HEF4541BT-Q100: Programmable timer
The HEF4541B-Q100 is a programmable timer. It consists of a 16‑stage binary counter,
an integrated oscillator to be used with external timing components, an automatic
power-on reset and output control logic. The external components RTC and CTC
determines the frequency of the oscillator within the frequency range 1 Hz to 100 kHz. An
external clock signal at input RS can replace the oscillator. The timer advances on the
positive‑going transition of RS. A LOW on the auto reset input (AR) and a LOW on the
master reset input (MR) enables the internal power‑on reset. A HIGH level at input MR
resets the counter independent on all other inputs. Resetting, disables the oscillator to
provide no active power dissipation.
A HIGH at input AR turns off the power-on reset to provide a low quiescent power
dissipation of the timer. The 16‑stage counter divides the oscillator frequency by 28, 210,
213 or 216 depending on the state of the address inputs (A0, A1). The divided oscillator
frequency is available at output O. The phase input (PH) features a complementary output
signal. When the mode select input (MODE) is LOW the timer is a single transition timer
and when HIGH the timer is a 2n frequency divider.
It operates over a recommended VDD power supply range of 3 V to 15 V referenced to VSS
(usually ground). Unused inputs must be connected to VDD, VSS, or another input.
This product has been qualified to the Automotive Electronics Council (AEC) standard
Q100 (Grade 1) and is suitable for use in automotive applications.
sot108-1_3d
Data Sheets (1)
| Name/Description | Modified Date |
|---|
| Programmable timer (REV 2.0) PDF (539.0 kB) HEF4541B_Q100 | 31 Dec 2013 |
Application Notes (1)
Brochures (2)
Package Information (1)
Supporting Information (2)
Ordering Information
| Product | Status | VCC (V) | Family | Output drive capability (mA) | Description | Logic switching levels | tpd (ns) | fmax (MHz) | Power dissipation considerations | Tamb (Cel) | Rth(j-a) (K/W) | Ψth(j-top) (K/W) | Rth(j-c) (K/W) | Package name | No of pins | Package version |
|---|
| HEF4541BT-Q100 | Active | 4.5 - 15.5 | HEF4000B | - 4/ + 2.7 | programmable timer | CMOS | 38 | 150 | medium | -40~85 | 53 | 1.0 | 10 | SO14 | 14 | SOT108-1 |
Package Information
| Product ID | Package Description | Outline Version | Reflow/Wave Soldering | Packing | Product Status | Part NumberOrdering code(12NC) | Marking | Chemical Content | RoHS / Pb Free / RHF | LeadFree Conversion Date | EFR | MSL | MSL LF |
|---|
| HEF4541BT-Q100 | | SOT108-1 | SO-SOJ-REFLOW
SO-SOJ-WAVE
SO-SOJ-REFLOW
SO-SOJ-WAVE | Reel 13" Q1/T1 in Drypack | Active | HEF4541BT-Q100Y
(9353 022 66518) | HEF4541BT | HEF4541BT-Q100 |    | Always Pb-free | 75.3 | e1 | e3 |
