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PDF AT27C512R Data sheet ( Hoja de datos )
| Número de pieza | AT27C512R | |
| Descripción | 512K (64K x 8) One-time Programmable Read-only Memory | |
| Fabricantes | ATMEL Corporation | |
| Logotipo |  |
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Features
• Fast read access time – 45ns
• Low-power CMOS operation
– 100µA max standby
– 20mA max active at 5MHz
• JEDEC standard packages
– 28-lead PDIP
– 32-lead PLCC
• 5V± 10% supply
• High-reliability CMOS technology
– 2,000V ESD protection
– 200mA latchup immunity
• Rapid programming algorithm – 100µs/byte (typical)
• CMOS- and TTL-compatible inputs and outputs
• Integrated product identification code
• Industrial and automotive temperature ranges
• Green (Pb/halide-free) packaging option
512K (64K x 8)
One-time
Programmable,
Read-only Memory
Atmel AT27C512R
1. Description
The Atmel® AT27C512R is a low-power, high-performance, 524,288-bit, one-time pro-
grammable, read-only memory (OTP EPROM) organized as 64K by 8 bits. It requires only
one 5V power supply in normal read mode operation. Any byte can be accessed in less than
45ns, eliminating the need for speed reducing WAIT states on high-performance micropro-
cessor systems.
The Atmel scaled CMOS technology provides high speed, lower active power consumption,
and significantly faster programming. Power consumption is typically only 8mA in active
mode and less than 10µA in standby mode.
The AT27C512R is available in a choice of industry-standard, JEDEC-approved, one-time
programmable (OTP) PDIP and PLCC packages. All devices feature two-line control (CE,
OE) to give designers the flexibility to prevent bus contention.
With 64K byte storage capability, the AT27C512R allows firmware to be stored reliably and
to be accessed by the system without the delays of mass storage media.
The AT27C512R has additional features to ensure high quality and efficient production use.
The rapid programming algorithm reduces the time required to program the part and guar-
antees reliable programming. Programming time is typically only 100µs/byte. The
integrated product identification code electronically identifies the device and manufacturer.
This feature is used by industry standard programming equipment to select the proper pro-
gramming algorithms and voltages.
0015P–EPROM–10/11
1 page  
Figure 5-1. AC waveforms for read operation(1)
Atmel AT27C512R
Notes:
1. Timing measurement reference level is 1.5V for -45 devices. Input AC drive levels are VIL = 0.0V and VIH = 3.0V. Timing
measurement reference levels for all other speed grades are VOL = 0.8V and VOH = 2.0V. Input AC drive levels are
VIL = 0.45V and VIH = 2.4V.
2. OE/VPP may be delayed up to tCE - tOE after the falling edge of CE without impact on tCE.
3. OE/VPP may be delayed up to tACC - tOE after the address is valid without impact on tACC.
4. This parameter is only sampled, and is not 100% tested.
5. Output float is defined as the point when data is no longer driven.
Figure 5-2. Input test waveforms and measurement levels
For -45 devices only:
tR, tF < 5ns (10% to 90%)
For -70 devices:
tR, tF < 20ns (10% to 90%)
Figure 5-3. Output test load
0015P–EPROM–10/11
5
5 Page 
28P6 – PDIP
D
PIN
1
E1
Atmel AT27C512R
A
SEATING PLANE
L
e
C
B1
E
eB
A1
B
0º ~ 15º REF
Notes: 1. This package conforms to JEDEC reference MS-011, variation AB
2. Dimensions D and E1 do not include mold flash or protrusion
mold flash or protrusion shall not exceed 0.25mm (0.010")
COMMON DIMENSIONS
(Unit of Measure = mm)
SYMBOL
A
A1
D
E
E1
B
B1
L
C
eB
e
MIN NOM MAX
– – 4.826
0.381
–
–
36.703 – 37.338
15.240 – 15.875
13.462 – 13.970
0.356 – 0.559
1.041 – 1.651
3.048 – 3.556
0.203 – 0.381
15.494 – 17.526
2.540 TYP
NOTE
Note 2
Note 2
Package drawing contact:
TITLE
28P6, 28-lead (0.600"/15.24mm wide) plastic dual
inline package (PDIP)
09/28/01
DRAWING NO. REV.
28P6
B
0015P–EPROM–10/11
11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet AT27C512R.PDF ] | |
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