CAT28F020
2 Megabit CMOS Flash Memory
FEATURES
s
Fast Read Access Time: 70/90/120 ns
s
Low Power CMOS Dissipation:
Licensed Intel
second source
s
Commercial, Industrial and Automotive
Temperature Ranges
s
Stop Timer for Program/Erase
s
On-Chip Address and Data Latches
s
JEDEC Standard Pinouts:
– Active: 30 mA max (CMOS/TTL levels)
– Standby: 1 mA max (TTL levels)
– Standby: 100
µ
A max (CMOS levels)
s
High Speed Programming:
– 10
µ
s per byte
– 4 Seconds Typical Chip Program
– 32-pin DIP
– 32-pin PLCC
– 32-pin TSOP (8 x 20)
s
100,000 Program/Erase Cycles
s
10 Year Data Retention
s
Electronic Signature
s
0.5 Seconds Typical Chip-Erase
s
12.0V
±
5% Programming and Erase Voltage
DESCRIPTION
The CAT28F020 is a high speed 256K x 8-bit electrically
erasable and reprogrammable Flash memory ideally
suited for applications requiring in-system or after-sale
code updates. Electrical erasure of the full memory
contents is achieved typically within 0.5 second.
It is pin and Read timing compatible with standard
EPROM and E
2
PROM devices. Programming and
Erase are performed through an operation and verify
algorithm. The instructions are input via the I/O bus,
using a two write cycle scheme. Address and Data are
latched to free the I/O bus and address bus during the
write operation.
The CAT28F020 is manufactured using Catalyst’s ad-
vanced CMOS floating gate technology. It is designed
to endure 100,000 program/erase cycles and has a data
retention of 10 years. The device is available in JEDEC
approved 32-pin plastic DIP, 32-pin PLCC or 32-pin
TSOP packages.
BLOCK DIAGRAM
I/O0–I/O7
I/O BUFFERS
ERASE VOLTAGE
SWITCH
WE
COMMAND
REGISTER
PROGRAM VOLTAGE
SWITCH
CE, OE LOGIC
DATA
LATCH
SENSE
AMP
CE
OE
ADDRESS LATCH
Y-GATING
Y-DECODER
2,097,152 BIT
MEMORY
ARRAY
5115 FHD F02
A0–A17
X-DECODER
VOLTAGE VERIFY
SWITCH
© 1998 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
Doc. No. 25037-00 2/98 F-1
CAT28F020
PIN CONFIGURATION
DIP Package (P)
VPP
A16
A15
A12
A7
A6
A5
A4
A3
A2
A1
A0
I/O0
I/O1
I/O2
VSS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
VCC
WE
A17
A14
A13
A8
A9
A11
OE
A10
CE
I/O7
I/O6
I/O5
I/O4
I/O3
PIN FUNCTIONS
PLCC Package (N)
A12
A15
A16
VPP
VCC
WE
A17
Pin Name
A
0
–A
17
I/O
0
–I/O
7
CE
OE
WE
V
CC
V
SS
V
PP
Type
Input
I/O
Input
Input
Input
Function
Address Inputs for
memory addressing
Data Input/Output
Chip Enable
Output Enable
Write Enable
Voltage Supply
Ground
Program/Erase
Voltage Supply
4 3 2 1 32 31 30
A7
A6
A5
A4
A3
A2
A1
A0
I/O0
5
6
29
28
A14
A13
A8
A9
A11
OE
A10
CE
I/O7
7
27
8
26
9
25
10
24
11
23
12
22
13
21
14 15 16 17 18 19 20
I/O1
I/O2
VSS
I/O3
I/O4
I/O5
I/O6
5115 FHD F01
TSOP Package (Standard Pinout) (T)
A11
A9
A8
A13
A14
A17
WE
VCC
VPP
A16
A15
A12
A7
A6
A5
A4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
OE
A10
CE
I/O7
I/O6
I/O5
I/O4
I/O3
VSS
I/O2
I/O1
I/O0
A0
A1
A2
A3
TSOP Package (Reverse Pinout) (TR)
OE
A10
CE
I/O7
I/O6
I/O5
I/O4
I/O3
VSS
I/O2
I/O1
I/O0
A0
A1
A2
A3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
A11
A9
A8
A13
A14
A17
WE
VCC
VPP
A16
A15
A12
A7
A6
A5
A4
5115 FHD F14
Doc. No. 25037-00 2/98 F-1
2
CAT28F020
ABSOLUTE MAXIMUM RATINGS*
Temperature Under Bias ................... –55°C to +95°C
Storage Temperature ....................... –65°C to +150°C
Voltage on Any Pin with
Respect to Ground
(1)
........... –2.0V to +V
CC
+ 2.0V
Voltage on Pin A
9
with
Respect to Ground
(1)
................... –2.0V to +13.5V
V
PP
with Respect to Ground
during Program/Erase
(1)
.............. –2.0V to +14.0V
V
CC
with Respect to Ground
(1)
............ –2.0V to +7.0V
Package Power Dissipation
Capability (T
A
= 25°C) .................................. 1.0 W
Lead Soldering Temperature (10 secs) ............ 300°C
Output Short Circuit Current
(2)
........................ 100 mA
*COMMENT
Stresses above those listed under “Absolute Maximum
Ratings” may cause permanent damage to the device.
These are stress ratings only, and functional operation of
the device at these or any other conditions outside of those
listed in the operational sections of this specification is not
implied. Exposure to any absolute maximum rating for
extended periods may affect device performance and
reliability.
RELIABILITY CHARACTERISTICS
Symbol
N
END(3)
T
DR(3)
V
ZAP(3)
I
LTH(3)(4)
Parameter
Endurance
Data Retention
ESD Susceptibility
Latch-Up
Min.
100K
10
2000
100
Max.
Units
Cycles/Byte
Years
Volts
mA
Test Method
MIL-STD-883, Test Method 1033
MIL-STD-883, Test Method 1008
MIL-STD-883, Test Method 3015
JEDEC Standard 17
CAPACITANCE
T
A
= 25°C, f = 1.0 MHz
Limits
Symbol
C
IN(3)
C
OUT(3)
C
VPP(3)
Test
Input Pin Capacitance
Output Pin Capacitance
V
PP
Supply Capacitance
Min
Max.
6
10
25
Units
pF
pF
pF
Conditions
V
IN
= 0V
V
OUT
= 0V
V
PP
= 0V
Note:
(1) The minimum DC input voltage is –0.5V. During transitions, inputs may undershoot to –2.0V for periods of less than 20 ns. Maximum DC
voltage on output pins is V
CC
+0.5V, which may overshoot to V
CC
+ 2.0V for periods of less than 20ns.
(2) Output shorted for no more than one second. No more than one output shorted at a time.
(3) This parameter is tested initially and after a design or process change that affects the parameter.
(4) Latch-up protection is provided for stresses up to 100 mA on address and data pins from –1V to V
CC
+1V.
3
Doc. No. 25037-00 2/98 F-1
CAT28F020
D.C. OPERATING CHARACTERISTICS
V
CC
= +5V
±10%,
unless otherwise specified.
Limits
Symbol
I
LI
I
LO
I
SB1
I
SB2
I
CC1
I
CC2(1)
I
CC3(1)
I
CC4(1)
I
PPS
I
PP1
I
PP2(1)
I
PP3(1)
I
PP4(1)
V
IL
V
ILC
V
OL
V
IH
V
IHC
V
OH1
V
OH2
V
ID
I
ID(1)
V
LO
Parameter
Input Leakage Current
Output Leakage Current
V
CC
Standby Current CMOS
V
CC
Standby Current TTL
V
CC
Active Read Current
V
CC
Programming Current
V
CC
Erase Current
V
CC
Prog./Erase Verify Current
V
PP
Standby Current
V
PP
Read Current
V
PP
Programming Current
V
PP
Erase Current
V
PP
Prog./Erase Verify Current
Input Low Level TTL
Input Low Level CMOS
Output Low Level
Input High Level TTL
Input High Level CMOS
Output High Level TTL
Output High Level CMOS
A
9
Signature Voltage
A
9
Signature Current
V
CC
Erase/Prog. Lockout Voltage
2.5
2
V
CC
*0.7
2.4
V
CC
–0.4
11.4
13
200
–0.5
–0.5
Min.
Max.
±1
±1
100
1
30
15
15
15
±10
200
30
30
5
0.8
0.8
0.45
V
CC
+0.5
V
CC
+0.5
Unit
µA
µA
µA
mA
mA
mA
mA
mA
µA
µA
mA
mA
mA
V
V
V
V
V
V
V
V
µA
V
I
OH
= –2.5mA, V
CC
= 4.5V
I
OH
= –400µA, V
CC
= 4.5V
A
9
= V
ID
A
9
= V
ID
I
OL
= 5.8mA, V
CC
= 4.5V
Test Conditions
V
IN
= V
CC
or V
SS
V
CC
= 5.5V, OE = V
IH
V
OUT
= V
CC
or V
SS
,
V
CC
= 5.5V, OE = V
IH
CE = V
CC
±0.5V,
V
CC
= 5.5V
CE = V
IH
, V
CC
= 5.5V
V
CC
= 5.5V, CE = V
IL
,
I
OUT
= 0mA, f = 6 MHz
V
CC
= 5.5V,
Programming in Progress
V
CC
= 5.5V,
Erasure in Progress
V
CC
= 5.5V, Program or
Erase Verify in Progress
V
PP
= V
PPL
V
PP
= V
PPH
V
PP
= V
PPH
,
Programming in Progress
V
PP
= V
PPH
,
Erasure in Progress
V
PP
= V
PPH
, Program or
Erase Verify in Progress
Note:
(1) This parameter is tested initially and after a design or process change that affects the parameter.
Doc. No. 25037-00 2/98 F-1
4
CAT28F020
SUPPLY CHARACTERISTICS
Limits
Symbol
V
CC
V
PPL
V
PPH
Parameter
V
CC
Supply Voltage
V
PP
During Read Operations
V
PP
During Read/Erase/Program
Min
4.5
0
11.4
Max.
5.5
6.5
12.6
Unit
V
V
V
A.C. CHARACTERISTICS, Read Operation
V
CC
= +5V
±10%,
unless otherwise specified.
JEDEC
Symbol
t
AVAV
t
ELQV
t
AVQV
t
GLQV
t
AXQX
t
GLQX
t
ELQX
t
GHQZ
t
EHQZ
t
WHGL(1)
Standard
Symbol
t
RC
t
CE
t
ACC
t
OE
t
OH
t
OLZ(1)(6)
t
LZ(1)(6)
t
DF(1)(2)
t
DF(1)(2)
-
Parameter
Read Cycle Time
CE
Access Time
Address Access Time
OE
Access Time
Output Hold from Address
OE/CE
Change
OE
to Output in Low-Z
CE
to Output in Low-Z
OE
High to Output High-Z
CE
High to Output High-Z
Write Recovery Time Before Read
6
0
0
0
20
30
6
28F020-70
(8)
Min.
70
70
70
28
0
0
0
30
40
6
Max.
28F020-90
(7)
28F020-12
(7)
Min.
90
90
90
35
0
0
0
30
40
Max.
Min.
120
120
120
50
Max.
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
µ
s
Figure 1. A.C. Testing Input/Output Waveform
(3)(4)(5)
Figure 2. Highspeed A.C. Testing Input/Output
Waveform
(3)(4)(5)
2.4 V
INPUT PULSE LEVELS
0.45 V
0.8 V
2.0 V
REFERENCE POINTS
0.0 V
3.0 V
INPUT PULSE LEVELS
1.5 V
REFERENCE POINTS
Testing Load Circuit (example)
1.3V
1N914
Testing Load Circuit (example)
1.3V
1N914
3.3K
DEVICE
UNDER
TEST
OUT
CL = 100 pF
CL INCLUDES JIG CAPACITANCE
3.3K
DEVICE
UNDER
TEST
OUT
CL = 30 pF
CL INCLUDES JIG CAPACITANCE
Note:
(1) This parameter is tested initially and after a design or process change that affects the parameter.
(2) Output floating (High-Z) is defined as the state where the external data line is no longer driven by the output buffer.
(3) Input Rise and Fall Times (10% to 90%) < 10 ns.
(4) Input Pulse Levels = 0.45V and 2.4V. For High Speed Input Pulse Levels 0.0V and 3.0V.
(5) Input and Output Timing Reference = 0.8V and 2.0V. For High Speed Input and Output Timing Reference = 1.5V.
(6) Low-Z is defined as the state where the external data may be driven by the output buffer but may not be valid.
(7) For load and reference points, see Fig. 1
(8) For load and reference points, see Fig. 2
5
Doc. No. 25037-00 2/98 F-1
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