PCF84C85AT PHILIPS [NXP Semiconductors], PCF84C85AT Datasheet - Page 12

• Manufacturer Part Number: PCF84C85AT
• Description: Microcontroller with extended I/O
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
13 AC CHARACTERISTICS
V
Table 4 I
Notes
1. DF stands for Division Factor: the divisor of f
2. Values given for ASC = 0; for ASC = 1: t
3. Determined by I
4. At maximum allowed I
5. Determined by program.
6. If t
1996 Nov 21
t
t
f
SCLK
t
t
t
t
t
SDA
t
t
t
t
t
t
DD
r
f
xtal
HD;STA
LOW
HIGH
RC
FC
BUF
SU;DAT
HD;DAT
RD
FD
SU;STO
Microcontroller with extended I/O
SYMBOL
= 2.5 to 5.5 V; V
SYMBOL
LOW
2
<
C-bus timing (see Figs 14 and 15)
--------
f
24
xtal
rise time all outputs
fall time all outputs
clock frequency
, t
SU:DAT
2
SS
C-bus capacitance (C
START condition hold time
SCLK LOW time
SCLK HIGH time
SCLK rise time
SCLK fall time
bus free time
data set-up time
data hold time
SDA/P2.3 rise time
SDA/P2.3 fall time
STOP condition set-up time
PARAMETER
= 0 V; T
2
C-bus capacitance C
t
-------------------- -
LOW
f
xtal
amb
–
PARAMETER
9
= 40 to +85 C; all voltages with respect to V
, independent of ASC.
b
) and external pull-up resistor.
HIGH
V
V
see Fig.3
DD
DD
b
xtal
=
= 400 pF.
= 5 V; T
= 5 V; T
3 DF
----------------------------
(see “PCF84CXXXA family” data sheet).
4 f
CONDITIONS
xtal
+
12
amb
amb
1
= 25 C; C
= 25 C; C
; t
LOW
=
(see Fig.14)
----------------- -
4 f
DF 3
INPUT
L
L
250 ns
0.3 s
0.3 s
= 50 pF
= 50 pF
--------
f
--------
f
--------
f
1 s
--------
f
1 s
--------
f
14
17
17
14
14
xtal
xtal
xtal
xtal
xtal
–
0
xtal
SS
; unless otherwise specified.
1
MIN.
30
30
TYP.
(see Fig.15; note 1)
----------------- -
2 f
PCF84C85A
DF 3
----------------- -
2 f
DF
Product specification
0.1 s; note 4
4.7 s; note 5
0.1 s; note 4
1 s; note 3
--------
f
1 s; note 3
15
OUTPUT
xtal
DF
----------------- -
2 f
----------------- -
2 f
–
DF 3
+
xtal
xtal
16
MAX.
--------
f
3
xtal
9
+
–
xtal
xtal
; note 6
9
; note 2
; note 2
ns
ns
MHz
UNIT