ATMEL AT27C516 User Manual
BDTIC www.BDTIC.com/ATMEL
Features
• Fast Read Access Time – 45 ns
• Low Power CMOS Operation
– 100 µA Max Standby
– 30 mA Max Active at 5 MHz
• JEDEC Standard Packages
– 44-Lead PLCC
– 40-Lead VSOP
• 5V ± 10% Power Supply
• High Reliability CMOS Technology
– 2000V ESD Protection
– 200 mA Latchup Immunity
• Rapid Programming Algorithm µ 50 µs/Word (Typical)
• CMOS and TTL Compatible Inputs and Outputs
• Integrated Product Identification Code
• Industrial Temperature Range
1. Description
The AT27C516 is a low-power, high-performance 524,288-bit one-time programmable
read-only memory (OTP EPROM) organized 32K by 16 bits. It requires only one 5V
power supply in normal read mode operation. Any word can be accessed in less than
45 ns, eliminating the need for speed reducing WAIT states. The by-16 organization
make this part ideal for high-performance 16- and 32-bit microprocessor systems.
512K (32K x 16)
OTP EPROM
AT27C516
In read mode, the AT27C516 typically consumes 15 mA. Standby mode supply current is typically less than 10 µA.
The AT27C516 is available in industry-standard JEDEC-approved one-time programmable (OTP) plastic PLCC and VSOP packages. The device features two-line control
(CE
, OE) to eliminate bus contention in high-speed systems.
With 32K word storage capability, the AT27C516 allows firmware to be stored reliably
and to be accessed by the system without the delays of mass storage media.
Atmel’s AT27C516 have additional features to ensure high quality and efficient production use. The Rapid Programming Algorithm reduces the time required to program
the part and guarantees reliable programming. Programming time is typically only
50 µs/word. The Integrated Product Identification Code electronically identifies the
device and manufacturer. This feature is used by industry standard programming
equipment to select the proper programming algorithms and voltages.
0362E–EPROM–1/08
2. Pin Configurations
Pin Name Function
A0 - A14 Addresses
O0 - O15 Outputs
CE
OE
PGM
NC No Connect
Note: Both GND pins must be connected.
2.1 40-lead VSOP (Type 1) Top View
A10
A11
A12
A13
A14
NC
NC
PGM
VCC
VPP
CE
O15
O14
O13
O12
O11
O10
O9
O8
Chip Enable
Output Enable
Program Strobe
1
A9
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
GND
40
A8
39
A7
38
A6
37
A5
36
A4
35
A3
34
A2
33
A1
32
A0
31
OE
30
O0
29
O1
28
O2
27
O3
26
O4
25
O5
24
O6
23
O7
22
GND
21
2.2 44-lead PLCC Top View
Note: PLCC Package Pins 1 and 23 are Don’t Connect.
2
AT27C516
O12
O11
O10
O9
O8
GND
NC
O7
O6
O5
O4
O13
O14
O15CEVPPNCVCC
65432
7
8
9
10
11
12
13
14
15
16
17
1819202122232425262728
O3O2O1
O0
OE
1
NC
PGMNCNC
4443424140
A0A1A2A3A4
A14
39
38
37
36
35
34
33
32
31
30
29
A13
A12
A11
A10
A9
GND
NC
A8
A7
A6
A5
0362E–EPROM–1/08
3. System Considerations
Switching between active and standby conditions via the Chip Enable pin may produce transient voltage excursions. Unless accommodated by the system design, these transients may
exceed datasheet limits, resulting in device non-conformance. At a minimum, a 0.1 µF high
frequency, low inherent inductance, ceramic capacitor should be utilized for each device. This
capacitor should be connected between the V
to the device as possible. Additionally, to stabilize the supply voltage level on printed circuit
boards with large EPROM arrays, a 4.7 µF bulk electrolytic capacitor should be utilized, again
connected between the V
close as possible to the point where the power supply is connected to the array.
4. Block Diagram
AT27C516
and Ground terminals of the device, as close
CC
and Ground terminals. This capacitor should be positioned as
CC
5. Absolute Maximum Ratings*
Temperature Under Bias................................ -55°C to +125°C
Storage Temperature..................................... -65°C to +150°C
Voltage on Any Pin with
Respect to Ground .........................................-2.0V to +7.0V
Voltage on A9 with
Respect to Ground ......................................-2.0V to +14.0V
VPP Supply Voltage with
Respect to Ground .......................................-2.0V to +14.0V
Note: 1. Minimum voltage is -0.6V DC which may undershoot to -2.0V for pulses of less than 20 ns. Maximum output pin voltage is
V
+ 0.75V DC which may overshoot to +7.0 volts for pulses of less than 20 ns.
CC
(1)
(1)
(1)
*NOTICE: Stresses beyond those listed under “Absolute
Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and
functional operation of the device at these or any
other conditions beyond those indicated in the
operational sections of this specification is not
implied. Exposure to absolute maximum rating
conditions for extended periods may affect
device reliability
0362E–EPROM–1/08
3
6. Operating Modes
Mode/Pin CE OE PGM Ai V
Read V
IL
Output Disable X V
Standby V
Rapid Program
(2)
PGM Verify V
PGM Inhibit V
Product Identification
(4)
IH
V
IL
IL
IH
V
IL
V
IL
IH
XX X X
V
IH
V
IL
XX X VPPHigh Z
V
IL
(1)
X
Ai X D
X X X High Z
V
IL
V
IH
X
Ai V
Ai V
A9 = V
(3)
H
A0 = VIH or VIL
A1 - A14 = V
IL
Notes: 1. X can be VIL or VIH.
2. Refer to Programming Characteristics.
3. V
= 12.0 ± 0.5V.
H
4. Two identifier bytes may be selected. All Ai inputs are held low (VIL), except A9 which is set to VH and A0 which is toggled
low (VIL) to select the Manufacturer’s Identification byte and high (VIH) to select the Device Code byte.
5. Standby V
current (ISB) is specified with VPP = VCC. VCC > VPP will cause a slight increase in ISB.
CC
7. DC and AC Operating Conditions for Read Operation
AT27C516
-45 -70
V
PP
PP
PP
CC
Outputs
OUT
(5)
High Z
D
IN
D
OUT
Identification Code
Industrial Operating Temperature (Case)
-40°C - 85°C -40°C - 85°C
V
Power Supply 5V ± 10% 5V ± 10%
CC
8. DC and Operating Characteristics for Read Operation
Symbol Parameter Condition Min Max Units
I
LI
I
LO
(2)
I
PP1
I
SB
I
CC
V
IL
V
IH
V
OL
V
OH
Notes: 1. V
2. V
Input Load Current VIN = 0V to V
Output Leakage Current V
(1)
V
Read/Standby Current VPP = V
PP
(1)
V
Standby Current
CC
= 0V to V
OUT
I
(CMOS), CE = V
SB1
(TTL), CE = 2.0 to VCC + 0.5V 1 mA
I
SB2
VCC Active Current f = 5 MHz, I
CC
CC
CC
OUT
0.3V 100 µA
CC ±
= 0 mA, CE = V
IL
Input Low Voltage -0.6 0.8 V
Input High Voltage 2.0 VCC + 0.5 V
Output Low Voltage IOL = 2.1 mA 0.4 V
Output High Voltage I
must be applied simultaneously with or before VPP, and removed simultaneously with or after VPP.
CC
may be connected directly to VCC, except during programming. The supply current would then be the sum of ICC and IPP.
PP
= -400 µA 2.4 V
OH
± 1µA
± 5µA
10 µA
30 mA
4
AT27C516
0362E–EPROM–1/08
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