83C748 Datasheet, PDF (5/18 Pages) NXP Semiconductors – 80C51 8-bit microcontroller family 2K/64 OTP/ROM, low pin count

Philips Semiconductors
80C51 8-bit microcontroller family
2K/64 OTP/ROM, low pin count
Preliminary specification
83C748/87C748
DC ELECTRICAL CHARACTERISTICS
T_amb = 0°C to +70°C, V_CC = 5V ±10%, V_SS = 0V¹
SYMBOL
PARAMETER
TEST CONDITIONS
LIMITS
MIN
MAX
UNIT
V_IL
V_IH
V_IH1
V_IL1
V_IH2
V_OL
V_OL1
V_OH
Input low voltage
Input high voltage, except X1, RST
Input high voltage, X1, RST
P0.2
Input low voltage
Input high voltage
Output low voltage, ports 1 and 3
Output low voltage, port 0.2
Output high voltage, ports 1 and 3
I_OL = 1.6mA²
I_OL = 3.2mA²
I_OH = –60µA
I_OH = –25µA
I_OH = –10µA
–0.5
0.2V_DD–0.1
V
0.2V_CC+0.9 V_CC+0.5
V
0.7V_CC
V_CC+0.5
V
–0.5
0.3V_CC
V
0.7V_CC
V_CC+0.5
V
0.45
V
0.45
V
2.4
V
0.75V_CC
V
0.9V_CC
V
V_OL2
C
Port 0.0 and 0.1 – Drivers
Output low voltage
Driver, receiver combined:
Capacitance
I_OL = 3mA
(over V_CC range)
0.4
V
10
pF
I_IL
I_TL
I_LI
R_RST
C_IO
I_PD
V_PP
Logical 0 input current, ports 1 and 3
Logical 1 to 0 transition current, ports 1 and 3³
Input leakage current, port 0
Internal pull-down resistor
Pin capacitance
Power-down current⁴
V_PP program voltage (for 87C748 only)
V_IN = 0.45V
V_IN = 2V (0 to 70°C)
0.45 < V_IN < V_CC
–50
µA
–650
µA
±10
µA
25
175
kΩ
Test freq = 1MHz,
T_amb = 25°C
10
pF
V_CC = 2 to V_CC max
50
µA
V_SS = 0V
V_CC = 5V±10%
12.5
13.0
V
T_amb = 21°C to 27°C
I_PP
Program current (for 87C748 only)
V_PP = 13.0V
50
mA
I_CC
Supply current (see Figure 2)
NOTES:
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_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.
1999 Apr 15
5