Datasheet

 1996 Microchip Technology Inc. DS30412C-page 149
PIC17C4X
Applicable Devices 42
R42 42A 43 R43 44
17.1 DC CHARACTERISTICS: PIC17C42-16 (Commercial, Industrial)
PIC17C42-25 (Commercial, Industrial)
DC CHARACTERISTICS
Standard Operating Conditions (unless otherwise stated)
Operating temperature
-40˚C ≤ T
A
≤ +85˚C for industrial and
0˚C ≤ T A ≤ +70˚C for commercial
Parameter
No. Sym Characteristic Min Typ† Max Units Conditions
D001 V
DD
Supply Voltage 4.5 – 5.5 V
D002 V
DR
RAM Data Retention
Voltage (Note 1)
1.5 * – – V Device in SLEEP mode
D003 V
POR
V
DD
start voltage to
ensure internal
Power-on Reset signal
–V
SS
– V See section on Power-on Reset for
details
D004 S
VDD
V
DD
rise rate to
ensure internal
Power-on Reset signal
0.060* – – mV/ms See section on Power-on Reset for
details
D010
D011
D012
D013
D014
I
DD
Supply Current
(Note 2)
–
–
–
–
–
3
6
11
19
95
6
12 *
24 *
38
150
mA
mA
mA
mA
µ A
F
OSC
= 4 MHz (Note 4)
F
OSC
= 8 MHz
F
OSC
= 16 MHz
F
OSC
= 25 MHz
F
OSC
= 32 kHz
WDT enabled (EC osc configuration)
D020
D021
I
PD
Power-down Current
(Note 3)
–
–
10
< 1
40
5
µ A
µ A
V
DD
= 5.5V, WDT enabled
V DD = 5.5V, WDT disabled
* These parameters are characterized but not tested.
† Data in "Typ" column is at 5V, 25˚C unless otherwise stated. These parameters are for design guidance
only and are not tested.
Note 1: This is the limit to which V
DD
can be lowered in SLEEP mode without losing RAM data.
2: The supply current is mainly a function of the operating voltage and frequency. Other factors such as I/O pin
loading and switching rate, oscillator type, internal code execution pattern, and temperature also have an
impact on the current consumption.
The test conditions for all I
DD measurements in active operation mode are:
OSC1 = external square wave, from rail to rail; all I/O pins tristated, pulled to V
DD
or V
SS
, T0CKI = V
DD
,
MCLR
= V DD
; WDT enabled/disabled as specified.
Current consumed from the oscillator and I/O’s driving external capacitive or resistive loads need to be con-
sidered.
For the RC oscillator, the current through the external pull-up resistor (R) can be estimated as: V
DD
/ (2 • R).
For capacitive loads, The current can be estimated (for an individual I/O pin) as (C
L
• V
DD
) • f
C
L
= Total capacitive load on the I/O pin; f = average frequency on the I/O pin switches.
The capacitive currents are most significant when the device is configured for external execution (includes
extended microcontroller mode).
3: The power-down current in SLEEP mode does not depend on the oscillator type. Power-down current is
measured with the part in SLEEP mode, all I/O pins in hi-impedance state and tied to V
DD
or V
SS
.
4: For RC osc configuration, current through Rext is not included. The current through the resistor can be esti-
mated by the formula I
R
= V
DD
/2Rext (mA) with Rext in kOhm.