83C749 Datasheet, PDF (13/22 Pages) NXP Semiconductors – 80C51 8-bit microcontroller family 2K/64 OTP/ROM, 5 channel 8-bit A/D, PWM, low pin count

Philips Semiconductors
80C51 8-bit microcontroller family
2K/64 OTP/ROM, 5 channel 8-bit A/D, PWM, low pin count
Preliminary specification
83C749/87C749
DC ELECTRICAL CHARACTERISTICS (Continued)
T_amb = 0°C to +70°C, AV_CC = 5V ±5, AV_SS = 0V⁴
V_CC = 5V ± 10%, V_SS = 0V
TEST
SYMBOL
PARAMETER
CONDITIONS
LIMITS⁴
MIN
TYP¹
MAX
UNIT
Analog Inputs (A/D guaranteed only with quartz window covered.) (Continued)
R
Resolution
8
bits
E_RA
OS_e
G_e
M_CTC
C_t
Relative accuracy
Zero scale offset
Full scale gain error
Channel to channel matching
Crosstalk
0–100kHz
±1
LSB
±1
LSB
0.4
%
±1
LSB
–60
dB
NOTES:
1. Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only and
functional operation of the device at these or any conditions other than those described in the AC and DC Electrical Characteristics section
of this specification is not implied.
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. This product includes circuitry specifically designed for the protection of its internal devices from the damaging effects of excessive static
charge. Nonetheless, it is suggested that conventional precautions be taken to avoid applying greater than the rated maxima.
4. Parameters are valid over operating temperature range unless otherwise specified. All voltages are with respect to V_SS unless otherwise
noted.
5. Power-down I_CC is measured with all output pins disconnected; port 0 = V_CC; X2, X1 n.c.; RST = V_SS.
6. 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.
7. 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.
8. Load capacitance for ports = 80pF.
9. The resistor ladder network is not disconnected in the power down or idle modes. Thus, to conserve power, the user may remove AV_CC.
10. If the A/D function is not required, or if the A/D function is only needed periodically, AV_CC may be removed without affecting the operation of
the digital circuitry. Contents of ADCON and ADAT are not guaranteed to be valid. If AV_CC is removed, the A/D inputs must be lowered to
less than 0.5V. Digital inputs on P1.0–P1.4 will not function normally.
11. These parameters do not apply to P1.0–P1.4 if the A/D function is enabled.
AC ELECTRICAL CHARACTERISTICS
T_amb = 0°C to +70°C or –40°C to +85°C, V_CC = 5V ±10%, V_SS = 0V^{4, 8}
SYMBOL
PARAMETER
1/t_CLCL
Oscillator frequency:
External Clock (Figure 4)
t_CHCX
t_CLCX
t_CLCH
t_CHCL
High time
Low time
Rise time
Fall time
16MHz CLOCK
MIN
MAX
20
20
20
20
VARIABLE CLOCK
MIN
MAX
3.5
16
20
20
20
20
UNIT
MHz
ns
ns
ns
ns
1998 Apr 23
13