
Not for New Design
-12 = 120 ns
-15 = 150 ns
-20 = 200 ns
-25 = 250 ns
Tolerance
V
CC
X=±5%
blank = ± 10%
Package
F = FDIP32W
B = PDIP32
L = LCCC32W
C = PLCC32
N = TSOP32: 8 x 20mm
Temperature Range
1=0to70°C
6=–40to85°C
Options
X = Additional Burn-in
TR = Tape& Reel Packing
Note: 1. High Speed, see AC Characteristics section forfurther information.
For a list of available options (Speed, Package, etc...)or for further information on any aspect of this device, please contact the ST Sales Office nearest to you.
10/16
Page 11
M27C2001
Table 12. FDIP32W - 32 pin Ceramic Frit-seal DIP, with window, Package Mechanical Data
Figure 12. TSOP32 - 32 lead Plastic Thin Small Outline, 8 x 20mm, Package Outline
A2
1N
e
E
B
N/2
D1
D
DIE
A
CP
C
TSOP-a
Drawing is not to scale.
LA1α
15/16
Page 16
M27C2001
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences
of use of such information nor forany infringement ofpatents orother rights ofthird parties whichmay result from its use. No licenseis granted
by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject
to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not
authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
The ST logo is registered trademark of STMicroelectronics
1999 STMicroelectronics - All RightsReserved
All other names are the property of their respective owners.
Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Mexico - Morocco - The Netherlands -
Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom -U.S.A.
STMicroelectronics GROUP OF COMPANIES
http://www.st.com
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