27C128
128K (16K x 8) CMOS EPROM
FEATURES
• High speed performance
- 120 ns access time available
• CMOS Technology for low power consumption
- 20 mA Active current
- 100
µ
A Standby current
• Factory programming available
• Auto-insertion-compatible plastic packages
• Auto ID aids automated programming
• Separate chip enable and output enable controls
• High speed “express” programming algorithm
• Organized 16K x 8: JEDEC standard pinouts
- 28-pin Dual-in-line package
- 32-pin PLCC Package
- 28-pin SOIC package
- Tape and reel
• Available for the following temperature ranges:
- Commercial:
0˚C to +70˚C
- Industrial:
-40˚C to +85˚C
- Automotive:
-40˚C to +125˚C
PACKAGE TYPES
DIP/SOIC
V
PP
A12
A7
A6
A5
A4
A3
A2
A1
A0
O0
O1
O2
V
SS
• 1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
CC
PGM
A13
A8
A9
A11
OE
A10
CE
O7
O6
O5
O4
O3
27C128
PLCC
32
31
30
4
3
2
1
A7
A12
V
PP
NU
Vcc
PGM
A13
DESCRIPTION
The Microchip Technology Inc. 27C128 is a CMOS
128K bit (electrically) Programmable Read Only Mem-
ory. The device is organized as 16K words by 8 bits
(16K bytes). Accessing individual bytes from an
address transition or from power-up (chip enable pin
going low) is accomplished in less than 120 ns. CMOS
design and processing enables this part to be used in
systems where reduced power consumption and high
reliability are requirements.A complete family of pack-
ages is offered to provide the most flexibility in applica-
tions. For surface mount applications, PLCC, SOIC, or
TSOP packaging is available. Tape and reel packaging
is also available for PLCC or SOIC packages. UV eras-
able versions are also available.
A complete family of packages is offered to provide the
most flexibility in applications. For surface mount appli-
cations, PLCC or SOIC packaging is available. Tape
and reel packaging is also available for PLCC or SOIC
packages.
A6
A5
A4
A3
A2
A1
A0
NC
O0
5
6
29
28
7
8
9
10
11
12
13
14
15
16
27
26
25
24
23
22
21
A8
A9
A11
NC
OE
A10
CE
O7
O6
17
18
19
©
1996 Microchip Technology Inc.
O1
O2
V
SS
NU
O3
O4
O5
20
27C128
DS11003K-page 1
This document was created with FrameMaker 4 0 4
27C128
1.0
1.1
ELECTRICAL CHARACTERISTICS
Maximum Ratings*
TABLE 1-1:
Name
A0-A13
CE
OE
PGM
V
PP
O0 - O7
V
CC
V
SS
NC
NU
PIN FUNCTION TABLE
Function
Address Inputs
Chip Enable
Output Enable
Program Enable
Programming Voltage
Data Output
+5V Power Supply
Ground
No Connection; No Internal Connec-
tions
Not Used; No External Connection Is
Allowed
V
CC
and input voltages w.r.t. V
SS
........ -0.6V to +7.25V
V
PP
voltage w.r.t. V
SS
during
programming .......................................... -0.6V to +14V
Voltage on A9 w.r.t. V
SS
...................... -0.6V to +13.5V
Output voltage w.r.t. V
SS
............... -0.6V to V
CC
+1.0V
Storage temperature .......................... -65˚C to +150˚C
Ambient temp. with power applied ..... -65˚C to +125˚C
*Notice: Stresses above those listed under “Maximum Ratings”
may cause permanent damage to the device. This is a stress rat-
ing only and functional operation of the device at those or any
other conditions above those indicated in the operation listings of
this specification is not implied. Exposure to maximum rating con-
ditions for extended periods may affect device reliability.
TABLE 1-2:
READ OPERATION DC CHARACTERISTICS
V
CC
= +5V (
±
10%)
Commercial:
Industrial:
Extended (Automotive):
Tamb = 0˚C to +70˚C
Tamb = -40˚C to +85˚C
Tamb = -40
°
C to +125
°
C
Conditions
Parameter
Input Voltages
Input Leakage
Output Voltages
Output Leakage
Input Capacitance
Output Capacitance
Power Supply Current,
Active
Part*
all
all
all
all
all
all
C
I,E
Status
Logic "1"
Logic "0"
—
Logic "1"
Logic "0"
—
—
—
TTL input
TTL input
Symbol
V
IH
V
IL
I
LI
V
OH
V
OL
I
LO
C
IN
C
OUT
I
CC1
I
CC2
Min.
2.0
-0.5
-10
2.4
Max.
V
CC
+1
0.8
10
0.45
Units
V
V
µ
A
V
V
µ
A
pF
pF
mA
mA
V
IN
= 0 to V
CC
I
OH
= -400
µ
A
I
OL
= 2.1 mA
V
OUT
= 0V to V
CC
V
IN
= 0V; Tamb = 25
°
C;
f = 1 MHz
V
OUT
= 0V; Tamb = 25
°
C;
f = 1 MHz
V
CC
= 5.5V; V
PP
= V
CC
f = 1 MHz;
OE = CE = V
IL
;
I
OUT
= 0 mA;
V
IL
= -0.1 to 0.8V;
V
IH
= 2.0 to V
CC
;
Note 1
-10
—
—
—
—
10
6
12
20
25
Power Supply Current,
Standby
I
PP
Read Current
V
PP
Read Voltage
C
I, E
all
all
all
TTL input
TTL input
CMOS input
Read Mode
Read Mode
I
CC
(
S
)
—
—
—
V
CC
-0.7
2
3
100
100
V
CC
mA
mA
µ
A
µ
A
V
CE = V
CC
±
0.2V
V
PP
= 5.5V
I
PP
V
PP
* Parts: C=Commercial Temperature Range; I, E=Industrial and Extended Temperature Ranges
Note 1: Typical active current increases .75 mA per MHz up to operating frequency for all temperature ranges.
DS11003K-page 2
©
1996 Microchip Technology Inc.
27C128
TABLE 1-3:
READ OPERATION AC CHARACTERISTICS
AC Testing Waveform:
Output Load:
Input Rise and Fall Times:
Ambient Temperature:
V
IH
= 2.4V and V
IL
= 0.45V; V
OH
= 2.0V V
OL
= 0.8V
1 TTL Load + 100 pF
10 ns
Commercial:
Tamb = 0˚C to +70˚C
Industrial:
Tamb = -40˚C to +85˚C
Extended (Automotive): Tamb = -40
°
C to +125
°
C
Units Conditions
Min Max Min Max Min Max
Address to Output Delay
CE to Output Delay
OE to Output Delay
CE or OE to O/P High
Impedance
Output Hold from
Address CE or OE,
whichever occurs first
t
ACC
t
CE
t
OE
t
OFF
t
OH
—
—
—
0
0
120
120
65
50
—
—
—
—
0
0
150
150
70
50
—
—
—
—
0
0
170
170
70
50
—
Min Max Min Max
—
—
—
0
0
200
200
75
55
—
—
—
—
0
0
250
250
100
60
—
ns
ns
ns
ns
ns
CE=OE=V
IL
OE=V
IL
CE=V
IL
27C128-12 27C128-15 27C128-17 27C128-20 27C128-25
Parameter
Sym
FIGURE 1-1:
V
IH
Address
V
IL
V
IH
CE
V
IL
READ WAVEFORMS
Address Valid
t
CE(2)
V
IH
OE
V
IL
V
OH
V
OL
t
ACC
t
OE(2)
High Z
t
OFF(1,3)
t
OH
Valid Output
High Z
Outputs
O0 - O7
Notes: (1) t
OFF
is specified for OE or CE, whichever occurs first
(2) OE may be delayed up to t
CE
- t
OE
after the falling edge of CE without impact on t
CE
(3) This parameter is sampled and is not 100% tested.
©
1996 Microchip Technology Inc.
DS11003K-page 3
27C128
TABLE 1-4:
PROGRAMMING DC CHARACTERISTICS
Ambient Temperature: Tamb = 25
°
C
±
5
°
C
V
CC
= 6.5V
±
0.25V, V
PP
= 13.0V
±
0.25V
Parameter
Input Voltages
Input Leakage
Output Voltages
V
CC
Current, program & verify
V
PP
Current, program
A9 Product Identification
Status
Logic”1”
Logic”0”
—
Logic”1”
Logic”0”
—
—
—
Symbol
V
IH
V
IL
I
LI
V
OH
V
OL
I
CC2
I
PP2
V
H
Min
2.0
-0.1
-10
2.4
0.45
—
—
11.5
20
25
12.5
Max.
V
CC
+1
0.8
10
Units
V
V
µ
A
V
V
mA
mA
V
V
IN
= 0V to V
CC
I
OH
= -400
µ
A
I
OL
= 2.1 mA
Note 1
Note 1
Conditions
Note 1: V
CC
must be applied simultaneously or before V
PP
and removed simultaneously or after V
PP
TABLE 1-5:
PROGRAMMING AC CHARACTERISTICS
AC Testing Waveform: V
IH
=2.4V and V
IL
=0.45V; V
OH
=2.0V; V
OL
=0.8V
Ambient Temperature: Tamb=25°C± 5°C
V
CC
= 6.5V
±
0.25V, V
PP
= V
H
= 13.0V
±
0.25V
Symbol
t
AS
t
DS
t
DH
t
AH
t
DF
t
VCS
t
PW
t
CES
t
OES
t
VPS
t
OE
Min
2
2
2
0
0
2
95
2
2
2
—
Max
—
—
—
—
130
—
105
—
—
—
100
Units
µs
µs
µs
µs
ns
µs
µs
µs
µs
µs
ns
100
µs
typical
Remarks
for Program, Program Verify
and Program Inhibit Modes
Parameter
Address Set-Up Time
Data Set-Up Time
Data Hold Time
Address Hold Time
Float Delay (2)
V
CC
Set-Up Time
Program Pulse Width (1)
CE Set-Up Time
OE Set-Up Time
V
PP
Set-Up Time
Data Valid from OE
Note 1: For express algorithm, initial programming width tolerance is 100
µs ±5%.
2: This parameter is only sampled and not 100% tested. Output float is defined as the point where data is no
longer driven (see timing diagram).
DS11003K-page 4
©
1996 Microchip Technology Inc.
27C128
FIGURE 1-2:
PROGRAMMING WAVEFORMS (1)
Program
V
IH
Address
V
IL
t
AS
V
IH
Data
V
IL
t
DS
13.0 V (3)
V
PP
5.0 V
6.5 V (3)
V
CC
5.0 V
V
IH
CE
V
IL
t
CES
V
IH
PGM
V
IL
t
PW
V
IH
OE
V
IL
Notes: (1) The input timing reference is 0.8V for V
IL
and 2.0V for V
IH
.
(2) t
DF
and t
OE
are characteristics of the device but must be accommodated by the programmer.
(3) Vcc = 6.5V
±0.25V,
V
PP
= V
H
= 13.0V
±0.25V
for Express algorithm.
t
OPW
t
OES
t
OE
(2)
t
VCS
t
VPS
Data In Stable
t
DH
High Z
Data Out Valid
t
DF
(2)
t
AH
Address Stable
Verify
TABLE 1-6:
MODES
CE
V
IL
V
IL
V
IL
V
IH
V
IH
V
IL
V
IL
OE
V
IL
V
IH
V
IL
X
X
V
IH
V
IL
PGM
V
IH
V
IL
V
IH
X
X
V
IH
V
IH
V
PP
V
CC
V
H
V
H
V
H
V
CC
V
CC
V
CC
A9
X
X
X
X
X
X
V
H
O0 - O7
D
OUT
D
IN
D
OUT
High Z
High Z
High Z
Identity Code
Operation Mode
Read
Program
Program Verify
Program Inhibit
Standby
Output Disable
Identity
X = Don’t Care
1.2
Read Mode
(See Timing Diagrams and AC Characteristics)
Read Mode is accessed when
a)
b)
the CE pin is low to power up (enable) the chip
the OE pin is low to gate the data to the output
pins
For Read operations, if the addresses are stable, the
address access time (t
ACC
) is equal to the delay from
CE to output (t
CE
). Data is transferred to the output
after a delay from the falling edge of OE (t
OE
).
©
1996 Microchip Technology Inc.
DS11003K-page 5
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