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參數(shù)資料
| 型號： | 87C748 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 80C51 8-bit microcontroller family 2K/64 OTP/ROM, low pin count |
| 中文描述： | 80C51的8位單片機(jī)系列2K/64檢察官辦公室/光盤，低接腳數(shù) |
| 文件頁數(shù)： | 6/18頁 |
| 文件大小： | 147K |
| 代理商： | 87C748 |
Philips Semiconductors
Preliminary specification
83C748/87C748
80C51 8-bit microcontroller family
2K/64 OTP/ROM, low pin count
1999 Apr 15
6
AC ELECTRICAL CHARACTERISTICS
T
amb
= 0
°
C to +70
°
C, V
CC
= 5V
±
10%, V
SS
= 0V
1, 2
16MHz CLOCK
VARIABLE CLOCK
SYMBOL
PARAMETER
MIN
MAX
MIN
MAX
UNIT
1/t
CLCL
Oscillator frequency:
3.5
3.5
12
16
MHz
MHz
External Clock (Figure 1)
t
CHCX
High time
20
20
ns
t
CLCX
Low time
20
20
ns
t
CLCH
Rise time
20
20
ns
t
CHCL
NOTES:
1. Parameters are valid over operating temperature range unless otherwise specified. All voltages are with respect to V
SS
unless otherwise
noted.
2. Load capacitance for ports = 80pF.
Fall time
20
20
ns
EXPLANATION OF THE AC SYMBOLS
Each timing symbol has five characters. The first character is always
‘t’ (= time). The other characters, depending on their positions,
indicate the name of a signal or the logical status of that signal. The
designations are:
C – Clock
D – Input data
H – Logic level high
L – Logic level low
Q – Output data
T – Time
V – Valid
X – No longer a valid logic level
Z – Float
t
CHCL
t
CLCL
t
CLCH
t
CHCX
V
CC
–0.5
0.45V
0.2 V
CC
+ 0.9
0.2 V
CC
– 0.1
t
CLCX
SU00297
Figure 1. External Clock Drive
ROM CODE SUBMISSION
When submitting ROM code for the 83C748, the following must be specified:
1. 2k byte user ROM data
ADDRESS
CONTENT
BIT(S)
COMMENT
0000H to 07FFH
DATA
7:0
User ROM Data
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| 87C751 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:80C51 8-bit microcontroller family 2K/64 OTP/ROM, I2C, low pin count |
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