PCF84C41AT Ver la hoja de datos (PDF) - Philips Electronics
Número de pieza
componentes Descripción
Fabricante
PCF84C41AT Datasheet PDF : 20 Pages
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Philips Semiconductors
Telecom microcontrollers
Product specification
PCF84C21A; PCF84C41A;
PCF84C81A
12 AC CHARACTERISTICS
VDD = 2.5 to 5.5 V; VSS = 0 V; Tamb = −40 to +85 °C; all voltages with respect to VSS; unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
tr
rise time all outputs
VDD = 5 V; Tamb = 25 °C; CL = 50 pF −
30
−
ns
tf
fall time all outputs
VDD = 5 V; Tamb = 25 °C; CL = 50 pF −
30
−
ns
fxtal
clock frequency
see Fig.3
1
−
16
MHz
Table 2 I2C-bus timing (see Figs 15 and 16)
SYMBOL
PARAMETER
INPUT
(see Fig.14)
OUTPUT
(see Fig.15; note 1)
SCLK
tHD;STA
tLOW
tHIGH
tRC
tFC
SDA
tBUF
tSU;DAT
tHD;DAT
tRD
tFD
tSU;STO
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
≥ f--1x---t4-a--l
≥ -f-1x---t7-a--l
≥ f--1x---t7-a--l
≤1 µs
≤0.3 µs
≥ f--1x---t4-a--l
≥ 250 ns
≥0
≤1 µs
≤0.3 µs
≥ f--1x---t4-a--l
2-D----×F-----f-+-x--t-9a--l
2-D----×-F----f-–-x--t-3a--l ; note 2
2-D----×F-----f-+-x--t-3a--l ; note 2
≤1 µs; note 3
≤0.1 µs; note 4
≥ 4.7 µs; note 5
≥ f--1x---t5-a--l ; note 6
≥ f--x-9--t-a--l
≤1 µs; note 3
≤0.1 µs; note 4
2-D----×-F----f-–-x--t-3a--l
Notes
1. DF stands for Division Factor: the divisor of fxtal (see the “PCF84CxxxA family” data sheet).
2. Values given for ASC = 0; for ASC = 1: tHIGH = -3----(-4--D--×---F--f--x-+-t--a--1l---)-- ; tLOW = 4-D----×-F----f-–-x--t-3a--l
3. Determined by I2C-bus capacitance (Cb) and external pull-up resistor.
4. At maximum allowed I2C-bus capacitance Cb = 400 pF.
5. Determined by program.
6. If tLOW < f--2x---t4-a--l , tSU:DAT ≥ t--L---O--f-W-x--t-a--–-l---9-- , independent of ASC.
1996 Nov 20
11
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