83C751 Datasheet, PDF (7/24 Pages) NXP Semiconductors – 80C51 8-bit microcontroller family 2K/64 OTP/ROM, I2C, low pin count

Philips Semiconductors
80C51 8-bit microcontroller family
2K/64 OTP/ROM, I²C, low pin count
Product specification
83C751/87C751
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
(NOTE: This is 85°C spec.)
Maximum I_OL 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.
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
12
MHz
3.5
16
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
Fall time
20
20
ns
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.
1998 May 01
7