s87c751-5a28 NXP Semiconductors, s87c751-5a28 Datasheet - Page 7

• Manufacturer Part Number: s87c751-5a28
• Description: 80c51 8-bit Microcontroller Family 2k/64 Otp/rom, I2c, Low Pin Count
• Manufacturer: NXP Semiconductors

1. Parameters are valid over operating temperature range unless otherwise specified. All voltages are with respect to V
2. Under steady state (non-transient) conditions, I
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
4. Power-down I
5. Active I
6. Idle I
1. Parameters are valid over operating temperature range unless otherwise specified. All voltages are with respect to V
2. Load capacitance for ports = 80pF.
Philips Semiconductors
NOTES TO DC ELECTRICAL CHARACTERISTICS:
AC ELECTRICAL CHARACTERISTICS
T
NOTES:
1998 May 01
amb
1/t
External Clock (Figure 1)
t
t
t
t
CHCX
CLCX
CLCH
CHCL
SYMBOL
80C51 8-bit microcontroller family
2K/64 OTP/ROM, I
noted.
If I
test conditions.
maximum value when V
RST = port 0 = V
port 0 = V
noted.
CLCL
= 0 C to +70 C or –40 C to +85 C, V
OL
CC
exceeds the test condition, V
CC
is measured with all output pins disconnected; X1 driven with t
CC
is measured with all output pins disconnected; X1 driven with t
Oscillator frequency:
High time
Low time
Rise time
Fall time
; RST = V
CC
CC
is measured with all output pins disconnected; port 0 = V
. I
Maximum I
Maximum I
Maximum total I
CC
SS
IN
will be slightly higher if a crystal oscillator is used.
.
is approximately 2V.
OL
OL
2
PARAMETER
C, low pin count
per 8-bit port:
OL
per port pin:
OL
may exceed the related specification. Pins are not guaranteed to sink current greater than the listed
CC
for all outputs:
= 5V 10% for 87C751, V
OL
must be externally limited as follows:
10mA
26mA
67mA
CC
7
CLCH
= 5V 10% for 83C751, V
CLCH
CC
(NOTE: This is 85 C spec.)
, t
; X2, X1 n.c.; RST = V
MIN
CHCL
12MHz CLOCK
20
20
, t
CHCL
= 5ns, V
= 5ns, V
MAX
IL
20
20
= V
IL
= V
SS
SS
SS
SS
+ 0.5V, V
= 0V
.
+ 0.5V, V
VARIABLE CLOCK
MIN
3.5
3.5
1, 2
20
20
83C751/87C751
IH
IH
= V
= V
CC
SS
SS
MAX
CC
– 0.5V; X2 n.c.;
12
16
20
20
unless otherwise
unless otherwise
Product specification
– 0.5V; X2 n.c.;
UNIT
MHz
MHz
ns
ns
ns
ns