HT27C512
OTP CMOS 64K
8-Bit EPROM
Block Diagram
Features
Operating voltage: +5.0V
Programming voltage
V
PP
=12.2V
0.2V
V
CC
=5.8V
0.2V
High-reliability CMOS technology
Latch-up immunity to 100mA from -1.0V to
V
CC
+1.0V
CMOS and TTL compatible I/O
Low power consumption
Active: 30mA max.
Standby: 1
A typ.
64K
8-bit organization
Fast read access time: 70ns, 90ns and 120ns
Fast programming algorithm
Programming time 75
s typ.
Two line control (OE & CE)
Standard product identification code
Package type
28-pin DIP/SOP
32-pin PLCC
Commercial temperature range
(0
C to +70
C)
General Description
The HT27C512 chip family is a low-power,
512K bit, +5V electrically one-time programma-
ble (OTP) read-only memories (EPROM). Or-
ganized into 64K words with 8 bits per word, it
features a fast single address location program-
ming, typically at 75
s per byte. Any byte can
be accessed in less than 70ns/90ns with respect
to Spec. This eliminates the need for WAIT
states in high-performance microprocessor sys-
tems. The HT27C512 has separate Output En-
able (OE) and Chip Enable (CE) controls which
eliminate bus contention issues.
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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
VCC
I
Positve power supply
VSS
I
Negative power supply
HT27C512
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6th May '99
Absolute Maximum Ratings
Operation Temperature Commercial ...................................................................................0
C to +70
C
Storage Temperature ......................................................................................................... 65
C to 125
C
Applied VCC Voltage with Respect to VSS ........................................................................ 0.6V to 7.0V
Applied Voltage on Input Pin with Respect to VSS........................................................... 0.6V to 7.0V
Applied Voltage on Output Pin with Respect to VSS ............................................... 0.6V to V
CC
+0.5V
Applied Voltage on A9 Pin with Respect to VSS.............................................................. 0.6V to 13.5V
Applied VPP Voltage with Respect to VSS .......................................................................0.6V to 13.5V
Applied READ Voltage (Functionality is guaranteed between these limits) ................ +4.5V to +5.5V
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.
D.C. Characteristics
Read operation
Symbol
Parameter
Test Conditions
Min. Typ.
Max.
Unit
V
CC
Conditions
V
OH
Output High Level
5V
I
OH
=0.4mA
2.4
--
--
V
V
OL
Output Low Level
5V
I
OL
=2.1mA
--
--
0.45
V
V
IH
Input High Level
5V
--
2.0
--
V
CC
+0.5
V
V
IL
Input Low Level
5V
--
0.3
--
0.8
V
I
LI
Input Leakage Current
5V
V
IN
=0 to 5.5V
5
--
5
A
I
LO
Output Leakage Current
5V
V
OUT
=0 to 5.5V
10
--
10
A
I
CC
VCC Active Current
5V
CE=V
IL
, f=5MHz,
I
OUT
=0mA
--
--
30
mA
I
SB1
Standby Current (CMOS)
5V
CE=V
CC
0.3V
--
1.0
10
A
I
SB2
Standby Current (TTL)
5V
CE=V
IH
--
--
1.0
mA
I
PP
VPP Read/Standby Current
5V
CE=OE=V
IL
, V
PP
=V
CC
--
--
100
A
HT27C512
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6th May '99
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
Capacitance
Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit
V
CC
Conditions
C
IN
Input Capacitance
5V
V
IN
=0V
--
8
12
pF
C
OUT
Output Capacitance
5V
V
OUT
=0V
--
8
12
pF
C
VPP
VPP Capacitance
5V
V
PP
=0V
--
18
25
pF
A.C. Characteristics
Read operation
Symbol
Parameter
Test Conditions
70
90
Unit
V
CC
Conditions
Min. Max. Min. Max.
t
ACC
Address to Output Delay
5V
CE=OE=V
IL
--
70
--
90
ns
t
CE
Chip Enable to Output Delay
5V
OE=V
IL
--
70
--
90
ns
t
OE
Output Enable to Output Delay
5V
CE=V
IL
--
30
--
35
ns
t
DF
CE or OE High to Output
Float, Whichever
Occurred First
5V
--
--
25
--
25
ns
t
OH
Output Hold from Address,
CE or OE, Whichever
Occurred First
5V
--
0
--
0
--
ns
HT27C512
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6th May '99
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
Test waveforms and measurements
For -70, -90 devices:
Output test load
Note: C
L
=100pF including jig capacitance, except for the
-45 devices, where C
L
=30pF.
t
R
, t
F
< 20ns (10% to 90%)
1.3V
(1N914)
3.3k
Output Pin
C
L
HT27C512
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6th May '99
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