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參數(shù)資料
| 型號： | 708173R |
| 英文描述： | Step-Down Controllers with Synchronous Rectifier for CPU Power |
| 中文描述： | 集成電路8位CMOS處理器 |
| 文件頁數(shù)： | 7/24頁 |
| 文件大?。?/td> | 211K |
| 代理商： | 708173R |
Philips Semiconductors
Product specification
83C751/87C751
80C51 8-bit microcontroller family
2K/64 OTP/ROM, I
2
C, low pin count
1998 May 01
7
NOTES TO DC ELECTRICAL CHARACTERISTICS:
1. Parameters are valid over operating temperature range unless otherwise specified. All voltages are with respect to V
SS
unless otherwise
noted.
2. Under steady state (non-transient) conditions, I
OL
must be externally limited as follows:
Maximum I
OL
per port pin:
10mA
Maximum I
per 8-bit port:
26mA
Maximum total I
OL
for all outputs:
67mA
If I
OL
exceeds the test condition, V
OL
may exceed the related specification. Pins are not guaranteed to sink current greater than the listed
test conditions.
3. Pins of ports 1 and 3 source a transition current when they are being externally driven from 1 to 0. The transition current reaches its
maximum value when V
IN
is approximately 2V.
4. Power-down I
CC
is measured with all output pins disconnected; port 0 = V
CC
; X2, X1 n.c.; RST = V
SS
.
5. Active I
CC
is measured with all output pins disconnected; X1 driven with t
CLCH
, t
CHCL
= 5ns, V
IL
= V
SS
+ 0.5V, V
IH
= V
CC
– 0.5V; X2 n.c.;
RST = port 0 = V
CC
. I
CC
will be slightly higher if a crystal oscillator is used.
6. Idle I
CC
is measured with all output pins disconnected; X1 driven with t
CLCH
, t
CHCL
= 5ns, V
IL
= V
SS
+ 0.5V, V
IH
= V
CC
– 0.5V; X2 n.c.;
port 0 = V
CC
; RST = V
SS
.
(NOTE: This is 85
°
C spec.)
AC ELECTRICAL CHARACTERISTICS
T
amb
= 0
°
C to +70
°
C or –40
°
C to +85
°
C, V
CC
= 5V
±
10% for 87C751, V
CC
= 5V
±
10% for 83C751, V
SS
= 0V
1, 2
12MHz 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
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