参数资料
型号: AT27C512R-45JU
厂商: Atmel
文件页数: 2/13页
文件大小: 0K
描述: IC OTP 512KBIT 45NS 32PLCC
标准包装: 32
格式 - 存储器: EPROMs
存储器类型: EPROM OTP
存储容量: 512K (64K x 8)
速度: 45ns
接口: 并联
电源电压: 4.5 V ~ 5.5 V
工作温度: -40°C ~ 85°C
封装/外壳: 32-LCC(J 形引线)
供应商设备封装: 32-PLCC
包装: 管件
产品目录页面: 1457 (CN2011-ZH PDF)
2.
Pin configurations
Pin name
A0 - A15
Function
Addresses
32-lead PLCC
Top view
28-lead PDIP
Top view
O0 - O7
Outputs
A15
1
28
VCC
CE
OE /V PP
NC
Chip enable
Output enable/ Program supply
No connect
A6
A5
A4
A3
A2
A1
A0
NC
O0
5
6
7
8
9
10
11
12
13
29
28
27
26
25
24
23
22
21
A8
A9
A11
NC
OE/VPP
A1 0
CE
O7
O6
A12
A7
A6
A5
A4
A3
A2
A1
A0
O0
2
3
4
5
6
7
8
9
10
11
27
26
25
24
23
22
21
20
19
18
A14
A13
A8
A9
A1 1
OE/VPP
A1 0
CE
O7
O6
Note:
PLCC package pins 1 and 17
O1
O2
GND
12
13
14
17
16
15
O5
O4
O3
are don’t connect
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 nonconformance.
At a minimum, a 0.1μF, high-frequency, low inherent inductance, ceramic capacitor should be utilized for each device. This
capacitor should be connected between the V CC and ground terminals of the device, as close to the device as possible.
Additionally, to stabilize the supply voltage level on printed circuit boards with large EPROM arrays, a 4.7μF bulk electrolytic
capacitor should be utilized, again connected between the V CC and ground terminals. This capacitor should be positioned as
close as possible to the point where the power supply is connected to the array.
Figure 3-1.
Block diagram
2
Atmel AT27C512R
0015P–EPROM–10/11
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