## 5 Electrical specifications of the SIM – ME interface

11.183GPPSpecification of the 1.8 Volt Subscriber Identity Module - Mobile Equipment (SIM - ME) InterfaceTS

The electrical specification given in the present document covers the supply voltage range from 1,62V to 1,98V. The supply voltage range from 2,7V to 3,3V is specified in GSM 11.12 [2]. For each state (VOH, VIH, VIL and VOL) a positive current is defined as flowing out of the entity (ME or SIM) in that state. Vpp is not supported by the 1,8V technology ME or the 1,8V technology SIM.

When the SIM is in idle state the current consumption of the card shall not exceed 200 µA at 1 MHz at +25°C. When the SIM is in clock stop mode the current consumption shall not exceed 100 µA at +25 °C.

The ME shall source the maximum current as defined in table 4. It shall also be able to counteract spikes in the current consumption of the card up to a maximum charge of 12 nAs with no more than 400 ns duration and an amplitude of at most 60 mA, ensuring that the supply voltage stays in the specified range.

The clock duty cycle shall be between 40 % and 60 % of the period during stable operation. A clock cycle is defined at 50% of Vcc from rising to rising edge or falling to falling edge. When switching clock frequencies MEs shall ensure that no pulse is shorter than 100 ns which is 40 % of the shortest allowed period.

The ME need not provide contact C6 (Vpp). Contact C6 shall not be connected in the ME if provided.

Table 1: Electrical characteristics of I/O under normal operating conditions

 Symbol Conditions Minimum Maximum Unit VIH IIHmax = ± 20 µA (Note 2) 0,7 x Vcc Vcc+0,3 V VIL IILmax = + 1 mA – 0,3 0,2 x Vcc V VOH (Note 1) IOHmax = + 20 µA 0,7 x Vcc Vcc (Note 3) V VOL IOLmax = – 1mA 0 (Note 3) 0,3 V tR tF Cin = Cout = 30 pF 1 µs NOTE 1: It is assumed that a pull-up resistor is used on the interface device (recommended value: 20 k ).NOTE 2: During static conditions (idle state) only the positive value can apply. Under dynamic operating conditions (transmissions) short term voltage spikes on the I/O line may cause a current reversal.NOTE 3: To allow for overshoot the voltage on I/O shall remain between -0,3V and Vcc+0,3V during dynamic operation.

Table 2: Electrical characteristics of Clock (CLK) under normal operating conditions

 Symbol Conditions Minimum Maximum Unit VOH IOHmax = + 20 µA 0,7 x Vcc Vcc (Note ) V VOL IOLmax = – 20 µA 0 (Note ) 0,2 x Vcc V tR tF Cin = Cout = 30 pF 50 ns NOTE: To allow for overshoot the voltage on CLK should remain between -0,3V and Vcc+0,3V during dynamic operations.

Table 3: Electrical characteristics of RESET (RST) under normal operating conditions

 Symbol Conditions Minimum Maximum Unit VOH IOHmax = + 20 µA 0,8 x Vcc Vcc (Note) V VOL IOLmax = -200 µA 0 (Note) 0,2 x Vcc V tR tF Cin = Cout = 30 pF 400 µs NOTE: To allow for overshoot the voltage on RST should remain between -0,3V and Vcc +0,3V during dynamic operations.

Table 4: Electrical characteristics of Vcc under normal operating conditions

 Symbol Minimum Maximum Unit Vcc 1,62 1,98 V Icc 4 (Note) mA NOTE: The supply current at 1,8V refers to a clock frequency of 4 MHz.

Annex A (informative):
Change history

This annex lists all change requests approved for this document since the the present document was approved by ETSI SMG.

 SMG# SMGtdoc SMG9tdoc VERS CR RV PH CAT SUBJECT ResultingVersion s28 P-99-180 98p188 2.0.0 R98 Approval of final draft by SMG 7.0.0