HT27LC512
OTP CMOS 64K
8-Bit EPROM
Block Diagram
Features
64K
8-bit organization
Single +3.3V power supply
Programming voltage
V
PP
=12.2V
0.2V
V
CC
=5.8V
0.2V
Low power consumption
Active: 15mA max.
Standby: 1
A typ.
Fast read access time: 120ns
CMOS and TTL compatible I/O
Commercial and industrial temperature range
Fast programming algorithm
Read access time: 120ns
Programming time 75
s typ.
High-reliability CMOS technology
Latch-up immunity to 100mA from -1.0V to
V
CC
+1.0V
Two line control (OE & CE)
Standard product identification code
Package type
28-pin DIP/SOP
32-pin PLCC
Commercial temperature ranges
(0
C to +70
C)
General Description
The HT27LC512 chip family is a low-power,
512K bit, +3.3V electrically one-time pro-
gramm a b le (O TP ) r e a d-o n ly m em ories
(EPROM). Organized into 64K words with 8
bits per word, it features a fast single address
location programming, typically at 75
s per
byte. Any byte can be accessed in less than 120ns
with respect to Spec. This eliminates the need for
WAIT states in high-performance microprocessor
systems. The HT27LC512 has separate Output Enable
(OE) and Chip Enable (CE) controls which
eliminate bus contention issues.
1
6th May '99
Pin Assignment
Pin Description
Pin Name
I/O/C/P
Description
A0~A15
I
Address inputs
DQ0~DQ7
I/O
Data inputs/outputs
CE
C
Chip enable
OE/VPP
C/P
Output enable/program voltage supply
NC
--
No connection
Absolute Maximum Ratings
Operation Temperature Commercial ...................................................................................0
C to +70
C
Storage Temperature ......................................................................................................... 65
C to 125
C
Applied VCC Voltage with Respect to GND....................................................................... 0.6V to 7.0V
Applied Voltage on Input Pin with Respect to GND ......................................................... 0.6V to 7.0V
Applied Voltage on Output Pin with Respect to GND ............................................. 0.6V to V
CC
+0.5V
Applied Voltage on A9 Pin with Respect to GND ............................................................ 0.6V to 13.5V
Applied VPP Voltage with Respect to GND ......................................................................0.6V to 13.5V
Applied READ Voltage (Functionality is guaranteed between these limits) ................... +3V to +3.6V
Note: These are stress ratings only. Stresses exceeding the range specified under "Absolute Maxi-
mum Ratings" may cause substantial damage to the device. Functional operation of this device
at other conditions beyond those listed in the specification is not implied and prolonged
exposure to extreme conditions may affect device reliability.
HT27LC512
2
6th May '99
D.C. Characteristics
Read operation
Symbol
Parameter
Test Conditions
Min. Typ.
Max.
Unit
V
CC
Conditions
V
OH
Output High Level
3.3V I
OH
=0.4mA
2.4
--
--
V
V
OL
Output Low Level
3.3V I
OL
=2.0mA
--
--
0.45
V
V
IH
Input High Level
3.3V
--
2.0
--
V
CC
+0.5
V
V
IL
Input Low Level
3.3V
--
0.3
--
0.8
V
I
LI
Input Leakage Current
3.3V V
IN
=0 to 3.6V
5
--
5
A
I
LO
Output Leakage Current
3.3V V
OUT
=0 to 3.6V
10
--
10
A
I
CC
VCC Active Current
3.3V
CE=V
IL
, f=5MHz,
I
OUT
=0mA
--
--
15
mA
I
SB1
Standby Current (CMOS)
3.3V CE=V
CC
0.3V
--
1.0
10
A
I
SB2
Standby Current (TTL)
3.3V CE=V
IH
--
--
0.6
mA
I
PP
VPP Read/Standby Current 3.3V CE=OE=V
IL
, V
PP
=V
CC
--
--
100
A
Programming operation
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
CC
Conditions
V
OH
Output High Level
5.8V I
OH
=0.4mA
2.4
--
--
V
V
OL
Output Low Level
5.8V I
OL
=2.1mA
--
--
0.45
V
V
IH
Input High Level
5.8V
--
0.7V
CC
--
V
CC
+0.5
V
V
IL
Input Low Level
5.8V
--
0.5
--
0.8
V
I
LI
Input Load Current
5.8V V
IN
=V
IL
, V
IH
--
--
5.0
A
V
H
A9 Product ID Voltage
5.8V
--
11.5
--
12.5
V
I
CC
VCC Supply Current
5.8V
--
--
--
40
mA
I
PP
VPP Supply Current
5.8V CE=V
IL
--
--
10
mA
HT27LC512
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6th May '99
Capacitance
Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit
V
CC
Conditions
C
IN
Input Capacitance
3.3V
V
IN
=0V
--
8
12
pF
C
OUT
Output Capacitance
3.3V
V
OUT
=0V
--
8
12
pF
C
VPP
VPP Capacitance
3.3V
V
PP
=0V
--
18
25
pF
A.C. Characteristics
Read operation
Symbol
Parameter
Test Conditions
120
Unit
V
CC
Conditions
Min.
Max.
t
ACC
Address to Output Delay
3.3V CE=OE=V
IL
--
120
ns
t
CE
Chip Enable to Output Delay
3.3V OE=V
IL
--
120
ns
t
OE
Output Enable to Output Delay
3.3V CE=V
IL
--
45
ns
t
DF
CE or OE High to Output Float,
Whichever Occurred First
3.3V
--
--
40
ns
t
OH
Output Hold from Address, CE or
OE, Whichever Occurred First
3.3V
--
0
--
ns
Programming operation
Ta=+25
C
5
C
Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit
V
CC
Conditions
t
AS
Address Setup Time
5.8V
--
2
--
--
s
t
OES
CE/VPP Setup Time
5.8V
--
2
--
--
s
t
OEH
OE/VPP Hold Time
5.8V
--
2
--
--
s
t
DS
Data Setup Time
5.8V
--
2
--
--
s
t
AH
Address Hold Time
5.8V
--
0
--
--
s
t
DH
Data Hold Time
5.8V
--
2
--
--
s
t
DFP
Output Enable to Output Float
Delay
5.8V
--
0
--
130
ns
t
PW
PGM Program Pulse Width
5.8V
--
30
75
105
s
t
VCS
VCC Setup Time
5.8V
--
2
--
--
s
t
DV
Data Valid From CE
5.8V
--
--
--
150
ns
t
VR
OE/VPP Recovery Time
5.8V
--
2
--
--
s
HT27LC512
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6th May '99
Test waveforms and measurements
Output test load
Product Identification Code
Code
Pins
Hex
Data
A0
A1
DQ7
DQ6
DQ5
DQ4
DQ3
DQ2
DQ1
DQ0
Manufacturer
0
1
0
0
0
1
1
1
0
0
1C
Device Type
1
1
1
0
0
0
0
0
1
1
83
Continuation
0
0
0
1
1
1
1
1
1
1
7F
1
0
0
1
1
1
1
1
1
1
7F
Note: C
L
=100pF including jig capacitance
t
R
, t
F
< 20ns (10% to 90%)
HT27LC512
5
6th May '99
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